US4881104A
Expired / Lapsed
US
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Image forming apparatus having a plurality of feed openings
Assignee: Minolta Co Ltd
•
Filing: 1988-04-22
•
Granted: 1989-11-14
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Expires: 2008-04-22
Abstract
Abstract When paper jam occurs during copy operation, the paper feed opening (which is one of the paper feed openings 1a to 1d) in which the paper jam occurs is determined, and thus, the number of occurrences of paper jam is counted for each of the paper feed openings. When the number of occurred times of paper jam exceeds a predetermined number, the paper feed opening concerned is forbidden to be used until maintenance or other repair work is completed. If the preferred feed opening (1a) assigned the first priority is forbidden to be used, another preferential feed opening is selected based on the numbers of occurred times of paper jam in the other paper feed openings (1b to 1d). On the other hand, when paper jam occurs, a paper jam occurrence ratio is calculated for each paper feed opening based on the number of sheets and the number of occurred times of paper jam counted. Based on the result of the calculation, control operation for selecting the paper feed openings (1a to 1d) including the preferential one is performed.
Inventors
- 👤 Keiji Kusumoto
- 👤 Kenzo Nagata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6502; G03G15/6508; G03G15/50; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00379; G03G2215/00383; G03G2215/00396; G03G2215/00535; G03G2215/00548
Claims Analysis
Total Claims: 68
Claim 1
Independent Claim
172 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, first selection means for manually selecting any one of said plurality of paper feed means, forbidding means for forbidding said first selection means to select the paper feed means in which the number of erroneous feeding operations counted by said counting means exceeds a predetermined number, designation means for designating the paper feed means in which the number of erroneous feeding operations is the smallest out of the paper feed means the selection of which is not forbidden by said forbidding means, each time said forbidding means is operated, initialization signal generating means, and second selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 2
Dependent Claim
172 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, first selection means for manually selecting any one of said plurality of paper feed means, forbidding means for forbidding said first selection means to select the paper feed means in which the number of erroneous feeding operations counted by said counting means exceeds a predetermined number, designation means for designating the paper feed means in which the number of erroneous feeding operations is the smallest out of the paper feed means the selection of which is not forbidden by said forbidding means, each time said forbidding means is operated, initialization signal generating means, and second selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 3
Dependent Claim
38 words
An image forming apparatus in accordance with claim 1, further comprising a power switch for turning on a power supply, wherein said initialization signal generating means outputs the initialization signal in response to turn-on of said power switch.
Claim 4
Dependent Claim
36 words
An image forming apparatus in accordance with claim 1, wherein said initialization signal generating means outputs the initialization signal after a lapse of a predetermined period from an end of operation of said image forming means.
Claim 5
Dependent Claim
56 words
An image forming apparatus in accordance with claim 1, further comprising image formation instructing means for instructing a start of image forming operation, wherein said initialization signal generating means outputs the initialization signal when said image formation instructing means is not enabled within a predetermined period after an end of operation of said first selection means.
Claim 6
Dependent Claim
37 words
An image forming apparatus in accordance with claim 1, further comprising cancel means for cancelling forbidding of the selection of the paper feed means by said forbidding means and initializing a count value in said counting means.
Claim 7
Dependent Claim
22 words
An image forming apparatus in accordance with claim 1, further comprising display means for indicating that said forbidding means is in operation.
Claim 8
Dependent Claim
93 words
An image forming apparatus comprising: a plurality of paper feed means for feeing sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, initialization signal generating means, and selection means for selecting the paper feed means in which the number of erroneous feeding operations counted by said counting means is the smallest, in response to the initialization signal from said initialization signal generating means.
Claim 9
Dependent Claim
93 words
An image forming apparatus comprising: a plurality of paper feed means for feeing sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, initialization signal generating means, and selection means for selecting the paper feed means in which the number of erroneous feeding operations counted by said counting means is the smallest, in response to the initialization signal from said initialization signal generating means.
Claim 10
Dependent Claim
103 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, designation means for designating one of said plurality of paper feed means according to a count value of said counting means, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 11
Dependent Claim
103 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, designation means for designating one of said plurality of paper feed means according to a count value of said counting means, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 12
Dependent Claim
95 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, selection means for selecting one of said plurality of paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, and forbidding means for forbidding said selection means to select the paper feed means in which the number of erroneous feeding operations counted by said counting means exceeds a predetermined number.
Claim 13
Dependent Claim
95 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, selection means for selecting one of said plurality of paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, and forbidding means for forbidding said selection means to select the paper feed means in which the number of erroneous feeding operations counted by said counting means exceeds a predetermined number.
Claim 14
Dependent Claim
167 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming for forming an image on the sheet fed bu said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, first selection means for manually selecting any one of said plurality of paper feed means, forbidding means for forbidding said first selection means to select the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, designation means for designating the paper feed means in which the erroneous feeding occurrence ratio is the smallest out of the paper feed means the selection of which is not forbidden by said forbidding means, each time said forbidding means is operated, initialization signal generating means, and second selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 15
Dependent Claim
167 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming for forming an image on the sheet fed bu said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, first selection means for manually selecting any one of said plurality of paper feed means, forbidding means for forbidding said first selection means to select the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, designation means for designating the paper feed means in which the erroneous feeding occurrence ratio is the smallest out of the paper feed means the selection of which is not forbidden by said forbidding means, each time said forbidding means is operated, initialization signal generating means, and second selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 16
Dependent Claim
38 words
An image forming apparatus in accordance with claim 10, further comprising a power switch for turning on a power supply, wherein said initialization signal generating means outputs the initialization signal in response to turn-on of said power switch.
Claim 17
Dependent Claim
36 words
An image forming apparatus in accordance with claim 10, wherein said initialization signal generating means outputs the initialization signal after a lapse of a predetermined period from an end of operation of said image forming means.
Claim 18
Dependent Claim
56 words
An image forming apparatus in accordance with claim 10, further comprising image formation instructing means for instructing a start of image forming operation, wherein said initialization signal generating means outputs the initialization signal when said image formation instructing means is not enabled within a predetermined period after an end of operation of said first selection means.
Claim 19
Dependent Claim
37 words
An image forming apparatus in accordance with claim 10, further comprising cancel means for cancelling forbidding of the selection of the paper feed means by said forbidding means and initializing a value obtained by said calculation means.
Claim 20
Dependent Claim
22 words
An image forming apparatus in accordance with claim 10, further comprising display means for indicating that said forbidding means is in operation.
Claim 21
Dependent Claim
84 words
An image forming apparatus in accordance with claim 10, wherein said calculation means comprises first counting means for counting the number of sheets fed from each of said plurality of paper feed means, and second counting means for counting the number of erroneous feeding operations in each of said plurality of paper feed means, thereby to calculate the erroneous feeding occurrence ratio based on the number of sheets and the number of erroneous feeding operations counted by said first and second counting means, respectively.
Claim 22
Dependent Claim
38 words
An image forming apparatus in accordance with claim 16, wherein said calculation means does not calculate the erroneous feeding occurrence ratio when the number of sheets counted by said first counting means does not attain a predetermined number.
Claim 23
Dependent Claim
90 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, initialization signal generating means, and selection means for selecting the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means is the smallest, in response to an output signal from said initialization signal generating means.
Claim 24
Dependent Claim
90 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, initialization signal generating means, and selection means for selecting the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means is the smallest, in response to an output signal from said initialization signal generating means.
Claim 25
Dependent Claim
100 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, designation means for designating one of said plurality of paper feed means, based on a value calculated by said calculation means, initialization signal generating means, and selection means for selecting the feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 26
Dependent Claim
100 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, designation means for designating one of said plurality of paper feed means, based on a value calculated by said calculation means, initialization signal generating means, and selection means for selecting the feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 27
Dependent Claim
92 words
An image forming apparatus comprising: a plurality of paper feed means for feeing sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, selection means for selecting one of said plurality of paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, and forbidding means for forbidding said selection means to select the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value.
Claim 28
Dependent Claim
92 words
An image forming apparatus comprising: a plurality of paper feed means for feeing sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, selection means for selecting one of said plurality of paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, and forbidding means for forbidding said selection means to select the paper feed means in which the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value.
Claim 29
Dependent Claim
183 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, first designation means for designating one of said plurality of paper feed means, initialization signal generating means, first selection means for selecting the paper feed means designated by said first designation means, in response to the initialization signal from said initialization signal generating means, counting means for counting the number of erroneous feeding operations occurring in the paper feed means designated by said first designation means, second designation means for designating a paper feed means different from the paper feed means selected by said first selection means, when the number of erroneous feeding operations in the paper feed means designated by said first designation means, counted by said counting means exceeds a predetermined number, and second selection means for selecting the paper feed means designated by said second designation means, in response to the initialization signal from said initialization signal generating means, irrespective of the designation by said first designation means.
Claim 30
Dependent Claim
183 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, first designation means for designating one of said plurality of paper feed means, initialization signal generating means, first selection means for selecting the paper feed means designated by said first designation means, in response to the initialization signal from said initialization signal generating means, counting means for counting the number of erroneous feeding operations occurring in the paper feed means designated by said first designation means, second designation means for designating a paper feed means different from the paper feed means selected by said first selection means, when the number of erroneous feeding operations in the paper feed means designated by said first designation means, counted by said counting means exceeds a predetermined number, and second selection means for selecting the paper feed means designated by said second designation means, in response to the initialization signal from said initialization signal generating means, irrespective of the designation by said first designation means.
Claim 31
Dependent Claim
32 words
An image forming apparatus in accordance with claim 21, wherein operation of said first selection means is forbidden when one of said paper feed means is designated by said second designation means.
Claim 32
Dependent Claim
69 words
An image forming apparatus in accordance with claim 21, further comprising third selection means for manually selecting an arbitrary one of said plurality of paper feed means, and forbidding means for forbidding said third selection means to select the paper feed means designated by said first designation means when the number of erroneous feeding operations in said paper feed means, counted by said counting means exceeds a predetermined number.
Claim 33
Dependent Claim
22 words
An image forming apparatus in accordance with claim 23, further comprising display means for indicating that said forbidding means is in operation.
Claim 34
Dependent Claim
26 words
An image forming apparatus in accordance with claim 21, further comprising cancel means for canceling designation of the paper feed means by said second designation means.
Claim 35
Dependent Claim
38 words
An image forming apparatus in accordance with claim 21, further comprising a power switch for turning on a power supply, wherein said initialization signal generating means generates the initialization signal in response to turn-on of said power switch.
Claim 36
Dependent Claim
36 words
An image forming apparatus in accordance with claim 21, wherein said initialization signal generating means generates the initialization signal after a lapse of a predetermined period from an end of operation of said image forming means.
Claim 37
Dependent Claim
56 words
An image forming apparatus in accordance with claim 21, further comprising image formation instructing means for instructing a start of image forming operation, wherein said initialization signal generating means outputs the initialization signal when said image formation instructing means is not enabled within a predetermined period after an end of operation of said first selection means.
Claim 38
Dependent Claim
64 words
An image forming apparatus in accordance with claim 21, wherein said counting means counts the number of erroneous feeding operations occurring in the paper feed means designated by said second designation means and said second designation means designates another different feed means when the number of erroneous feeding operations in the paper feed means designated by said second designation means exceeds a predetermined number.
Claim 39
Dependent Claim
133 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, designation means for designating a paper feed means to be preferentially used out of said plurality of paper feed means, counting means for counting the number of erroneous feeding operations in the paper feed means designated by said designation means, control means for controlling said designation means to designated a paper feed means different from the presently designated means when the count value by said counting means exceeds a predetermined value, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 40
Dependent Claim
133 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, designation means for designating a paper feed means to be preferentially used out of said plurality of paper feed means, counting means for counting the number of erroneous feeding operations in the paper feed means designated by said designation means, control means for controlling said designation means to designated a paper feed means different from the presently designated means when the count value by said counting means exceeds a predetermined value, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 41
Dependent Claim
169 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, first designation means for designating one of said plurality of paper feed means, initialization signal generating means, first selection means for selecting the paper feed means designated by said first designation means, in response to the initialization signal from said initialization signal generating means, calculation means for calculating an erroneous feeding occurrence ratio in the paper feed means designated by said first designation means, second designation means for designating a paper feed means different from the paper feed means designated by said first designation means, when the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, and second selection means for selecting the paper feed means designation by said second designation means, in response to the initialization signal from said initialization signal generating means, irrespective of the designation of said first designation means.
Claim 42
Dependent Claim
169 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, first designation means for designating one of said plurality of paper feed means, initialization signal generating means, first selection means for selecting the paper feed means designated by said first designation means, in response to the initialization signal from said initialization signal generating means, calculation means for calculating an erroneous feeding occurrence ratio in the paper feed means designated by said first designation means, second designation means for designating a paper feed means different from the paper feed means designated by said first designation means, when the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, and second selection means for selecting the paper feed means designation by said second designation means, in response to the initialization signal from said initialization signal generating means, irrespective of the designation of said first designation means.
Claim 43
Dependent Claim
34 words
An image forming apparatus in accordance with claim 31, wherein operation of said first selection means is forbidden when one of said plurality of paper feed means is designated by said second designation means.
Claim 44
Dependent Claim
68 words
An image forming apparatus in accordance with claim 31, further comprising third selection means for manually selecting an arbitrary one of said plurality of paper feed means, and forbidding means for forbidding said third selection means to select the paper feed means designated by said first designation means when the erroneous feeding occurrence ratio in said paper feed means calculated by said calculation means exceeds a predetermined value.
Claim 45
Dependent Claim
22 words
An image forming apparatus in accordance with claim 31, further comprising display means for indicating that said forbidding means is in operation.
Claim 46
Dependent Claim
26 words
An image forming apparatus in accordance with claim 31, further comprising cancel means for canceling designation of the paper feed means by said second designation means.
Claim 47
Dependent Claim
38 words
An image forming apparatus in accordance with claim 31, further comprising a power switch for turning on a power supply, wherein said initialization signal generating means generates the initialization signal in response to turn-on of said power switch.
Claim 48
Dependent Claim
33 words
An image forming apparatus in accordance with claim 31, wherein said initialization signal generating means generates the initialization signal after a predetermined period from an end of operation of said image forming means.
Claim 49
Dependent Claim
56 words
An image forming apparatus in accordance with claim 31, further comprising image formation instructing means for instructing a start of image forming operation, wherein said initialization signal generating means, outputs the initialization signal when said image formation instructing means is not enabled within a predetermined period after an end of operation of said first selection means.
Claim 50
Dependent Claim
62 words
An image forming apparatus in accordance with claim 31, wherein said calculation means further calculates an erroneous feeding occurrence ratio of the paper feed means designated by said second designation means, and said second designation means designates another different feed means when the erroneous feeding occurrence ratio of the paper feed means designated by said second designation means exceeds a predetermined value.
Claim 51
Dependent Claim
84 words
An image forming apparatus in accordance with claim 31, wherein said calculation means comprises first counting means for counting the number of sheets fed from each of said plurality of paper feed means, and second counting means for counting the number of erroneous feeding operations in each of said plurality of paper feed means, thereby to calculate the erroneous feeding occurrence ratio based on the number of sheets and the number of erroneous feeding operations counted by said first and second counting means, respectively.
Claim 52
Dependent Claim
38 words
An image forming apparatus in accordance with claim 40, wherein said calculation means does not calculate the erroneous feeding occurrence ratio when the number of sheets counted by said first counting means does not attain a predetermined number.
Claim 53
Dependent Claim
133 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said feed means, designation means for designating paper feed means to be preferentially used out of said plurality of paper feed means, calculation means for calculating an erroneous feeing occurrence ratio in the paper feed means designated by said designation means, control means for controlling said designation means to designate a paper feed means different from the presently designated means when the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 54
Dependent Claim
133 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said feed means, designation means for designating paper feed means to be preferentially used out of said plurality of paper feed means, calculation means for calculating an erroneous feeing occurrence ratio in the paper feed means designated by said designation means, control means for controlling said designation means to designate a paper feed means different from the presently designated means when the erroneous feeding occurrence ratio calculated by said calculation means exceeds a predetermined value, initialization signal generating means, and selection means for selecting the paper feed means designated by said designation means, in response to the initialization signal from said initialization signal generating means.
Claim 55
Dependent Claim
103 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, selection means for successively selecting said plurality of paper feed means in a predetermined order, in response to the output of said manual switch means, and control means for changing said predetermined order based on the count value of said counting means.
Claim 56
Dependent Claim
103 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting the number of erroneous feeding operations occurring in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, selection means for successively selecting said plurality of paper feed means in a predetermined order, in response to the output of said manual switch means, and control means for changing said predetermined order based on the count value of said counting means.
Claim 57
Dependent Claim
59 words
An image forming apparatus in accordance with claim 43, wherein said counting means counts individually the number of erroneous feeding operations occurring in each of said plurality of paper feed means and said control means changes said predetermined order when the number of erroneous feeding operations in any of said plurality of paper feed means exceeds a predetermined value.
Claim 58
Dependent Claim
58 words
An image forming apparatus in accordance with claim 43, wherein said counting means counts the number of erroneous feeding operations occurring in a specified one of said plurality of paper feed means and said control means changes said predetermined order when the number of erroneous feeding operations occurring in said specified paper feed means exceeds the predetermined value.
Claim 59
Dependent Claim
49 words
An image forming apparatus in accordance with claim 44 or claim 45, wherein the paper feed means where the number of erroneous feeding operations exceeds said predetermined value is excluded from the paper feed means on which the change of said predetermined order by said control means is based.
Claim 60
Dependent Claim
108 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting individually the number of erroneous feeding operations occurring in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, and control means responsive to the output of said manual switch means for successively selecting said plurality of paper feed means in ascending order beginning with the paper feed opening in which the number of erroneous feeding operations counted by said counting means is the smallest.
Claim 61
Dependent Claim
108 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, counting means for counting individually the number of erroneous feeding operations occurring in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, and control means responsive to the output of said manual switch means for successively selecting said plurality of paper feed means in ascending order beginning with the paper feed opening in which the number of erroneous feeding operations counted by said counting means is the smallest.
Claim 62
Dependent Claim
100 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, selection means responsive to the output of said manual switch mans for successively selecting said plurality of paper feed means in a predetermined order, and control means for changing said predetermined order based on a value calculated by said calculation means.
Claim 63
Dependent Claim
100 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, selection means responsive to the output of said manual switch mans for successively selecting said plurality of paper feed means in a predetermined order, and control means for changing said predetermined order based on a value calculated by said calculation means.
Claim 64
Dependent Claim
56 words
An image forming apparatus in accordance with claim 48, wherein said calculation means calculates individually the erroneous feeding occurrence ratio in each of said plurality of paper feed means and said control means changes said predetermined order when the erroneous feeding occurrence ratio in any of said plurality of paper feed means exceeds the predetermined value.
Claim 65
Dependent Claim
54 words
An image forming apparatus in accordance with claim 48, wherein said calculation means calculates the erroneous feeding occurrence ratio in a specified one of said plurality of paper feed means and said control means changes said predetermined order when the erroneous feeding occurrence ratio in said specified paper feed means exceeds the predetermined value.
Claim 66
Dependent Claim
49 words
An image forming apparatus in accordance with claim 49 or claim 50, wherein the paper feed means in which the erroneous feeding occurrence ratio exceeds said predetermined value is excluded from the paper feed means on which the change of said predetermined order by said control means is based.
Claim 67
Dependent Claim
104 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, and control means responsive to the output of said manual switch means for successively selecting said plurality of paper feed means in ascending order beginning with the paper feed opening in which the erroneous feeding occurrence ratio calculated by said calculation means is the smallest.
Claim 68
Dependent Claim
104 words
An image forming apparatus comprising: a plurality of paper feed means for feeding sheets of paper, image forming means for forming an image on the sheet fed by said paper feed means, calculation means for calculating an erroneous feeding occurrence ratio in each of said plurality of paper feed means, manual switch means for manually generating a switch signal, and control means responsive to the output of said manual switch means for successively selecting said plurality of paper feed means in ascending order beginning with the paper feed opening in which the erroneous feeding occurrence ratio calculated by said calculation means is the smallest.
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USPTO Annuity & Maintenance Windows
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| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |