Patent US5612776A successfully refreshed from Google Patents.
US5612776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus and method with sheet feed control that controls loop
Assignee: Canon Inc
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Filing: 1995-03-27
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Granted: 1997-03-18
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Expires: 2015-03-27
Abstract
Abstract When a recording medium fed from a sheet feed drive mechanism is detected at a predetermined position, the counting of a loop feed time or the like variably set in accordance with a predetermined sheet feed condition such as the sheet type or particular supplying device is started, and the drive of the sheet feed drive mechanism is controlled by terminating the feeding operation in accordance with a count termination state. A count time of a timer for detecting a feed jam is variably set in accordance with a sheet feed condition such as material of sheet.
Inventors
- 👤 Hitoshi Machino
- 👤 Hiroshi Hashimoto
- 👤 Soya Endo
- 👤 Tomohiro Nakamori
- 👤 Masanori Ishizu
- 👤 Junichi Kimizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:03
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/10; B65H9/103; B65H9/106; G; G03; G03G; G03G15/00; G03G15/65; G03G15/6555; G03G15/6558; G03G15/6561; G03G15/6564; G03G15/70; B65H2511/00; B65H2511/10; B65H2511/11; B65H2511/112; B65H2511/40; B65H2511/414; G03G2215/00; G03G2215/00362; G03G2215/00443; G03G2215/00447; G03G2215/00535; G03G2215/00548
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
93 words
A sheet feeding apparatus comprising: transport rollers for transporting a sheet; means for driving said transport rollers; registration rollers for registrating the sheet transported by the transport rollers; detection means, provided between the transport rollers and the registration rollers, for detecting the sheet; and control means for controlling the drive of said transport rollers in accordance with the detection of the sheet by the detecting means in a plurality of control modes, a flexure of the sheet between said transport rollers and said registration rollers being different in each of the control modes.
Claim 2
Dependent Claim
93 words
A sheet feeding apparatus comprising: transport rollers for transporting a sheet; means for driving said transport rollers; registration rollers for registrating the sheet transported by the transport rollers; detection means, provided between the transport rollers and the registration rollers, for detecting the sheet; and control means for controlling the drive of said transport rollers in accordance with the detection of the sheet by the detecting means in a plurality of control modes, a flexure of the sheet between said transport rollers and said registration rollers being different in each of the control modes.
Claim 3
Dependent Claim
42 words
A sheet feeding apparatus according to claim 1, further comprising means for determining that the sheet is jamming when said detection means does not detect the sheet after elapse of a predetermined time after start of the drive of said transport rollers.
Claim 4
Dependent Claim
41 words
A sheet feeding apparatus according to claim 2, further comprising means for forming an image on an image bearing member and transfer means for transferring the image formed on the image bearing member to the sheet transported by said registration rollers.
Claim 5
Dependent Claim
38 words
A sheet feeding apparatus according to claim 3, further comprising determining means for determining a completion timing of an image forming operation on the basis of detection of a trailing edge of the sheet by said detecting means.
Claim 6
Dependent Claim
41 words
A sheet feeding apparatus according to claim 3, further comprising means for discharging the sheet to which the image is transferred and discharge control means for controlling an operation timing of said discharge means on the basis of said detecting means.
Claim 7
Dependent Claim
29 words
An apparatus according to claim 3, wherein said apparatus makes image formation onto the image bearing member in synchronism with the transportation of the sheet by said registration rollers.
Claim 8
Dependent Claim
31 words
A sheet apparatus according to claim 1, further comprising means for inputting information relating to a sheet type, wherein said control means selects the control mode in accordance with input information.
Claim 9
Dependent Claim
39 words
A sheet apparatus according to claim 1, further comprising a plurality of sheet feeding means for feeding the sheet to said transport rollers, wherein said control means selects the control mode corresponding to each of said sheet feeding means.
Claim 10
Dependent Claim
20 words
An apparatus according to claim 1, wherein the control mode is selected in accordance with a material of the sheet.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 9, further comprising means for inputting a designation of the material of the sheet.
Claim 12
Dependent Claim
35 words
An apparatus according to claim 1, wherein said apparatus has a plurality of sets of transport rollers, and the control mode is selected in accordance with the transport rollers by which the sheet is transported.
Claim 13
Dependent Claim
35 words
An apparatus according to claim 1, wherein after the sheet is detected by said detection means in accordance with the control mode, the time when the drive of said transport rollers is stopped is different.
Claim 14
Independent Claim
86 words
An apparatus comprising: a sheet feed mechanism; detection means for detecting at a predetermined position a sheet fed from said sheet feed mechanism; means for registrating the sheet fed by said sheet feed mechanism; and control means for controlling the drive of said sheet feed mechanism in accordance with an output of said detection means in one of a plurality of control modes, a loop amount of a sheet between said sheet feed mechanism and said registrating means in each of the control modes being different.
Claim 15
Independent Claim
86 words
An apparatus comprising: a sheet feed mechanism; detection means for detecting at a predetermined position a sheet fed from said sheet feed mechanism; means for registrating the sheet fed by said sheet feed mechanism; and control means for controlling the drive of said sheet feed mechanism in accordance with an output of said detection means in one of a plurality of control modes, a loop amount of a sheet between said sheet feed mechanism and said registrating means in each of the control modes being different.
Claim 16
Dependent Claim
34 words
An apparatus according to claim 13, wherein said control means renders driving time of said sheet feed mechanism after detection of said sheet by said detection means different in accordance with the control mode.
Claim 17
Dependent Claim
22 words
An apparatus according to claim 13, further comprising means for selecting the control mode in accordance with a material of the sheet.
Claim 18
Dependent Claim
52 words
An apparatus according to claim 13, further comprising at least one sheet feed mechanisms and a selection means for selecting one of said sheet feed mechanisms, wherein said control means determines the loop amount to be formed by the sheet in accordance with the sheet feed mechanism selected by said selection means.
Claim 19
Dependent Claim
42 words
An apparatus according to claim 13, further comprising designation means for designating a material of the recording medium, wherein said control means determines the loop amount to be formed by the sheet in accordance with the material designation by said designation means.
Claim 20
Dependent Claim
17 words
An apparatus according to claim 13, further comprising means for recording an image on the fed sheet.
Claim 21
Dependent Claim
32 words
An apparatus according to claim 18, wherein said recording means comprises means for forming the image on an image bearing member and means for transferring the image formed on the bearing member.
Claim 22
Dependent Claim
20 words
An apparatus according to claim 18, wherein said recording means records the image on the sheet using an electrographic method.
Claim 23
Dependent Claim
18 words
An apparatus according to claim 18, wherein said registrating means conveys the registered sheet to said recording means.
Claim 24
Dependent Claim
28 words
An apparatus according to claim 21, wherein said apparatus makes the recording by said recording means in synchronism with the conveyance of the sheet by said registrating means.
Claim 25
Dependent Claim
125 words
A recording apparatus comprising: a sheet feed drive mechanism; detection means for detecting at a predetermined position a recording medium fed from said sheet feed drive mechanism; a timer for counting a loop feed time for defining a loop amount formed by said recording medium in accordance with an output state of said detection means; setting means for variably setting the loop feed time to be counted by said timer; control means for controlling the drive of said sheet feed drive mechanism by terminating a feeding operation in accordance with the counting by said timer; and designation means for designating a material of the recording medium, said setting means variably setting the loop feed time in accordance with the material designation by said designation means.
Claim 26
Dependent Claim
125 words
A recording apparatus comprising: a sheet feed drive mechanism; detection means for detecting at a predetermined position a recording medium fed from said sheet feed drive mechanism; a timer for counting a loop feed time for defining a loop amount formed by said recording medium in accordance with an output state of said detection means; setting means for variably setting the loop feed time to be counted by said timer; control means for controlling the drive of said sheet feed drive mechanism by terminating a feeding operation in accordance with the counting by said timer; and designation means for designating a material of the recording medium, said setting means variably setting the loop feed time in accordance with the material designation by said designation means.
Claim 27
Dependent Claim
139 words
A recording apparatus comprising: a sheet feed drive mechanism; detection means for detecting at a predetermined position a recording medium fed from said sheet feed drive mechanism; a timer for counting a loop feed time for defining a loop amount formed by said recording medium in accordance with an output state of said detection means; setting means for variably setting the loop feed time to be counted by said timer; control means for controlling the drive of said sheet feed drive mechanism by terminating a feeding operation in accordance with the counting by said timer; and a plurality of sheet feed drive mechanisms and a selection means for selecting one of said sheet feed drive mechanisms, wherein said setting means variably sets the loop feed time in accordance with the sheet feed drive mechanism selected by said selection means.
Claim 28
Dependent Claim
139 words
A recording apparatus comprising: a sheet feed drive mechanism; detection means for detecting at a predetermined position a recording medium fed from said sheet feed drive mechanism; a timer for counting a loop feed time for defining a loop amount formed by said recording medium in accordance with an output state of said detection means; setting means for variably setting the loop feed time to be counted by said timer; control means for controlling the drive of said sheet feed drive mechanism by terminating a feeding operation in accordance with the counting by said timer; and a plurality of sheet feed drive mechanisms and a selection means for selecting one of said sheet feed drive mechanisms, wherein said setting means variably sets the loop feed time in accordance with the sheet feed drive mechanism selected by said selection means.
Claim 29
Dependent Claim
74 words
A recording apparatus according to claim 24, further comprising: second setting means for variably setting a feed elapse time from a start of feeding from said sheet feed drive mechanism; a second timer for counting the feed elapse time set by said second setting means; and discrimination means for determining the presence or absence of feed jam in accordance with the counting of said second timer and the output state of said detection means.
Claim 30
Dependent Claim
53 words
A recording apparatus according to claim 25, further comprising a plurality of sheet feed drive mechanisms and a selection means for selecting one of said sheet feed drive mechanisms, wherein said second setting means variably sets the feed elapse time in accordance with the sheet feed drive mechanism selected by said selection means.
Claim 31
Dependent Claim
39 words
A recording apparatus according to claim 25, further comprising designation means for designating a material of the recording medium, said second setting means variably setting the feed elapse time in accordance with the material designation by said designation means.
Claim 32
Dependent Claim
57 words
A recording apparatus according to claim 25, further comprising: a third timer for counting an elapsed time from the passage of the recording medium through said predetermined position in accordance with the detection by said detection means; and termination control means for controlling a record sequence termination timing in accordance with the counting of said third timer.
Claim 33
Dependent Claim
58 words
A recording apparatus according to claim 25, further comprising: a third timer for counting an elapsed time from the passage through said predetermined position in accordance with the detection by said detection means; and sheet ejection control means for controlling an automatic sheet ejection sequence for the recording medium in accordance with the counting of said third timer.
Claim 34
Independent Claim
85 words
A method of feeding sheets with a sheet feed mechanism comprising the steps of: selecting one of a plurality of control modes; detecting a sheet fed from the sheet feed mechanism at a position between the sheet feed mechanism and registration means downstream of said sheet feed mechanism; and controlling the drive of the sheet feed mechanism in accordance with said detection, a loop amount of a sheet between the sheet feed mechanism and the registration means in each of the control modes being different.
Claim 35
Independent Claim
85 words
A method of feeding sheets with a sheet feed mechanism comprising the steps of: selecting one of a plurality of control modes; detecting a sheet fed from the sheet feed mechanism at a position between the sheet feed mechanism and registration means downstream of said sheet feed mechanism; and controlling the drive of the sheet feed mechanism in accordance with said detection, a loop amount of a sheet between the sheet feed mechanism and the registration means in each of the control modes being different.
Claim 36
Dependent Claim
27 words
A method according to claim 30, wherein the driving time of the sheet feed mechanism after detection of the sheet differs in accordance with the control mode.
Claim 37
Dependent Claim
24 words
A method according to claim 30, wherein in the selecting step, the control mode is selected in accordance with a material of the sheet.
Claim 38
Dependent Claim
30 words
A method according to claim 30, wherein a plurality of sheet feed mechanisms are provided and the plurality of control modes correspond to the plurality of sheet feed mechanisms, respectively.
Claim 39
Dependent Claim
35 words
A method according to claim 30, further comprising the steps of designating a material of the recording medium, and determining the loop amount to be formed by the sheet in accordance with the material designation.
Claim 40
Dependent Claim
18 words
A method according to claim 30, further comprising the step of recording the image on the fed sheet.
Claim 41
Dependent Claim
32 words
A method according to claim 35, wherein said recording step comprises the steps of forming the image on an image bearing member and transferring the image formed on the image bearing member.
Claim 42
Dependent Claim
22 words
A method according to claim 35, wherein in said recording step, the image is recorded on the sheet using an electrographic method.
Claim 43
Dependent Claim
21 words
A method according to claim 35, further comprising the step of conveying the sheet registrated by said registration means for recording.
Claim 44
Dependent Claim
28 words
A method according to claim 38, wherein said recording step is made in synchronism with said conveying step in which the sheet is conveyed by said registration means.
Claim 45
Dependent Claim
126 words
A sheet feeding method comprising: detecting at a predetermined position a recording medium fed from a sheet feed drive mechanism; variably setting a loop feed time to be counted; counting the loop feed time for defining a loop amount formed by said recording medium in accordance with an output of the detection; controlling the drive of the sheet feed drive mechanism by terminating a feeding operation in accordance with the counting of the loop feed time; variably setting a feed elapse time from a start of feeding from the sheet feed drive mechanism; counting the feed elapse time set; and determining the presence or absence of a feed jam in accordance with the counting of the feed elapse time and the output state of the detection.
Claim 46
Dependent Claim
126 words
A sheet feeding method comprising: detecting at a predetermined position a recording medium fed from a sheet feed drive mechanism; variably setting a loop feed time to be counted; counting the loop feed time for defining a loop amount formed by said recording medium in accordance with an output of the detection; controlling the drive of the sheet feed drive mechanism by terminating a feeding operation in accordance with the counting of the loop feed time; variably setting a feed elapse time from a start of feeding from the sheet feed drive mechanism; counting the feed elapse time set; and determining the presence or absence of a feed jam in accordance with the counting of the feed elapse time and the output state of the detection.
Claim 47
Dependent Claim
39 words
A sheet feeding method according to claim 40, further comprising the step of selecting one of a plurality of feed drive mechanisms, wherein the feed elapse time is variably set in accordance with the selected sheet feed drive mechanism.
Claim 48
Dependent Claim
34 words
A sheet feeding method according to claim 40, further comprising the step of designating a material of the recording medium, wherein the feed elapse time is variably set in accordance with the material designation.
Claim 49
Dependent Claim
50 words
A sheet feeding method according to claim 40, further comprising the steps of: counting an elapsed time from the passage of the recording medium through the predetermined position in accordance with the detection at the predetermined position; and controlling a record sequence termination timing in accordance with the elapsed time.
Claim 50
Dependent Claim
53 words
A sheet feeding method according to claim 40, further comprising the steps of: counting an elapsed time from the passage through the predetermined position in accordance with the detection at the predetermined position; and controlling an automatic sheet ejection sequence for the recording medium in accordance with the counting of the elapsed time.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-17 | 2000-09-16 | 2001-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-17 | 2004-09-16 | 2005-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-17 | 2008-09-16 | 2009-03-18 | $7700.00 | Window Closed / Lapsed |