US4554592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
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Filing: 1983-10-20
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Granted: 1985-11-19
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Expires: 2003-10-20
Abstract
Abstract An image forming apparatus capable of eliminating unnecessary images other than the original image has a solid-state scanning device for reading an original and providing corresponding image information, a recording unit for recording on a recording sheet according to said image information, identifying unit for identifying the size of the original according to the output signals from said solid-state scanning device, and selector for selecting a recording sheet in said recording unit according to the identified size of the original.
Inventors
- 👤 Tadashi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:34
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00681; H04N1/00684; H04N1/00708; H04N1/00729; H04N1/00734; H04N1/00737; H04N1/00742; H04N1/00748; H04N1/0075; H04N1/00763; H04N1/00774; H04N1/00779; H04N1/32; H04N1/333; H04N2201/00; H04N2201/32; H04N2201/333; H04N2201/33307; H04N2201/33314; H04N2201/33321
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
124 words
An image reading apparatus comprising: means for reading an original and for producing an image signal as an output, said reading means comprising at least one scanning device in relative movement relation with the original in an auxiliary scanning direction perpendicular to a main scanning direction, said scanning device being adapted to perform a scanning in the main scanning direction; detecting means responsive to the output from said reading means for detecting the left and right edges of the original in the main scanning direction; means for measuring the time of detection of the left and right edges of the original by said detecting means; and means for identifying the size of the original in accordance with the measurement result of said measuring means.
Claim 2
Dependent Claim
124 words
An image reading apparatus comprising: means for reading an original and for producing an image signal as an output, said reading means comprising at least one scanning device in relative movement relation with the original in an auxiliary scanning direction perpendicular to a main scanning direction, said scanning device being adapted to perform a scanning in the main scanning direction; detecting means responsive to the output from said reading means for detecting the left and right edges of the original in the main scanning direction; means for measuring the time of detection of the left and right edges of the original by said detecting means; and means for identifying the size of the original in accordance with the measurement result of said measuring means.
Claim 3
Dependent Claim
20 words
An image reading apparatus according to claim 1, further comprising means for displaying the identification result of said identifying means.
Claim 4
Dependent Claim
42 words
An image reading apparatus according to claim 1, wherein said detecting means detects the edges of the original by the change of the image signal from said reading means to one indicative of white followed by termination of the white indicating signal.
Claim 5
Dependent Claim
38 words
An image reading apparatus according to claim 1, further comprising means for storing the image signal produced by said reading means and means for controlling said storing means in accordance with the identification result of said identifying means.
Claim 6
Dependent Claim
30 words
An image reading apparatus according to claim 1, wherein the size identification of said identifying means is performed at the same time as the original reading of said reading means.
Claim 7
Dependent Claim
29 words
An image reading apparatus according to claim 1, further comprising means for recording an image on a recording sheet according to the image signal produced by said reading means.
Claim 8
Dependent Claim
26 words
An image reading apparatus according to claim 6, wherein said recording means operates the image recording in accordance with the identification result of said identifying means.
Claim 9
Dependent Claim
38 words
An image reading apparatus according to claim 6, wherein said measuring means includes means for counting clock signals for use in driving said scanning device, and measures the time based on the value counted by said counting means.
Claim 10
Dependent Claim
78 words
An image reading apparatus comprising: means for reading an original and for producing an image signal as output, said reading means comprising at least one scanning device in relative movement relation with the original; means for counting clock signals synchronized with pixel outputs from said scanning device; and means for detecting the size of the original based on the value counted by said counting means when said reading means reads the left and right edges of the original.
Claim 11
Dependent Claim
78 words
An image reading apparatus comprising: means for reading an original and for producing an image signal as output, said reading means comprising at least one scanning device in relative movement relation with the original; means for counting clock signals synchronized with pixel outputs from said scanning device; and means for detecting the size of the original based on the value counted by said counting means when said reading means reads the left and right edges of the original.
Claim 12
Dependent Claim
20 words
An image reading apparatus according to claim 9, further comprising means for storing the value counted by said counting means.
Claim 13
Dependent Claim
30 words
An image reading apparatus according to claim 9, wherein the size detection of said detecting means is performed at the same time as the original reading of said reading means.
Claim 14
Dependent Claim
24 words
An image reading apparatus according to claim 9, wherein said counting means is adapted to count the clock signals for driving said scanning device.
Claim 15
Dependent Claim
27 words
An image reading apparatus according to claim 9, further comprising means for identifying the edges of the original according to the output signals from said reading means.
Claim 16
Dependent Claim
29 words
An image reading apparatus according to claim 9, further comprising means for recording an image on a recording sheet according to the image signal produced by said reading means.
Claim 17
Dependent Claim
21 words
An image reading apparatus according to claim 9, further comprising a cover which is different from the original in light reflectivity.
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |