Patent US4390175A successfully refreshed from Google Patents.
US4390175A
Expired / Lapsed
US
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Recording medium feeding device
Assignee: Canon Inc
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Filing: 1981-02-10
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Granted: 1983-06-28
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Expires: 2001-02-10
Abstract
Abstract A recording medium feeding device for use in an image formation instrument such as a printer, a copying apparatus or a recording apparatus. The feeding device has a recording medium supporting table, feed apparatus for feeding the recording mediums on the supporting table, and a drive system for vertically driving the supporting table. During supply of recording mediums, the supporting table is gradually lowered from a predetermined upper position as the recording mediums are supplied.
Inventors
- 👤 Yuji Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:50
CPC Classifications
B; B65; B65H; B65H1/00; B65H1/08; B65H1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A recording medium feeding device usable with an image formation apparatus, comprising: a recording medium stacking table; feed means for feeding recording mediums from said stacking table; drive means for raising and lowering said stacking table between a feeding position and a lower limit position; and control means for controlling said drive means to lower said table to a stand-by position between its feeding position and its lower limit position in response to a first signal indicating that a supply of recording mediums is required on said stacking table, and to raise said stacking table to its feeding position in response to a second signal indicating that said stacking table is supplied with recording mediums.
Claim 2
Dependent Claim
115 words
A recording medium feeding device usable with an image formation apparatus, comprising: a recording medium stacking table; feed means for feeding recording mediums from said stacking table; drive means for raising and lowering said stacking table between a feeding position and a lower limit position; and control means for controlling said drive means to lower said table to a stand-by position between its feeding position and its lower limit position in response to a first signal indicating that a supply of recording mediums is required on said stacking table, and to raise said stacking table to its feeding position in response to a second signal indicating that said stacking table is supplied with recording mediums.
Claim 3
Dependent Claim
28 words
A device according to claim 1, wherein means are provided for controlling said control means in response to opening of a door of the image formation apparatus body.
Claim 4
Dependent Claim
42 words
A device according to claim 1, wherein means are provided for controlling said control means whereby said stacking table is lowered to the position of a sensor provided at a predetermined position between the feeding and limit positions of said stacking table.
Claim 5
Dependent Claim
33 words
A device according to claim 3, wherein said control means is adapted to lower the topmost surface of the supplied recording mediums stacked on said supporting table to the position of said sensor.
Claim 6
Dependent Claim
17 words
A device according to claim 1, wherein on ON-OFF switch is provided to control said control means.
Claim 7
Dependent Claim
22 words
A device according to claim 1, wherein the lowering of said stacking table is terminated by detecting the lower limit position thereof.
Claim 8
Dependent Claim
26 words
A device according to claim 1, wherein said drive means includes a motor which is driven in forward direction or reverse direction by said control means.
Claim 9
Dependent Claim
24 words
A device according to claim 1, wherein said first signal is generated in response to movement of a door on the image formation apparatus.
References Cited (Backward Citations)
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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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |