US3672665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the feeding of sheets in copying machines or the like
Assignee: Agfa Gevaert AG
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Filing: 1970-11-09
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Granted: 1972-06-27
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Expires: 1990-11-09
Abstract
Abstract A device for the feeding of stacked sheets in a copying machine or the like has a reciprocable drawer which is mounted in the frame of the machine and is movable between an inserted and an extended position. The drawer supports a platform which serves to support a stack of sheets and is pivotably mounted in the drawer. The front part of the platform can be depressed by hand and is then engaged by spring-biased detent levers which are provided on the drawer to hold the front part in a lower position during the placing of a fresh stack onto the platform in extended position of the carriage. A spring biases the front part upwardly and is free to urge the topmost sheet of a freshly inserted stack against an intermittently driven feeding roller, which is mounted in the frame, when the drawer is returned to its inserted position. During such inward movement of the drawer, stops which are provided in the frame disengage the levers from the front part so that the latter can pivot under the action of the spring.
Inventors
- 👤 Gunther Schnall
- 👤 Herbert Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6502
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
In a device for feeding stacked sheets in a copying machine or the like, a combination comprising a support; a carriage mounted in said support; a stack-supporting platform mounted on said carriage, at least a portion of said platform being movable between a plurality of raised positions and a lower position and said carriage being movable with reference to said support between an extended position in which said platform is accessible for the placing of a stack of sheets thereon and an inserted position; biasing means provided on said carriage for constantly urging said portion of said platform from said lower position; detent means provided on said carriage for releasably holding said portion of said platform in said lower position in the extended position of said carriage; disengaging means provided in said support and located in the path of movement of said detent means to disengage the latter from said platform in response to movement of said carriage toward said inserted position; and sheet advancing means mounted on said support, said portion of said platform being disposed below said advancing means in the inserted position of said carriage so that the topmost sheet of a stack on said platform is caused to bear against said advancing means under the action of said biasing means.
Claim 2
Dependent Claim
214 words
In a device for feeding stacked sheets in a copying machine or the like, a combination comprising a support; a carriage mounted in said support; a stack-supporting platform mounted on said carriage, at least a portion of said platform being movable between a plurality of raised positions and a lower position and said carriage being movable with reference to said support between an extended position in which said platform is accessible for the placing of a stack of sheets thereon and an inserted position; biasing means provided on said carriage for constantly urging said portion of said platform from said lower position; detent means provided on said carriage for releasably holding said portion of said platform in said lower position in the extended position of said carriage; disengaging means provided in said support and located in the path of movement of said detent means to disengage the latter from said platform in response to movement of said carriage toward said inserted position; and sheet advancing means mounted on said support, said portion of said platform being disposed below said advancing means in the inserted position of said carriage so that the topmost sheet of a stack on said platform is caused to bear against said advancing means under the action of said biasing means.
Claim 3
Dependent Claim
149 words
A combination as defined in claim 1, wherein said platform has a front portion and a rear portion, as considered in the direction of movement of said carriage from sAid extended to said inserted position thereof, said front portion constituting said first mentioned portion of said platform and said advancing means comprising at least one intermittently driven roller so that the topmost sheet of the stack on said platform is caused to bear against said roller in the inserted position of said carriage and such topmost sheet is transported by said roller forwardly when the latter rotates, and further comprising a pair of corner separators provided on said carriage forwardly of said front portion and overlying the front corners of the topmost sheet of the stack on said platform, said corner separators being mounted on said carriage at a level slightly above the sheet which bears against said roller.
Claim 4
Dependent Claim
83 words
A combination as defined in claim 1, wherein said platform has a front portion and a rear portion, as considered in the direction of movement of said carriage from the extended toward the inserted posItion thereof, said front portion constituting said first mentioned portion of said platform and further comprising pivot means mounted on said carriage adjacent to said rear portion of the platform for pivotally supporting said platform for movement of said front portion between said lower position and said raised positions.
Claim 5
Dependent Claim
59 words
A combination as defined in claim 3, wherein said front portion is provided with at least one projection and said detent means comprises a device which engages with said projection and holds said front portion in response to movement of said front portion to said lower position when said carriage assumes a position other than said inserted position thereof.
Claim 6
Dependent Claim
24 words
A combination as defined in claim 4, wherein said detent means comprises at least one spring-biased lever which is pivotably mounted on said carriage.
Claim 7
Dependent Claim
49 words
A combination as defined in claim 5, wherein said disengaging means comprises a stop mounted in said support in the path of movement of said lever and arranged to pivot said lever away from engagement with said projection in response to movement of said carriage to said inserted position.
Claim 8
Dependent Claim
21 words
A combination as defined in claim 1, further comprising second detent means for releasably holding said carriage in said inserted position.
Claim 9
Dependent Claim
39 words
A combination as defined in claim 1, wherein said carriage is reciprocable between said inserted and extended positions thereof, and further comprising cooperating guide means provided on said carriage and said support for confining the carriage to reciprocatory movement.
Claim 10
Dependent Claim
43 words
A combination as defined in claim 8, wherein said guide means comprises at least one guide rail provided on one of the parts including said support and said carriage and guide rolls tracking said rail and provided on the other of said parts.
Claim 11
Dependent Claim
23 words
A combination as defined in claim 2, wherein the distance between the topmost sheet and said level is between 0.1 and 0.5 millimeter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |