Patent US4566787A successfully refreshed from Google Patents.
US4566787A
Expired / Lapsed
US
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Photocopying machine
Assignee: LULLAU ROLF
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Filing: 1984-01-18
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Granted: 1986-01-28
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Expires: 2004-01-18
Abstract
Abstract A photocopying machine with a guide gap (20) formed between a plane rigid and light-transmitting plate (11) and a flexible cellular plate (7, 8). The flexible cellular plate is formed by an extremely low-friction flexible film (8) supported by a layer of flexible foam synthetic resin (7). The rigid plate (11) is covered by an extremely low-friction film (15). A pair of driving rollers (17,18) located on the introduction side and, if appropriate, a pair of driving rollers (24, 25) located on the outlet side serve exclusively as a feed element. The guide gap (20) directly adjoins the roller gap (19) of the pair of driving rollers (17, 18) located on the introduction side, because the parts forming the guide gap and in the form of a plurality of tongues (23) engaging into grooves (22) of the driving rollers (17, 18) are guided through the pair of driving rollers up to the introduction side (5, 13). A developing unit designed on the same construction principle can follow. To achieve longer exposure lengths, several photocopying units can be connected in succession.
Inventors
- 👤 Georg Lullau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:44
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A photocopying machine comprising a plain rigid light-transmitting plate (11), a flexible cellular plate (7) spaced from the light-transmitting plate to form a guide gap (20) therebetween, the surfaces forming the guide gap consisting of extremely low-friction material, feed elements comprising a pair of driving rollers (17, 18) for feeding copy material to the guide gap, said driving rollers forming a roller gap (19) therebetween and having peripheral grooves (22) selectively enlarging portions of the roller gap, and guide gap extenders (4, 12) having tongues (5, 13) projecting through said roller gap at said grooves, said tongues on opposite sides of said guide gap being spaced sufficiently for introducing copy material to said roller gap, said cellular plate including a flexible film (8) and flexible supporting means urging said film toward the light-transmitting plate over its entire surface.
Claim 2
Dependent Claim
138 words
A photocopying machine comprising a plain rigid light-transmitting plate (11), a flexible cellular plate (7) spaced from the light-transmitting plate to form a guide gap (20) therebetween, the surfaces forming the guide gap consisting of extremely low-friction material, feed elements comprising a pair of driving rollers (17, 18) for feeding copy material to the guide gap, said driving rollers forming a roller gap (19) therebetween and having peripheral grooves (22) selectively enlarging portions of the roller gap, and guide gap extenders (4, 12) having tongues (5, 13) projecting through said roller gap at said grooves, said tongues on opposite sides of said guide gap being spaced sufficiently for introducing copy material to said roller gap, said cellular plate including a flexible film (8) and flexible supporting means urging said film toward the light-transmitting plate over its entire surface.
Claim 3
Dependent Claim
38 words
A photocopying machine as claimed in claim 1, wherein the flexible supporting means (7) is a layer of foam synthetic resin which is supported essentially over its entire surface on the side facing away from the film (8).
Claim 4
Dependent Claim
39 words
A photocopying machine as claimed in claim 1, wherein the surface of the plane plate (11) is covered by a film (15) which consists, at least on its side facing the guide gap (20), of the extremely low-friction plastic.
Claim 5
Dependent Claim
28 words
A photocopying machine as claimed in claim 1, wherein the flexible film (8) consists, at least on its side facing the guide gap, of the extremely low-friction plastic.
Claim 6
Dependent Claim
26 words
A photocopying machine as claimed in claim 1, wherein the grooves (22) formed in the pair of driving rollers (17, 18) are located opposite one another.
Claim 7
Dependent Claim
103 words
A photocopying machine as claimed in claim 1 wherein the surface of the light-transmitting plate (11) is covered by a film (15) which consists, at least on its side facing the guide gap (20), of an extremely low-friction plastic, and said flexible film (8) of the cellular plate also consists, at least on its side facing the guide gap of the extremely low-friction plastic, said grooves (22) formed in the driving rollers (17, 18) being located opposite one another, a portion of the low-friction material of said films (8, 15) forming the surface of the guide gap (20) extending over said tongues (23).
Claim 8
Dependent Claim
27 words
A photocopying machine as claimed in one of claims 1, wherein several photocopying units are connected in succession, with pairs of driving rollers being between the units.
Claim 9
Dependent Claim
51 words
A photocopying machine as claimed in claim 7, wherein the films forming the guide gap surface in the successive photocopying units are each made in one piece through all the photocopying units, with cut-outs for the passage of the effective regions, located between the peripheral grooves, of the pairs of rollers.
Claim 10
Dependent Claim
69 words
A photocopying machine as claimed in claim 1 (1 or 2) wherein an additional film consisting of extremely low-friction plastic is contained between the guide-gap surfaces to form two separate guide gap portions, one of said gap portions being suited for receiving an original sheet and the second portion being suited for receiving a sheet of copying material, said additional film projecting through said roller gap at said grooves.
Claim 11
Dependent Claim
97 words
A photocopying machine as claimed in claim 1 including a developing device having a pair of extremely low-friction films (37, 38) forming a developing guide gap (36) for receiving the material to be developed, a developing feed element including a pair of developer drive rollers (24, 27) located on the upstream side of said developing gap, one of said films being perforated and the other of said film being supported by a layer of flexible foam synthetic resin (39) which is itself supported essentially over its entire surface and a developing compartment communicating with said perforated film.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |