US3825338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system with selectable feeds
Assignee: AB Dick Co
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Filing: 1972-10-12
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Granted: 1974-07-23
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Expires: 1992-10-12
Abstract
Abstract A duplicating machine which accepts original documents either in a flow-feed mode in which the documents move across the illumination station of an optical system in one direction only or in a platen-feed mode in which three-dimensional documents such as books are transported relative to the same illumination station in feed and return directions by a reciprocable carrier or platen. The mechanism for flow-feed is also mounted on the carrier or platen. The optical system casts an image of a portion of the original document or all of the document on a photoconductive drum. By means of a novel drive system, movement of the documents is accurately synchronized with movement of the drum on which they are imaged, to produce high image resolution even when the dual feed mechanism is employed in a progressively scanning optical system.
Inventors
- 👤 J Kolibas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:44
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/6221; G03B27/6235
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
Copying apparatus comprising optical image forming means having an input illumination station and an output image station, first means for document feeding comprising carriage means supporting a document and reciprocable for moving a supported document to and from said illumination station by moving said carriage means and said supported documenT together, alternative means for document feeding contemporaneously mounted on said apparatus with said first means for document feeding said alternative means having means for engaging a document and movable in continuous fashion for moving such engaged document relative to said first means, power means and said illumination station for alternatively driving said first feed means or said alternative feed means, selection apparatus for alternatively associating either said first means of document feeding or said second means of document feeding with said power means, and means located at said output image station for receiving an image of the document.
Claim 2
Dependent Claim
148 words
Copying apparatus comprising optical image forming means having an input illumination station and an output image station, first means for document feeding comprising carriage means supporting a document and reciprocable for moving a supported document to and from said illumination station by moving said carriage means and said supported documenT together, alternative means for document feeding contemporaneously mounted on said apparatus with said first means for document feeding said alternative means having means for engaging a document and movable in continuous fashion for moving such engaged document relative to said first means, power means and said illumination station for alternatively driving said first feed means or said alternative feed means, selection apparatus for alternatively associating either said first means of document feeding or said second means of document feeding with said power means, and means located at said output image station for receiving an image of the document.
Claim 3
Dependent Claim
77 words
Copying apparatus as set forth in claim 1 wherein the means for receiving an image of the document is a cylinder and in which the power means for alternatively driving said first document feed means and said alternative document feed means includes a gear driving said cylinder at a rotary speed such that its surface speed is synchronized with either document feed means to provide an accurate reproduction of the document on the surface of the drum.
Claim 4
Dependent Claim
43 words
Copying apparatus as set forth in claim 2 in which the power means includes, meshing with the cylinder gear and driven thereby, a first gear arranged to drive said carriage means and a second gear arranged to drive said alternative document feeding means.
Claim 5
Dependent Claim
74 words
Copying apparatus as set forth in claim 3 in which said first gear is connected to a first drive shaft for driving the carriage means in a scanning direction, and also drives a gear meshing with a gear connected to a second drive shaft for driving the carriage means in a return direction, and in which clutch means are associated with each shaft whereby the carriage means may be driven alternately in opposite directions.
Claim 6
Dependent Claim
49 words
Copying apparatus as set forth in claim 4 in which the gear ratios between the first drive shaft and the carriage means and the second drive shaft and the carriage means are such that the carriage means is returned at higher speed than its speed in the scanning direction.
Claim 7
Dependent Claim
98 words
Copying apparatus as set forth in claim 2 in which there are provided alternate means for driving the cylinder at a normal scanning speed for copying and at a higher speed for duplicating, and means connecting the normal speed drive with both the cylinder and either one of the document feed means, and for disconnecting the cylinder drive from both document feed means simultaneously, whereby the cylinder can be selectively driven at scanning speed in association with one or the other of said document feed means, or at the higher duplicator speed disconnected from both document feed means.
Claim 8
Independent Claim
172 words
An apparatus for copying documents comprising a frame, a document feed station for receiving a document, and means defining a document illumination station and a sheet exit station, a platen supported on the frame for reciprocating movement between said document feed station and said illumination station to carry a document to be copied from said feed station to said illumination station and return, sheet transport means carried on said frame contemporaneously with said platen and operative alternatively with respect thereto for receiving a document sheet at said feed station and transporting such received document sheet relative to said platen from said feed station to said illumination station and then to said sheet exit station, and drive means connectable with said transport means and operable for unidirectionally driving said transport means to move a document sheet relative to said platen from said feed station to said illumination and exit stations in sequence, and disconnectable from said sheet transport means to permit reciprocation of said platen between said feed station and said illumination station.
Claim 9
Independent Claim
172 words
An apparatus for copying documents comprising a frame, a document feed station for receiving a document, and means defining a document illumination station and a sheet exit station, a platen supported on the frame for reciprocating movement between said document feed station and said illumination station to carry a document to be copied from said feed station to said illumination station and return, sheet transport means carried on said frame contemporaneously with said platen and operative alternatively with respect thereto for receiving a document sheet at said feed station and transporting such received document sheet relative to said platen from said feed station to said illumination station and then to said sheet exit station, and drive means connectable with said transport means and operable for unidirectionally driving said transport means to move a document sheet relative to said platen from said feed station to said illumination and exit stations in sequence, and disconnectable from said sheet transport means to permit reciprocation of said platen between said feed station and said illumination station.
Claim 10
Dependent Claim
65 words
Copying apparatus in accordance with claim 7 in which said sheet transport means comprises sheet forwarding rollers mounted on said platen and movable therewith, said rollers being operatively connectable with said drive mEans and effective to forward documents only when said platen is inactive, and being disconnectable from said drive means so as to be inactive when said platen is connected to said drive means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |