US3871640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-mode rotary duplicator
Assignee: Individual
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Filing: 1973-04-12
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Granted: 1975-03-18
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Expires: 1993-04-12
Abstract
Abstract A rotary duplicator receives copy sheets from a pair of cooperating feeding rollers. Larger first copy sheets are maintained at a first supply station, and smaller second copy sheets at a second supply station. A transporting arrangement transports copy sheets to the feeding rollers, first from one and then from an other of said stations.
Inventors
- 👤 Gerhard Ritzerfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:21
CPC Classifications
B; B65; B65H; B65H1/00; B65H1/02; B65H1/08; B65H1/10; B65H3/00; B65H3/44; B65H5/00; B65H5/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
398 words
In a rotary duplicator, a combination comprising a pair of cooperating feeding rollers adapted to receive copy sheets for forwarding of the same to a printing roller; a first supply station for supplying first copy sheets comprising a supply table adapted to contain a stack of said first copy sheets; a second supply station for supplying smaller second copy sheets located below said first supply station comprising a magazine having a first wall provided with an opening and a second wall movable toward said first wall, said magazine being adapted to contain a stack of said second copy sheets standing on edge and inclined into contact with a portion of said first wall so as to overlie said opening therein; first friction roller means located above said first supply station and engaging the uppermost one of said first copy sheets so as to contact and expel from said first supply station said uppermost one of said first copy sheets along a first path to said cooperating feeding rollers; second friction roller means extending through said opening into said magazine so as to contact and expel said second copy sheets consecutively along a second path towards said cooperating feeding rollers; third friction roller means located downstream of said second friction roller means along said second path so as to contact and guide the expelled second copy sheet towards said cooperating feeding rollers; transporting means including first drive means for driving said first friction roller means and second drive means for driving said second and third friction roller means; main control means including main coupling means between said second drive means and said second and third friction roller means and including switch means for actuating said first drive means and said main coupling means alternately so as to deliver to said cooperating feeding rollers first and second copy sheets alternately; and additional control means including additional coupling means between said second drive means and said second friction roller means and a sensor associated with said third friction roller means for sensing the presence or absence of a second copy sheet along said second path in the region Of said third friction roller means and operative for intermittently disengaging said additional coupling means subsequent to engagement of a second copy sheet by said second friction roller means but prior to engagement of the same second copy sheet by said feeding rollers.
Claim 2
Dependent Claim
398 words
In a rotary duplicator, a combination comprising a pair of cooperating feeding rollers adapted to receive copy sheets for forwarding of the same to a printing roller; a first supply station for supplying first copy sheets comprising a supply table adapted to contain a stack of said first copy sheets; a second supply station for supplying smaller second copy sheets located below said first supply station comprising a magazine having a first wall provided with an opening and a second wall movable toward said first wall, said magazine being adapted to contain a stack of said second copy sheets standing on edge and inclined into contact with a portion of said first wall so as to overlie said opening therein; first friction roller means located above said first supply station and engaging the uppermost one of said first copy sheets so as to contact and expel from said first supply station said uppermost one of said first copy sheets along a first path to said cooperating feeding rollers; second friction roller means extending through said opening into said magazine so as to contact and expel said second copy sheets consecutively along a second path towards said cooperating feeding rollers; third friction roller means located downstream of said second friction roller means along said second path so as to contact and guide the expelled second copy sheet towards said cooperating feeding rollers; transporting means including first drive means for driving said first friction roller means and second drive means for driving said second and third friction roller means; main control means including main coupling means between said second drive means and said second and third friction roller means and including switch means for actuating said first drive means and said main coupling means alternately so as to deliver to said cooperating feeding rollers first and second copy sheets alternately; and additional control means including additional coupling means between said second drive means and said second friction roller means and a sensor associated with said third friction roller means for sensing the presence or absence of a second copy sheet along said second path in the region Of said third friction roller means and operative for intermittently disengaging said additional coupling means subsequent to engagement of a second copy sheet by said second friction roller means but prior to engagement of the same second copy sheet by said feeding rollers.
Claim 3
Dependent Claim
38 words
A combination as defined in claim 1; further comprising wall means cooperating with said first wall and defining with the same gap dimensioned to permit the passage of only one of said second copy sheets at a time.
Claim 4
Dependent Claim
42 words
A combination as defined in claim 1; further comprising guide means mounting said magazine for movement in a path toward and away from said friction roller means; and pivot means mounting said magazine for pivotal movement into and out of said path.
Claim 5
Dependent Claim
25 words
A combination as defined in claim 1, and further comprising biasing means for biasing said second wall against said stack and toward said first wall.
Claim 6
Dependent Claim
15 words
A combination as defined in claim 1, wherein said transporting means comprises belt-drive transmission means.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |