US3762813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Document feeder for electrostatic copier
Assignee: AB Dick Co
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Filing: 1972-02-16
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Granted: 1973-10-02
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Expires: 1992-02-16
Abstract
Abstract A copy machine including means for transporting an original to an exposure location, means for directing an image of the content of the original to a copying location and means for transporting individual copy sheets to the copying location. Switch means are provided for detecting the leading and trailing edges of the original and copy sheets with the sequence of operations being controlled by the condition of these switch means whereby maximum efficiency from the standpoint of feeding of originals and copy sheets can be accomplished. Engagement of switches with leading edges of the originals and copy sheets cooperates with a ''''ready'''' position provided for the originals whereby the copy sheets and originals can be moved in synchronism through the respective exposure and copying locations. The mechanisms are arranged so that both originals and copy sheets are obtained in page number sequence after completion of a continuous multiple copy operation whereby restacking of originals or copy sheets to conform to the initial stack of originals is not required. The withdrawal means for moving the originals from the exposure location are designed to achieve the proper restacking.
Inventors
- 👤 W Fowlie
- 👤 M Yoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:09
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6264; G03G; G03G15/00; G03G15/22; G03G15/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
238 words
In a copy machine including means for supporting a plurality of originals and a plurality of copy sheets, means for successively transporting originals to an exposure location, means for directing an image of the content of each original to a copying location, and means for transporting a copy sheet to said copying location whereby said sheet is exposed to said image, the improvement comprising an original switch, an original switch actuator located in the path of movement of said original to said exposure location, a copy switch, and a copy switch actuator located in the path of movement of said copy sheet to said copying location, said actuators being positioned for engagement by the trailing edges, respectively, of said original and said copy sheet for actuation of said switches, means connecting said original switch to said means for transporting an original toward the exposure location, and means connecting said copy switch to said means for transporting a copy sheet to said copying location, operation of said original switch by the trailing edge of an original serving to initiate the operation of said means for transporting the next original to the exposure location irrespective of the engagement of said copy switch by the trailing edge of said copy sheet, transporting of the next copy sheet to the copying location occurring only after engagement of both of said switches by said trailing edges and after transporting of the next original.
Claim 2
Dependent Claim
238 words
In a copy machine including means for supporting a plurality of originals and a plurality of copy sheets, means for successively transporting originals to an exposure location, means for directing an image of the content of each original to a copying location, and means for transporting a copy sheet to said copying location whereby said sheet is exposed to said image, the improvement comprising an original switch, an original switch actuator located in the path of movement of said original to said exposure location, a copy switch, and a copy switch actuator located in the path of movement of said copy sheet to said copying location, said actuators being positioned for engagement by the trailing edges, respectively, of said original and said copy sheet for actuation of said switches, means connecting said original switch to said means for transporting an original toward the exposure location, and means connecting said copy switch to said means for transporting a copy sheet to said copying location, operation of said original switch by the trailing edge of an original serving to initiate the operation of said means for transporting the next original to the exposure location irrespective of the engagement of said copy switch by the trailing edge of said copy sheet, transporting of the next copy sheet to the copying location occurring only after engagement of both of said switches by said trailing edges and after transporting of the next original.
Claim 3
Dependent Claim
96 words
A construction in accordance with claim 1 comprising an original ready position, said original transporting means moving the original to said ready position, means for holding said original at said ready position, and means for actuation of said copy switch by the leading edge of a copy shEet, said copy switch being connected to means for initiating continued transporting of said original from said ready position to said exposure location upon actuation of said copy switch whereby said original and said copy sheet move in synchronism upon engagement of said copy switch by said leading edge.
Claim 4
Dependent Claim
80 words
A construction in accordance with claim 1 wherein said original switch is positioned for engagement by the leading edge of an original, and means connecting said original switch to said means for transporting a copy sheet to said copying location whereby engagement of said original switch by the leading edge of an original will initiate movement of the next copy sheet toward said copying location if the trailing edge of the preceding copy sheet has already engaged said copy switch.
Claim 5
Dependent Claim
59 words
A construction in accordance with claim 2 including blocking means at said ready position for holding an original at the ready position, and means connecting said copy switch to said blocking means for moving said blocking means to an unblocking position relative to an original upon engagement of said copy switch by the leading edge of a copy sheet.
Claim 6
Dependent Claim
77 words
A construction in accordance with claim 2 wherein said copy switch includes first and copy actuating portions located in spaced relationship along the path of movement of a copy sheet, the first actuating portion being engageable by the leading edge of a copy sheet for initiating operation of the transporting means for an original to move the original from said stop position, and the trailing edge of a copy sheet being engageable with said second actuating portion.
Claim 7
Dependent Claim
15 words
A construction in accordance with claim 1 wherein said machine comprises an electrostatic copy machine.
Claim 8
Dependent Claim
127 words
In a copy machine including means for transporting an original to an exposure location, means for directing an image of the content of said original to a copying location, and means for transporting a copy sheet to said copying location whereby said sheet is exposed to said image, the improvement comprising an original ready position, the original transporting means moving the original to the ready position, a copy switch, an actuator for said copy switch engageable by the leading edge of said copy sheet during movement toward said copying location, and means for initiating continued movement of said original from said ready position to said exposure location upon actuation of said copy switch by said copy sheet whereby said original and said copy sheet move in synchronism.
Claim 9
Dependent Claim
127 words
In a copy machine including means for transporting an original to an exposure location, means for directing an image of the content of said original to a copying location, and means for transporting a copy sheet to said copying location whereby said sheet is exposed to said image, the improvement comprising an original ready position, the original transporting means moving the original to the ready position, a copy switch, an actuator for said copy switch engageable by the leading edge of said copy sheet during movement toward said copying location, and means for initiating continued movement of said original from said ready position to said exposure location upon actuation of said copy switch by said copy sheet whereby said original and said copy sheet move in synchronism.
Claim 10
Dependent Claim
75 words
A construction in accordance with claim 7 including an original switch located at said ready position, an original switch actuator, said original switch actuator being positioned for engagement by the leading edge of an original, and means connecting said original switch to said means for transporting a copy sheet toward said copy switch actuator whereby said copy sheet transporting means operates upon engagement of said original switch actuator by the leading edge of an original.
Claim 11
Dependent Claim
46 words
A construction in accordance with claim 8 wherein said original switch resets upon movement of the trailing edge of an original past the original switch actuator location, said resetting being adapted to initiate the operation of means for transporting the next original to the stop position.
Claim 12
Dependent Claim
101 words
A construction in accordance with claim 8 wherein said copy switch includes first and second actuating portions located in spaced relationship along the path of movement of said copy sheet, the leading edge of a copy sheet engaging the first actuating portion to thereby move the copy switch to a first position and the trailing edge of the copy sheet engaging said second actuating portion to move the copy switch to a second position, movement of the copy switch to the second position being adapted to initiate the operation of means for transporting the next original to the original stop position.
Claim 13
Dependent Claim
52 words
A construction in accordance with claim 10 wherein said means adapted to operate the copy sheet trAnsporting means upon engagement of the original switch by the leading edge of an original will operate only after the trailing edge of the preceding copy sheet passes the second actuating portion of the copy switch.
Claim 14
Dependent Claim
68 words
A construction in accordance with claim 8 wherein said copy switch and said original switch each include first and second positions, said switches being moved to the second positions by the trailing edges, respectively, of said copy sheet and said original, and wherein movement of the original switch to its second position serves to initiate operation of the means for transporting the next original to the ready position.
Claim 15
Dependent Claim
50 words
A construction in accordance with claim 7 including blocking means at said ready position for interrupting movement of an original, engagement of said copy switch by a copy sheet operating to move said blocking means to an unblocking position to thereby permit transporting of an original to said exposure location.
Claim 16
Dependent Claim
15 words
A construction in accordance with claim 7 wherein said machine comprises an electrostatic copying machine.
Claim 17
Dependent Claim
42 words
A construction in accordance with claim 7 including a slow-to-operate relay connected to an alarm system, said relay setting off the alarm system to reveal depleted copy sheets if the leading edge of a copy sheet fails to engage said copy switch.
Claim 18
Dependent Claim
39 words
A construction in accordance with claim 15 including an original switch at said ready position, said alarm system operating if said original switch is not engaged by the leading edge of an original thereby indicating a depletion of originals.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |