Patent US3936181A successfully refreshed from Google Patents.
US3936181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying machines
Assignee: Ozalid Group Holdings Ltd
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Filing: 1973-10-10
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Granted: 1976-02-03
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Expires: 1993-10-10
Abstract
Abstract A photocopying machine including a device for reorientating an original circulating through the machine for multiple copying. The device consists of a row of microswitches extending transversely to the direction of travel of the original, each microswitch being arranged, when contacted by the sheet before another sheet, to apply a brake to the sheet at a location behind it until the sheet has been reorientated sufficiently to contact other microswitches.
Inventors
- 👤 Frank Arthur Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:58
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/10; G03B27/12; B; B65; B65H; B65H7/00; B65H7/02; B65H7/06; B65H7/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
In a photocopying machine having a sheet feeding mechanism for circulating an original through the machine to enable a plurality of copies to be made in succession upon individual copy sheets from said original, wherein the improvement comprises: a. a plurality of microswitches aligned in a row extending transversely to the direction of feed of the original by said sheet feeding mechanism and arranged for contact with the leading edge of the original; b. a plurality of correspondingly aligned normally inoperative solenoid operated brakes respectively disposed behind the individual microswitches in the direction of travel of the original; and c. an electrical control circuit operative in response to contact of the leading edge of the original with any one microswitch prior to contact of said leading edge with any other microswitch to cause the solenoid of the brake disposed behind the contacted microswitch to apply said brake to the original, and in response to subsequent contact of said leading edge with another microswitch, to cause said solenoid to disengage said brake from the original, thereby aligning the leading edge of said original with said microswitches.
Claim 2
Dependent Claim
185 words
In a photocopying machine having a sheet feeding mechanism for circulating an original through the machine to enable a plurality of copies to be made in succession upon individual copy sheets from said original, wherein the improvement comprises: a. a plurality of microswitches aligned in a row extending transversely to the direction of feed of the original by said sheet feeding mechanism and arranged for contact with the leading edge of the original; b. a plurality of correspondingly aligned normally inoperative solenoid operated brakes respectively disposed behind the individual microswitches in the direction of travel of the original; and c. an electrical control circuit operative in response to contact of the leading edge of the original with any one microswitch prior to contact of said leading edge with any other microswitch to cause the solenoid of the brake disposed behind the contacted microswitch to apply said brake to the original, and in response to subsequent contact of said leading edge with another microswitch, to cause said solenoid to disengage said brake from the original, thereby aligning the leading edge of said original with said microswitches.
Claim 3
Dependent Claim
43 words
A machine as claimed in claim 1, wherein each solenoid-operated brake comprises a wheel rotatable about an axis normal to the direction of travel of the original and adapted to be lowered onto the original upon activation of the solenoid of said brake.
Claim 4
Dependent Claim
56 words
A machine as claimed in claim 1, which includes a cut-out microswitch located behind said row of microswitches and laterally offset therefrom, said control circuit including means operative in response to contact of the leading edge of the original with said cut-out microswitch to disconnect from said control circuit all of the microswitches in said row.
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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |