US3704881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer sheet peeling device for xerographic apparatus
Assignee: Xerox Corp
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Filing: 1971-05-10
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Granted: 1972-12-05
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Expires: 1991-05-10
Abstract
Abstract Apparatus to remove the copy sheet from the photoconductive surface of a xerographic machine following transfer of the image thereto. The apparatus consists of a pressure manifold having at least one discharge orifice directed toward a separation point on the photoconductive surface downstream of the transfer station, a source of pressure air, a valve to regulate the admission of pressure air to the manifold, and control means to actuate the valve as the leading edge of the copy sheet approaches the separation point. To obtain accurate response, a photocell type sheet detector is used to detect the leading edge of the copy sheet.
Inventors
- 👤 Katsuhide Suda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:45
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A transfer sheet peeling device for xerographic apparatus consisting of a light source to project light beam onto a position on the surface of photosensitive drum where the transfer sheet is to be peeled from said surface, a photoelectric element to receive the reflected light of said light beam emitted from said light source, a solenoid valve to be opened by means of the output signal of said photoelectric element, an air reservoir holding compressed air supplied from a compressor at a determined pressure and releasing said compressed air when said solenoid valve is opened, and a manifold to blow compressed air released from said air reservoir through slit provided thereon thereby detecting optically the front end of the transfer sheet sticking on said photosensitive drum and peeling said sheet from said drum by means of the compressed air blown from said manifold.
Claim 2
Dependent Claim
143 words
A transfer sheet peeling device for xerographic apparatus consisting of a light source to project light beam onto a position on the surface of photosensitive drum where the transfer sheet is to be peeled from said surface, a photoelectric element to receive the reflected light of said light beam emitted from said light source, a solenoid valve to be opened by means of the output signal of said photoelectric element, an air reservoir holding compressed air supplied from a compressor at a determined pressure and releasing said compressed air when said solenoid valve is opened, and a manifold to blow compressed air released from said air reservoir through slit provided thereon thereby detecting optically the front end of the transfer sheet sticking on said photosensitive drum and peeling said sheet from said drum by means of the compressed air blown from said manifold.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |