Patent US4579447A successfully refreshed from Google Patents.
US4579447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy paper feeding device to transfer portion in an electrophotographic copying machine
Assignee: Sharp Corp
•
Filing: 1984-02-10
•
Granted: 1986-04-01
•
Expires: 2004-02-10
Abstract
Abstract An electrophotographic copying machine comprises a feeding device for feeding a copy paper to a circular photoreceptor for forming an electrostatic latent image thereon, a transfer discharger for causing a corona discharge to transfer the latent image onto the copy paper, and a receiving device for receiving the copy paper posterior to the corona transfer. The copy paper is traversed along a tangent line of the transfer portion of the circular photoreceptor, the tangent line extending substantially in a line through the feeding device, the corona discharger, and the receiving device. The copy paper may be selected to be thick or thin. The thick copy paper can be automatically separated from the circular photoreceptor without the aid of any separation means.
Inventors
- 👤 Itsurou Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A device in an electrophotographic copying machine for feeding a copy paper to a circular photoreceptor means for forming an electrostatic latent image thereon, having a transfer means for transferring toner particles used to develop said latent image from a transfer portion of the circular photoreceptor means onto the copy paper, the improvement comprising: providing a guide means for forwarding said copy paper to said circular photoreceptor means; and a receiving means following said guide means for receiving said copy paper after passing said transfer means; said copy paper being transferred along a path in a plane tangent at the transfer portion of said photoreceptor means, said transfer path extending substantially in a line through said guide means, said transfer means, and said receiving means, said receiving means comprising a roller provided with a large-diameter portion and a small-diameter portion for transferring both thin and thick copy paper, respectively.
Claim 2
Independent Claim
149 words
A device in an electrophotographic copying machine for feeding a copy paper to a circular photoreceptor means for forming an electrostatic latent image thereon, having a transfer means for transferring toner particles used to develop said latent image from a transfer portion of the circular photoreceptor means onto the copy paper, the improvement comprising: providing a guide means for forwarding said copy paper to said circular photoreceptor means; and a receiving means following said guide means for receiving said copy paper after passing said transfer means; said copy paper being transferred along a path in a plane tangent at the transfer portion of said photoreceptor means, said transfer path extending substantially in a line through said guide means, said transfer means, and said receiving means, said receiving means comprising a roller provided with a large-diameter portion and a small-diameter portion for transferring both thin and thick copy paper, respectively.
Claim 3
Dependent Claim
20 words
The device of claim 1, further comprising a separation means for separating said thin copy paper from said photoreceptor means.
Claim 4
Dependent Claim
29 words
The device of claim 1, wherein said receiving means deviates from the exact linear path defined by said plane tangent at said transfer portion of said circular photoreceptor 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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |