US3907280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible sheet handling device
Assignee: Xerox Ltd
•
Filing: 1974-04-25
•
Granted: 1975-09-23
•
Expires: 1994-04-25
Abstract
Abstract A puffer for removing flexible sheets from a surface, comprising a plurality of air jet orifices that are spaced apart from one another, and a masking member mounted for movement to any one of a plurality of predetermined positions to selectively mask or uncover said orifices. In this way it is possible to ensure that air is puffed only over the paper-carrying part of an electrostatographic drum.
Inventors
- 👤 Dennis M Bendall
- 👤 William R Harris
- 👤 Jeffrey Kew
- 👤 Michael C Sherborne
- 👤 John A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; B; B65; B65H; B65H29/00; B65H29/54; B65H29/56; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
194 words
A puffer for removing flexible sheets from a surface, comprising a plurality of air jet orifices spaced apart from one another, and a masking member mounted for movement to any one of a plurality of predetermined positions, to selectively mask or uncover a selected number of said orifices, wherein said masking member includes masking portions, and uncovering portions in the form of apertures, the uncovering portions being of such dimensions as to uncover selected ones of said orifices by virtue of different dimensions of said uncovering portions, and wherein said masking member uncovering portions include in succession along said masking member a first group of one or more uncovering portions each of a width sufficient to uncover only one of said orifices, another group of one or more wider uncovering portions each of a width sufficient to uncover twice the width of one of said orifices, and a further group of one or more uncovering portions each of a greater width sufficient to uncover three or more times the width of one of said orifices, whereby on moving the masking member from one predetermined position to another, successively more of said orifices are uncovered.
Claim 2
Dependent Claim
194 words
A puffer for removing flexible sheets from a surface, comprising a plurality of air jet orifices spaced apart from one another, and a masking member mounted for movement to any one of a plurality of predetermined positions, to selectively mask or uncover a selected number of said orifices, wherein said masking member includes masking portions, and uncovering portions in the form of apertures, the uncovering portions being of such dimensions as to uncover selected ones of said orifices by virtue of different dimensions of said uncovering portions, and wherein said masking member uncovering portions include in succession along said masking member a first group of one or more uncovering portions each of a width sufficient to uncover only one of said orifices, another group of one or more wider uncovering portions each of a width sufficient to uncover twice the width of one of said orifices, and a further group of one or more uncovering portions each of a greater width sufficient to uncover three or more times the width of one of said orifices, whereby on moving the masking member from one predetermined position to another, successively more of said orifices are uncovered.
Claim 3
Dependent Claim
14 words
A puffer according to claim 1 wherein said orifices are in a straight line.
Claim 4
Dependent Claim
25 words
A puffer according to claim 2 wherein said masking member is a sliding member arranged for sliding movements in the direction of said straight line.
Claim 5
Dependent Claim
21 words
The puffer of claim 1 wherein said surface is an electrostatographic drum surface and said orifices extend across said drum surface.
Claim 6
Dependent Claim
58 words
A puffer according to claim 1 wherein said orifIces are in line and are masked in succession extending from one end of said line toward the other by said movement of said masking member in the direction of said line, and whereby said masking extends much further along said line than said corresponding movement of said masking member.
Claim 7
Dependent Claim
34 words
A puffer according to claim 1, wherein said orifices are spaced apart in the direction of movement of said masking member by a distance greater than the width of any of said uncovering portions.
Claim 8
Dependent Claim
58 words
A puffer according to claim 6, wherein said orifices are in line and are masked in succession extending from one end of said line toward the other by said movement of said masking member in the direction of said line, and whereby said masking extends much further along said line than said corresponding movement of said masking member.
References Cited (Backward Citations)
US3380733A
Cited
US3724760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |