Patent US4034977A successfully refreshed from Google Patents.
US4034977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detaching device for a sheet-shaped copy support
Assignee: Hoechst AG
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Filing: 1975-12-18
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Granted: 1977-07-12
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Expires: 1995-12-18
Abstract
Abstract A device for detaching a sheet-shaped copy support from a moving photoconductive layer by fluid pressure. The device includes a nozzle arrangement which directs pressurized fluid, such as compressed air, toward a sheet of copy paper or other copy support. The action of the fluid on the copy support creates a suction pressure which draws the copy support toward the nozzle arrangement to detach the copy support from the photoconductive layer. When the copy support has moved into close proximity and generally overlying relationship with respect to the nozzle arrangement, the fluid is passed off generally tangentially with respect to the copy support to maintain a constant suction and to avoid undesirable oscillations of the copy support. This, in turn, eliminates the undesirable noise associated with such oscillations.
Inventors
- 👤 Helmut Jahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
239 words
A device for detaching a sheet-shaped copy support from a moving photoconductive layer by fluid pressure, the detaching device comprising: a. a body having one side for cooperation with a copy support; b. a nozzle in said body, said nozzle having an outlet at said one side of said body; c. first directing means, operatively coupled with said nozzle, for directing flow of fluid from said nozzle so as to draw a copy support toward said one side of said body; d. second directing means, also operatively coupled with said nozzle, for directing flow of fluid away from the region of said nozzle outlet to discharge the fluid when a copy support has moved into close relationship with respect to said nozzle outlet; e. said second directing means including spacers arranged on both sides of said nozzle outlet for maintaining a copy support in spaced relation to said one side of said body; f. said spacers being elongated, straight elements arranged on said body in parallel relationship to one another and in oblique disposition with respect to the direction of transport of a copy support; g. said spacers comprising wires of a plastic material of a diameter of 1 mm or less disposed on said one side of said body; h. whereby the side of the copy support cooperating with the nozzle outlet is constantly subject to a pressure below atmospheric and oscillations of the copy support are prevented.
Claim 2
Independent Claim
239 words
A device for detaching a sheet-shaped copy support from a moving photoconductive layer by fluid pressure, the detaching device comprising: a. a body having one side for cooperation with a copy support; b. a nozzle in said body, said nozzle having an outlet at said one side of said body; c. first directing means, operatively coupled with said nozzle, for directing flow of fluid from said nozzle so as to draw a copy support toward said one side of said body; d. second directing means, also operatively coupled with said nozzle, for directing flow of fluid away from the region of said nozzle outlet to discharge the fluid when a copy support has moved into close relationship with respect to said nozzle outlet; e. said second directing means including spacers arranged on both sides of said nozzle outlet for maintaining a copy support in spaced relation to said one side of said body; f. said spacers being elongated, straight elements arranged on said body in parallel relationship to one another and in oblique disposition with respect to the direction of transport of a copy support; g. said spacers comprising wires of a plastic material of a diameter of 1 mm or less disposed on said one side of said body; h. whereby the side of the copy support cooperating with the nozzle outlet is constantly subject to a pressure below atmospheric and oscillations of the copy support are prevented.
Claim 3
Dependent Claim
16 words
A detaching device according to claim 1, wherein said wires have a diameter of 0.5 mm.
Claim 4
Dependent Claim
16 words
A detaching device according to claim 1, wherein the copy support is a sheet of paper.
Claim 5
Dependent Claim
29 words
A detaching device according to claim 1, including a plurality of nozzle outlets in said body, said first and second directing means being operatively coupled with each nozzle outlet.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |