US3880518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating developer platen for reproduction apparatus
Assignee: Xerox Corp
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Filing: 1974-06-21
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Granted: 1975-04-29
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Expires: 1994-06-21
Abstract
Abstract A floating platen is provided in a reproduction apparatus employing an endless belt-type photoconductor, the platen being provided opposite the apparatus developing mechanism, and having means to dispose the belt into a substantially flat condition. The platen is supported for limited floating movement between preset limits, and the developing mechanism itself, which is also capable of limited displacement, is located off of the platen. In this way, unwarranted displacement of either platen or the developing mechanism is accommodated without affecting or changing the critical operating spacing therebetween. As a further arrangement, automatic signal means are provided to indicate the positional relationship between the developing mechanism and the platen.
Inventors
- 👤 Peter A Chatfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0896
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
In a reproduction machine of the type incorporating a movable, flexible web having a photoconductive surface on which a latent electrostatic image of the original being copied is formed and developed, support means for said web including an internal frame member, plural support rollers for said web rotatably mounted on said frame member for supporting and guiding said web in an endless path of movement, a platen for said web disposed between a pair of said rollers, the surface of said platen facing said web being substantially flat, and means to tension said web whereby to draw said web against said platen surface to provide a substantially flat run whereat an image on said web may be developed, the improvement comprising: means for mounting said platen on said frame member for limited movement relative thereto whereby on unwarranted displacement of said frame member said platen may move relative thereto to retain said platen in operative contact with said web; and bias means for resiliently urging said platen against said web.
Claim 2
Dependent Claim
170 words
In a reproduction machine of the type incorporating a movable, flexible web having a photoconductive surface on which a latent electrostatic image of the original being copied is formed and developed, support means for said web including an internal frame member, plural support rollers for said web rotatably mounted on said frame member for supporting and guiding said web in an endless path of movement, a platen for said web disposed between a pair of said rollers, the surface of said platen facing said web being substantially flat, and means to tension said web whereby to draw said web against said platen surface to provide a substantially flat run whereat an image on said web may be developed, the improvement comprising: means for mounting said platen on said frame member for limited movement relative thereto whereby on unwarranted displacement of said frame member said platen may move relative thereto to retain said platen in operative contact with said web; and bias means for resiliently urging said platen against said web.
Claim 3
Dependent Claim
51 words
The reproduction machine of claim 1 including developer means opposite said web flat surface for developing images on said web, said developer means including a developer housing, and means for locating said developer housing against said platen whereby movement of said platen is accompanied by conjoint movement of said developer housing.
Claim 4
Dependent Claim
22 words
The reproduction machine according to claim 2 incluDing spacer means for maintaining said developer housing in predetermined, spaced relationship to said platen.
Claim 5
Dependent Claim
40 words
The reproduction machine according to claim 3 in which said platen mounting means is adjustable to enable said platen to be moved relative to said frame member while retaining the predetermined, spaced relationship between said platen and said developer housing.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |