Patent US3885786A successfully refreshed from Google Patents.
US3885786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stripper finger
Assignee: Xerox Corp
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Filing: 1973-04-25
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Granted: 1975-05-27
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Expires: 1993-04-25
Abstract
Abstract Stripping apparatus for stripping electrostatically tacked copy sheet from a xerographic drum in which a stripping finger is positioned on a pivot axis to extend tangentially to the drum surface with the tip portion of the finger extending a predetermined extent from the drum surface. A counterweight is mounted on the opposite side of the pivot axis to edge the finger into a low pressure riding contact with the drum surface to effect stripping of the copy sheet from the drum surface at very low compressible stresses and without abrading the drum surface. The finger pivot is arranged to absorb most of the impact of stripping. To effect this, the bearing area at the center of the pivot is kept to a minimum to enable the finger to be self aligning, thereby equalizing pressure while the finger is maintained in contact with the drum surface. The counter-weight is adjustable for varying the pressure of the finger member against the drum surface.
Inventors
- 👤 Herbert F Schmalzbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:45
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: 4
Claim 1
Independent Claim
164 words
In a xerographic copying apparatus wherein an insulating copy sheet is electrostatically tacked to a moving xerographic drum image bearing surface, an improved stripping apparatus for removing the tacked copy sheet from the moving drum surface comprising a frame, a support member mounted about a pivot axis on said frame, an elongated finger member mounted on said support member extending tangentially to the drum surface with its tip portion extending a predetermined extent beyond the point of tangency, counterweight means mounted on said support member on a side of said pivot axis opposite said finger member to urge said finger member into low pressure riding contact with the drum surface whereby the copy sheet is stripped from the drum surface at very low compressive stresses, wherein the support member is formed with a counter-bore opening about the pivot axis to present a minimum of pivot bearing surface to effect self aligning of the finger member at the line of contact with the drum surface.
Claim 2
Dependent Claim
164 words
In a xerographic copying apparatus wherein an insulating copy sheet is electrostatically tacked to a moving xerographic drum image bearing surface, an improved stripping apparatus for removing the tacked copy sheet from the moving drum surface comprising a frame, a support member mounted about a pivot axis on said frame, an elongated finger member mounted on said support member extending tangentially to the drum surface with its tip portion extending a predetermined extent beyond the point of tangency, counterweight means mounted on said support member on a side of said pivot axis opposite said finger member to urge said finger member into low pressure riding contact with the drum surface whereby the copy sheet is stripped from the drum surface at very low compressive stresses, wherein the support member is formed with a counter-bore opening about the pivot axis to present a minimum of pivot bearing surface to effect self aligning of the finger member at the line of contact with the drum surface.
Claim 3
Dependent Claim
136 words
In a xerographic copying apparatus wherein an insulating copy sheet is electrostatically tacked to a moving xerographic drum image bearing surface, an improved stripping apparatus for removing the tacked copy sheet from the moving drum surface comprising a frame, a support member pivotally supported on said frame, an elongated finger member mounted on said support member extending tangentially to the drum surface with its tip portion extending a predetermined extent beyond the point of tangency, counterweight means mounted on said support member on a side opposite said finger to urge said finger into low pressure riding contact with the drum surface whereby the copy sheet is stripped from the drum surface at very low compressive stresses; wherein said counterweight means includes a threaded member for adjusting the pressure of the finger member against the drum surface.
Claim 4
Dependent Claim
136 words
In a xerographic copying apparatus wherein an insulating copy sheet is electrostatically tacked to a moving xerographic drum image bearing surface, an improved stripping apparatus for removing the tacked copy sheet from the moving drum surface comprising a frame, a support member pivotally supported on said frame, an elongated finger member mounted on said support member extending tangentially to the drum surface with its tip portion extending a predetermined extent beyond the point of tangency, counterweight means mounted on said support member on a side opposite said finger to urge said finger into low pressure riding contact with the drum surface whereby the copy sheet is stripped from the drum surface at very low compressive stresses; wherein said counterweight means includes a threaded member for adjusting the pressure of the finger member against the drum surface.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |