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US3697302A Expired / Lapsed US ⏱️ 0.0 years remaining

Drum-photosensitive member and method for manufacturing thereof

Assignee: Canon Inc
•
Filing: 1969-09-02
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Granted: 1972-10-10
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Expires: 1989-09-02
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Abstract

Abstract A PHOTOSENSITIVE MEMBER HAVING A SMOOTH AND UNIFORM SURFACE PROVIDED BY COATING PHOTOSENSITIVE MATERIAL ON A DRUM IN UNIFORM THICKNESS. THE PRINCIPAL NOVEL METHOD COMPRISES ROTATING A CYLINDER ON ITS HORIZONTAL AXIS, PLACING A KNIFE EDGE OF A BLADE ALONG A CYLINDER GENERATING LINE OUTSIDE OF THE CYLINDER SURFACE, MAINTAINING A PREDETERMINED GAP BETWEEN THE KNIFE EDGE AND THE CYLINDER SURFACE, FACING THE KNIFE EDGE TO THE SURFACE, SUPPLYING A WET PHOTOSENSITIVE MATERIAL IN THE V-SHAPED SECTION FORMED BY THE UPPER SURFACE OF THE BLADE AND THE CYLINDER SURFACE, THEREBY COATING THE CYLINDER SURFACE THROUGH SAID GAP AND THEN TILTING THE BLADE TO BRING THE KNIFE EDGE TO A HIGHER POSITION THAN THE OPPOSITE EDGE OF THE BLADE SO AS TO CAUSE EXCESSIVE WET PHOTOSENSITIVE MATERIAL TO FLOW FROM THE DRUM OVER THE SURFACE OF THE BLADE TO LEAVE A UNIFORM COATING OF PHOTOSENSITIVE MATERIAL ON THE DRUM.

Inventors

  • 👤 Takashi Ihara
  • 👤 Takehiko Matsuo
  • 👤 Katsunobu Ohhara

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 11:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/02; G03G5/04; G03G5/05; G03G5/0525

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-10 1976-04-10 1976-10-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-10 1980-04-10 1980-10-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-10 1984-04-10 1984-10-10 $7700.00 Window Closed / Lapsed

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