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US4763174A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnification selecting device in a photocopier

Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1986-10-23
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Granted: 1988-08-09
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Expires: 2006-10-23
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Abstract

Abstract A magnification selecting device which is capable of continuously varying magnifications by operating either UP or DOWN key and also slowing down the speed of varying mangifications only when these magnifications are in a position close to the predetermined magnification.

Inventors

  • 👤 Yoshinori Makiura
  • 👤 Takahiro Wakikaido
  • 👤 Haruo Yamamoto
  • 👤 Shusaku Ogawa
  • 👤 Takao Ichihashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 04:54
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5016; G03G15/502

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 226 words
In a photocopier including a magnification level indicator, an up control key for increasing the magnification level indication of the magnification level indicator with a fixed rate of increase, a down control key for reducing the magnification level indication of the magnification level indicator with a fixed rate of decrease, and copying means for providing a photocopy of an original document at the magnification level indicated by the magnification level indication of the magnification level indicator, the improvement comprising: first means, responsive to actuation of the up control key, for determining the amount by which the magnification level indication differs from a predetermined magnification level indication; second means, responsive to determination by said first means that the magnification level indication is less than the predetermined magnification level indication by a predetermined amount, for causing the magnification level indication to increase with a rate of increase less than the fixed rate of increase; third means, responsive to actuation of the down control key, for determining the amount by which the magnification level indication differs from the predetermined magnification level indication; and fourth means, responsive to determination by said third means that the magnification level indication is greater than the predetermined magnification level indication by a predetermined amount, for causing the magnification level indication to decrease with a rate of decrease less than the fixed rate of decrease.
Claim 2
Dependent Claim 226 words
In a photocopier including a magnification level indicator, an up control key for increasing the magnification level indication of the magnification level indicator with a fixed rate of increase, a down control key for reducing the magnification level indication of the magnification level indicator with a fixed rate of decrease, and copying means for providing a photocopy of an original document at the magnification level indicated by the magnification level indication of the magnification level indicator, the improvement comprising: first means, responsive to actuation of the up control key, for determining the amount by which the magnification level indication differs from a predetermined magnification level indication; second means, responsive to determination by said first means that the magnification level indication is less than the predetermined magnification level indication by a predetermined amount, for causing the magnification level indication to increase with a rate of increase less than the fixed rate of increase; third means, responsive to actuation of the down control key, for determining the amount by which the magnification level indication differs from the predetermined magnification level indication; and fourth means, responsive to determination by said third means that the magnification level indication is greater than the predetermined magnification level indication by a predetermined amount, for causing the magnification level indication to decrease with a rate of decrease less than the fixed rate of decrease.
Claim 3
Dependent Claim 36 words
The improvement of claim 1, further comprising a fixed magnification level control key for setting the magnification level indication of the magnification level indicator to a magnification level indication differing from the predetermined magnification level indication.
Claim 4
Dependent Claim 30 words
The improvement of claim 1, further comprising a fixed magnification level control key for setting the magnification level indication or the magnification level indicator to the predetermined magnification level indication.

References Cited (Backward Citations)

US3002422A Cited
US4417281A Cited
US4531831A Cited
EP0080577B1 Cited
EP0127867B1 Cited
US4611909A Cited
US4555165A Cited
US4618252A Cited
US4624552A Cited
US4647191A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-08-09 1992-02-08 1992-08-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-08-09 1996-02-08 1996-08-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-08-09 2000-02-08 2000-08-09 $7700.00 Window Closed / Lapsed

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