US4945385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
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Filing: 1988-09-08
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Granted: 1990-07-31
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Expires: 2008-09-08
Abstract
Abstract An image forming apparatus includes a photosensitive member, first optical system for illuminating an original and exposing the photosensitive member to light from the original, the first optical system including a lens unit having a lens for forming an image of the original on the photosensitive member, and a second optical system for projecting light on the photosensitive member, wherein the lens unit and the second optical systems are fixed on the same base member.
Inventors
- 👤 Akiyoshi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/04018; G03G15/36; H; H04; H04N; H04N1/00; H04N1/04; H04N1/113; H04N1/1135
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
103 words
An apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member; and a second optical means for projecting light on said photosensitive member; wherein said lens unit and said second optical means are fixed on the same base member, and wherein said lens unit is fixed on a top surface of said base member, and said second optical means is fixed on a bottom surface of said base member.
Claim 2
Independent Claim
103 words
An apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member; and a second optical means for projecting light on said photosensitive member; wherein said lens unit and said second optical means are fixed on the same base member, and wherein said lens unit is fixed on a top surface of said base member, and said second optical means is fixed on a bottom surface of said base member.
Claim 3
Independent Claim
99 words
An apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member; and a second optical means for projecting light on said photosensitive member, said second optical means including a laser source for emitting a laser beam and deflecting means for deflecting the laser beam emitted from the laser source; wherein said lens unit and said second optical means are fixed on the same base member.
Claim 4
Independent Claim
99 words
An apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member; and a second optical means for projecting light on said photosensitive member, said second optical means including a laser source for emitting a laser beam and deflecting means for deflecting the laser beam emitted from the laser source; wherein said lens unit and said second optical means are fixed on the same base member.
Claim 5
Dependent Claim
39 words
An apparatus according to claim 2, further comprising a mirror for directing the deflected laser beam to said photosensitive member and a supporting plate for supporting the mirror, wherein the supporting plate is also fixed to said base member.
Claim 6
Dependent Claim
26 words
An apparatus according to claim 1, wherein said lens is movable to change a magnification of the image formed on the photosensitive member from the original.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 1, wherein said base member and an optical axis of said lens are extended parallel.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 1, wherein said second optical unit is effective to dissipate unnecessary electric charge on said photosensitive member.
Claim 9
Dependent Claim
25 words
An apparatus according to claim 1, wherein said base member is made of a steel plate having a thickness of not less than 1.6 mm.
Claim 10
Dependent Claim
33 words
An apparatus according to claim 2, wherein said second optical unit includes a case for accommodating the laser source, the deflecting means, and wherein said base member constitutes a part of the case.
Claim 11
Dependent Claim
19 words
An apparatus according to claim 8, wherein said base member also functions as a top cover of said case.
Claim 12
Dependent Claim
26 words
An apparatus according to claim 2, wherein said lens is movable to change a magnification of the image formed on the photosensitive member from the original.
Claim 13
Dependent Claim
20 words
An apparatus according to claim 2, wherein said base member and an optical axis of said lens are extended parallel.
Claim 14
Dependent Claim
22 words
An apparatus according to claim 2, wherein said second optical unit is effective to dissipate unnecessary electric charge on said photosensitive member.
Claim 15
Dependent Claim
25 words
An apparatus according to claim 2, wherein said base member is made of a steel plate having a thickness of not less than 1.6 mm.
Claim 16
Dependent Claim
98 words
An image forming apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member, wherein said first optical means includes illuminating means for illuminating the original; second optical means for removing residual charge from said photosensitive member, said second optical means including exposure means different from said illuminating means; wherein said lens unit and said second optical means are fixed on the same base member.
Claim 17
Dependent Claim
98 words
An image forming apparatus, comprising: a photosensitive member; first optical means for illuminating an original and exposing said photosensitive member to light from the original, said first optical means including a lens unit having a lens for forming an image of the original on said photosensitive member, wherein said first optical means includes illuminating means for illuminating the original; second optical means for removing residual charge from said photosensitive member, said second optical means including exposure means different from said illuminating means; wherein said lens unit and said second optical means are fixed on the same base member.
Claim 18
Dependent Claim
26 words
An apparatus according to claim 14, wherein said lens is movable to change a magnification of the image formed on the photosensitive member from the original.
Claim 19
Dependent Claim
20 words
An apparatus according to claim 14, wherein said base member and an optical axis of said lens are extended parallel.
Claim 20
Dependent Claim
25 words
An apparatus according to claim 14, wherein said base member is made of a steel plate having a thickness of not less than 1.6 mm.
Claim 21
Dependent Claim
30 words
An apparatus according to claim 14, wherein said second optical means exposes such a portion of said photosensitive member as corresponds to a recording material and a next recording material.
References Cited (Backward Citations)
US3936179A
Cited
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