US3609037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slit exposure optical system
Assignee: Ricoh Co Ltd
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Filing: 1969-03-13
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Granted: 1971-09-28
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Expires: 1989-03-13
Abstract
Abstract A slit exposure optical system having a fixed original to be copied and parallelly spaced advancing photocopying paper. A lens is located between the original and photocopying paper and is associated with two reflecting mirrors to transfer an image from the original to the photocopying paper. The lens and each reflecting mirror are movable at different related speeds to maintain the optical path between the lens and the original equal to the optical path between the lens and the photocopying paper.
Inventors
- 👤 Shigeru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525; G03B27/526
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
349 words
A slit exposure optical system for use in a photocopying machine comprising a fixed transparent holder having an original thereon to be copied; photocopying paper spaced from said holder and adapted to be advanced at a predetermined speed relative thereto past a stationary slit to receive a reflected image from said original; a photocopying lens having an associated mirror integrally connected therewith and located between said Holder and said photocopying paper in a first position at the start of photocopying closer to said photocopying paper than said holder; said lens having an optical axis, and said holder and said photocopying paper positioned in parallel relation to said axis; a first reflecting mirror spaced from said lens and having a first position at the start of photocopying where said first reflecting mirror is located on one side of said axis at an angle thereto with one edge thereof in line with said axis; a second reflecting mirror having a first position at the start of photocopying spaced from said first reflecting mirror on the side remote from said lens, said second reflecting mirror located on the other side of said axis at an angle thereto with one edge thereof in line with said axis; said lens having a second position at the termination of photocopying provided by being simultaneously advanced in a direction normal to said holder at half of said predetermined speed and advanced parallel to said holder at half of said predetermined speed to be located closer to said holder than said photographing paper; said first reflecting mirror having a second position at the termination of photocopying provided by being simultaneously advanced in a direction normal to said holder at half of said predetermined speed and advanced parallel to said holder at said predetermined speed to be located closer to said holder than said photocopying paper; and said second reflecting mirror having a second position at the termination of photocopying provided by being advanced in a direction normal to said holder at half of said predetermined speed to be located closer to said holder than said photocopying paper.
Claim 2
Dependent Claim
349 words
A slit exposure optical system for use in a photocopying machine comprising a fixed transparent holder having an original thereon to be copied; photocopying paper spaced from said holder and adapted to be advanced at a predetermined speed relative thereto past a stationary slit to receive a reflected image from said original; a photocopying lens having an associated mirror integrally connected therewith and located between said Holder and said photocopying paper in a first position at the start of photocopying closer to said photocopying paper than said holder; said lens having an optical axis, and said holder and said photocopying paper positioned in parallel relation to said axis; a first reflecting mirror spaced from said lens and having a first position at the start of photocopying where said first reflecting mirror is located on one side of said axis at an angle thereto with one edge thereof in line with said axis; a second reflecting mirror having a first position at the start of photocopying spaced from said first reflecting mirror on the side remote from said lens, said second reflecting mirror located on the other side of said axis at an angle thereto with one edge thereof in line with said axis; said lens having a second position at the termination of photocopying provided by being simultaneously advanced in a direction normal to said holder at half of said predetermined speed and advanced parallel to said holder at half of said predetermined speed to be located closer to said holder than said photographing paper; said first reflecting mirror having a second position at the termination of photocopying provided by being simultaneously advanced in a direction normal to said holder at half of said predetermined speed and advanced parallel to said holder at said predetermined speed to be located closer to said holder than said photocopying paper; and said second reflecting mirror having a second position at the termination of photocopying provided by being advanced in a direction normal to said holder at half of said predetermined speed to be located closer to said holder than said photocopying paper.
Claim 3
Dependent Claim
96 words
A slit exposure optical system according to claim 1 in which each said first and second reflecting mirrors are positioned at 45* to said axis, the movement of said lens from said first to said second position is along a straight line at 45* to said axis, the movement of said first reflecting mirror from said first to said second position is along a straight line at 30* to said axis, and the movement of said second reflecting mirror from said first to said second position is along a straight line at 90* to said axis.
Claim 4
Dependent Claim
35 words
A slit exposure optical system according to claim 1 in which said one edge of said first reflecting mirror in said first position is aligned with an edge of the original placed on said holder.
References Cited (Backward Citations)
CH455489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |