Patent US4641957A successfully refreshed from Google Patents.
US4641957A
Expired / Lapsed
US
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Optical member drive system for copying machine
Assignee: Minolta Co Ltd
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Filing: 1986-04-04
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Granted: 1987-02-10
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Expires: 2006-04-04
Abstract
Abstract An optical drive system for a copying machine or the like including a projector lens assembly movable along a predetermined path, which system comprises a drive unit for moving the lens assembly, a device for, when the lens assembly is moved along the predetermined path which is divided into a predetermined number of zones, setting a speed at any one of the zones to a value appropriate to the magnitude of a load acting on the drive unit, and a control for speed controlling the drive unit in accordance with the speed set by said setting device.
Inventors
- 👤 Katsuhiko Takeda
- 👤 Masamichi Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/041
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
95 words
An optical member drive system for a copying machine or the like including a projector lens assembly movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; means for, when the lens assembly is moved along the predetermined path which is divided into a predetermined number of zones, setting a speed at any one of the zones to a value appropriate to the magnitude of a load acting on the drive unit; and means for speed-controlling the drive unit in accordance with the speed set by said setting means.
Claim 2
Dependent Claim
95 words
An optical member drive system for a copying machine or the like including a projector lens assembly movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; means for, when the lens assembly is moved along the predetermined path which is divided into a predetermined number of zones, setting a speed at any one of the zones to a value appropriate to the magnitude of a load acting on the drive unit; and means for speed-controlling the drive unit in accordance with the speed set by said setting means.
Claim 3
Dependent Claim
51 words
A system as claimed in claim 1, further comprising a lens position detecting means disposed on the predetermined path, a lens position signal which is detected by said detecting means being applied to the setting means for the determination of one of the zones in which the lens assembly is located.
Claim 4
Dependent Claim
63 words
A system as claimed in claim 2, wherein said detecting means comprises a sensor member, and said drive unit is a stepper motor and wherein the current position of the lens assembly is determined by a reference position detected by the sensor member and the number of pulses required for the lens assembly to move from the reference position to the current position.
Claim 5
Dependent Claim
17 words
A system as claimed in claim 1, wherein said predetermined path is delimited by a curved cam.
Claim 6
Dependent Claim
16 words
A system as claimed in claim 1, wherein said predetermined path lies in an inclined plane.
Claim 7
Dependent Claim
25 words
A system as claimed in claim 1, wherein said drive unit provides a drive not only to the lens assembly, but also to other members.
Claim 8
Dependent Claim
128 words
An optical member drive system for a copying machine or the like including a projector lens assembly movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; a first means for determining a current position of the lens assembly; a second means for determining the direction in which the lens assembly has to be moved; a storage means for storing speeds of movement of the lens assembly in respective zones of the predetermined path which is divided into such zones; and a control means for controlling the drive unit so as to cause the lens assembly to be moved at one of the speeds, which is assigned to the zone of the current position, in a direction determined by the second means.
Claim 9
Dependent Claim
128 words
An optical member drive system for a copying machine or the like including a projector lens assembly movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; a first means for determining a current position of the lens assembly; a second means for determining the direction in which the lens assembly has to be moved; a storage means for storing speeds of movement of the lens assembly in respective zones of the predetermined path which is divided into such zones; and a control means for controlling the drive unit so as to cause the lens assembly to be moved at one of the speeds, which is assigned to the zone of the current position, in a direction determined by the second means.
Claim 10
Dependent Claim
39 words
A system as claimed in claim 7, wherein the storage means stores the zones of the predetermined path in both forward and rearward directions of movement of the lens assembly and, also, the speeds assigned to the respective zones.
Claim 11
Dependent Claim
26 words
A system as claimed in claim 8, wherein the interval between each neighboring zones in the forward direction is different from that in the rearward direction.
Claim 12
Dependent Claim
60 words
A system as claimed in claim 7, wherein the first means includes a lens position detecting member and a calculating means for calculating the current position of the lens assembly in reference to a reference position of the lens assembly, detected by a lens position detecting means, and the distance of movement of the lens assembly from the reference position.
Claim 13
Dependent Claim
17 words
A system as claimed in claim 7, wherein said predetermined path is delimited by a cuurved cam.
Claim 14
Dependent Claim
16 words
A system as claimed in claim 7, wherein said predetermined path lies in an inclined plane.
Claim 15
Dependent Claim
25 words
A system as claimed in claim 7, wherein said drive unit provides a drive not only to the lens assembly, but also to other members.
Claim 16
Dependent Claim
93 words
An optical drive system for a copying machine or the like including an optical member movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; means for, when the lens assembly is moved along the predetermined path which is divided into a predetermined number of zones, setting a speed at any one of the zones to a value appropriate to the magnitude of a load acting on the drive unit; and means for speed-controlling the drive unit in accordance with the speed set by said setting means.
Claim 17
Dependent Claim
93 words
An optical drive system for a copying machine or the like including an optical member movable along a predetermined path, which system comprises: a drive unit for moving the lens assembly; means for, when the lens assembly is moved along the predetermined path which is divided into a predetermined number of zones, setting a speed at any one of the zones to a value appropriate to the magnitude of a load acting on the drive unit; and means for speed-controlling the drive unit in accordance with the speed set by said setting means.
Claim 18
Dependent Claim
53 words
A system as claimed in claim 14, further comprising an optical member position detecting means disposed on the predetermined path, an optical member position signal which is detected by said detecting means being applied to the setting means for the determination of one of the zones in which the optical member is located.
Claim 19
Dependent Claim
63 words
A system as claimed in claim 15, wherein said detecting means comprises a sensor member, and said drive unit is a stepper motor and wherein the current position of the optical member is determined by a reference position detected by the sensor member and the number of pulses required for the optical member to move from the reference position to the current position.
Claim 20
Dependent Claim
17 words
A system as claimed in claim 14, wherein said predetermined path is delimited by a curved cam.
Claim 21
Dependent Claim
16 words
A system as claimed in claim 14, wherein said predetermined path lies in an inclined plane.
Claim 22
Dependent Claim
25 words
A system as claimed in claim 14, wherein said drive unit provides a drive not only to the optical member, but also to other members.
Claim 23
Dependent Claim
27 words
A system as claimed in claim 14, wherein said optical member is a projector lens member for projecting an image of an original to a photosensitive medium.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |