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US4589761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating optics copier with means for counteracting acceleration reaction forces
Assignee: HP Indigo BV
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Filing: 1984-03-02
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Granted: 1986-05-20
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Expires: 2004-03-02
Abstract
Abstract Reciprocating optics copier in which a mass approximately equal to the mass of a scanning subassembly mounted for movement along a generally horizontal path, is coupled to the subassembly and is driven in a direction opposite to that of the scanning subassembly to counterbalance forces or reaction incident to acceleration of the subassembly.
Inventors
- 👤 Benzion Landa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
Copying apparatus including in combination a generally horizontally disposed platen for receiving a document to be copied, a scanning subassembly, means mounting said scanning subassembly adjacent to said platen for reciprocating movement along a generally horizontal path, means for driving said subassembly along said path to scan a document on said platen, acceleration of said subassembly producing forces of reaction, and means responsive to said driving means for generating forces which are substantially equal in magnitude and opposite in direction to said forces of reaction to counterbalance forces of reaction incident to acceleration of said subassembly.
Claim 2
Dependent Claim
96 words
Copying apparatus including in combination a generally horizontally disposed platen for receiving a document to be copied, a scanning subassembly, means mounting said scanning subassembly adjacent to said platen for reciprocating movement along a generally horizontal path, means for driving said subassembly along said path to scan a document on said platen, acceleration of said subassembly producing forces of reaction, and means responsive to said driving means for generating forces which are substantially equal in magnitude and opposite in direction to said forces of reaction to counterbalance forces of reaction incident to acceleration of said subassembly.
Claim 3
Dependent Claim
64 words
Copy apparatus as in claim 1 in which said reaction force counterbalancing means comprises a mass approximating the mass of said scanning subassembly, means mounting said mass for movement along a path generally parallel to said subassembly path and means connecting said mass to said subassembly concommitantly to drive said mass in a direction opposite to that of said subassembly when driving said subassembly.
Claim 4
Dependent Claim
76 words
Copying apparatus as in claim 1 in which said driving means comprises a pair of endless drive members, each having an upper length and a lower length, means connecting corresponding lengths of each of said drive members to said scanning subassembly to drive the same, said reaction force counterbalancing means comprising a pair of masses aggregating the mass of said scanning subassembly and means connecting corresponding other lengths of said drive members to the respective masses.
Claim 5
Dependent Claim
114 words
Electrophotographic apparatus including a platen adapted to receive a document to be copied, a processing unit having a certain mass, means mounting said processing unit for movement along a generally horizontal path below said platen, a mass approximating that of said processing unit, means mounting said mass for movement along a path generally parallel to said processing unit path, means for driving said processing unit with a forward stroke and a return stroke, and means connecting said mass to said processing unit for movement in a direction opposite to the movement of said processing unit in response to said drive means to counterbalance the forces of reaction incident to acceleration of said processing unit.
Claim 6
Dependent Claim
114 words
Electrophotographic apparatus including a platen adapted to receive a document to be copied, a processing unit having a certain mass, means mounting said processing unit for movement along a generally horizontal path below said platen, a mass approximating that of said processing unit, means mounting said mass for movement along a path generally parallel to said processing unit path, means for driving said processing unit with a forward stroke and a return stroke, and means connecting said mass to said processing unit for movement in a direction opposite to the movement of said processing unit in response to said drive means to counterbalance the forces of reaction incident to acceleration of said processing unit.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |