US3586450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Failsafe system for copying machine
Assignee: International Business Machines Corp
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Filing: 1969-04-10
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Granted: 1971-06-22
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Expires: 1989-04-10
Abstract
Abstract A failsafe system is provided for a copying machine which will operate in response to one of a plurality of sensing devices to stop the xerographic copying process, immediately deenergize the fuser assembly and energize an auxiliary drive system which will merely return the reciprocatable document carriage to the home position so that the original document may be retrieved. When the document carriage reaches the home position, the auxiliary drive system will be shut off with the cover latching mechanism deactivated to prevent the initiation of further cycles until such time as repairs are made and the system is reset for normal operation.
Inventors
- 👤 Richard E Hosey
- 👤 Thomas A Hoskins
- 👤 Myron F Shlatz
- 👤 James W Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/70; G03G15/22; G03G15/28; G03G15/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
In a xerographic copying machine of the type having a rotatable xerographic drum and a reciprocable document carriage movable from a loading position to a remote position and adapted to be synchronously coupled to said drum for return movement to said loading position comprising, first drive means for rotating said xerographic drum, first coupling means for synchronously coupling said carriage to said first drive means during a normal copying cycle, second drive means adapted to be energized upon detection of an abnormality during the copying cycle, abnormality detection means operable to deenergize said first drive means and energize said second drive means, and second coupling means operable subsequent to energization of said second drive means for disconnecting said first coupling means and connecting said second drive means to said carriage to return said carriage to said loading position.
Claim 2
Dependent Claim
138 words
In a xerographic copying machine of the type having a rotatable xerographic drum and a reciprocable document carriage movable from a loading position to a remote position and adapted to be synchronously coupled to said drum for return movement to said loading position comprising, first drive means for rotating said xerographic drum, first coupling means for synchronously coupling said carriage to said first drive means during a normal copying cycle, second drive means adapted to be energized upon detection of an abnormality during the copying cycle, abnormality detection means operable to deenergize said first drive means and energize said second drive means, and second coupling means operable subsequent to energization of said second drive means for disconnecting said first coupling means and connecting said second drive means to said carriage to return said carriage to said loading position.
Claim 3
Dependent Claim
49 words
In a xerographic copying machine as set forth in further comprising means defining a path of travel for copy paper, said abnormality detection means including at least one paper sensing switch means disposed along said path of travel to sense the movement of a copy paper through said machine.
Claim 4
Dependent Claim
49 words
In a xerographic copying machine as set forth in further comprising means defining a path of travel for copy paper, said abnormality detection means including at least one paper sensing switch means disposed along said path of travel to sense the movement of a copy paper through said machine.
Claim 5
Dependent Claim
83 words
In a xerographic copying machine as set forth in claim 1 wherein said second drive means is comprised of an electric motor, cam means rotatable by said motor, switch means for controlling said motor operable by said cam means to provide for a single revolution of said motor, said single revolution being sufficient to return said carriage to said loading position, and latch means for holding said switch means in the position of disconnecting said motor subsequent to actuation by said cam means.
Claim 6
Dependent Claim
111 words
In a xerographic copying machine as set forth in claim 1 wherein said first and second coupling means are mounted for rotation about a common axis, said second coupling means comprising a single tooth means mounted for rotation adjacent said first coupling means and driven by said second drive means, first lever means pivotally mounted on said first coupling means with a portion thereof disposed in the path of rotation of said tooth means, second lever means pivotally mounted on said first coupling means and disposed in engagement with said first lever means for disconnecting said first coupling means upon pivotal movement of said first lever means by said tooth means.
Claim 7
Dependent Claim
88 words
In a xerographic copy machine as set forth in claim 4 further comprising third lever means pivotally mounted on said first coupling means and adapted to be positioned in interfering relation with the pivotal movement of said first lever means upon engagement of said tooth means with said portion of said first lever means to provide a drive from said tooth means to said carriage through said first lever means, said third lever means and the portion of said first coupling means connected for movement with said carriage.
Claim 8
Dependent Claim
59 words
In a xerographic copying machine as set forth in claim 5 further comprising cam means disposed adjacent the path of rotation of said third lever means for disengaging said third lever means from said first lever means and interrupting the drive from said tooth means to said carriage upon the completion of a single revolution of said tooth means.
Claim 9
Dependent Claim
50 words
In a xerographic copying machine as set forth in claim 1 further comprising cover means located at said loading station, cover latching means for locking said cover in the closed position during a copying cycle and cover unlatching means normally disposed in an inoperative position during a normal copying cycle.
Claim 10
Dependent Claim
35 words
In a xerographic copying machine as set forth in claim 7 further comprising activating means operable by said abnormality detection means to shift said cover uNlatching means from said inoperative position to an operative position.
Claim 11
Dependent Claim
43 words
In a xerographic copying machine as set forth in claim 8 further comprising means adapted to be contacted by said carriage operatively connected to said cover unlatching means to unlatch said cover when said cover unlatching means is disposed in its operative position.
Claim 12
Dependent Claim
46 words
In a xerographic copying machine as set forth in claim 9 further comprising latch means for holding said cover unlatching means in the operative position for unlatching said cover and maintaining said cover in the unlatched position subsequent to the operation of said abnormality detection means.
Claim 13
Dependent Claim
33 words
In a xerographic copy machine as set forth in claim 10 further comprising reset means adapted to release said latching means to allow said cover unlatching means to move to the inoperative position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |