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EP0259144A2
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EP
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Reproduction machine with diagnostic system
Assignee: Xerox Corp
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Filing: 1987-09-02
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Granted: —
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Expires: 2007-09-02
Abstract
Abstract A reproduction machine (10) for making copies from original documents includes a paper path through which sheets of paper are passed by transport devices during reproduction operations to various stations (A - E) in the machine for operation thereon. A diagnostic system is included for examining the operation of the transport devices moving the paper sheets through the paper path, comprising: paper path sensors (S1 - S5) located along the paper path for sensing the passage of paper sheets as they are moved therethrough; a device clock (CK) for generating information regarding the times of sheet passage past the sensors; an addressable memory (114) for storing data representative of machine operating time and corresponding to paper sheet passage past the sensors for a number of paper sheet passages; a non-volatile memory (120) for storing data corresponding to the passage of paper sheets past the paper path sensors on receipt thereof from the addressable memory, and a control (24) and display (26) for accessing and reviewing the memories containing time information representative of paper sheet passages.
Inventors
- 👤 Paul Francis Schmitt
- 👤 Charles David Braswell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 11:29
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/70; G03G15/55
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A reproduction machine for making copies from original documents, having at least a first paper path through which sheets of paper or other material are passed by transport devices during reproduction operations to various stations in said machine for operation thereon, and a diagnostic system for examining the operation of said transport devices moving said sheets through said paper path, said diagnostic system comprising: paper path sensing means located along said paper path for sensing the passage of sheets as they are moved therethrough; clock means for generating data representative of machine operating time; addressable memory means for storing data representative of machine operating time and corresponding to sheet passage past said sensing means for a preselected number of sheet passages; non-volatile memory means for storing said data corresponding to the passage of paper sheets past said paper path sensors on receipt thereof from said addressable memory means; means for selectively accessing the memory means containing said time representations of said sheet passage.
Claim 2
Dependent Claim
163 words
A reproduction machine for making copies from original documents, having at least a first paper path through which sheets of paper or other material are passed by transport devices during reproduction operations to various stations in said machine for operation thereon, and a diagnostic system for examining the operation of said transport devices moving said sheets through said paper path, said diagnostic system comprising: paper path sensing means located along said paper path for sensing the passage of sheets as they are moved therethrough; clock means for generating data representative of machine operating time; addressable memory means for storing data representative of machine operating time and corresponding to sheet passage past said sensing means for a preselected number of sheet passages; non-volatile memory means for storing said data corresponding to the passage of paper sheets past said paper path sensors on receipt thereof from said addressable memory means; means for selectively accessing the memory means containing said time representations of said sheet passage.
Claim 3
Dependent Claim
34 words
A reproduction machine as claimed in claim 1, wherein the diagnostic system includes display means for displaying said data representative of machine operating time and corresponding to copy sheet passages in operator readable format.
Claim 4
Dependent Claim
58 words
A reproduction machine as claimed in claim 1 or 2, wherein the diagnostic system reference memory means for storing data representative of the passage of sheets past said paper path sensors and indicative of optimum operation of said transport devices; means for selectively accessing said optimum operation data; and means for selectively displaying said optimum operation time representations.
Claim 5
Dependent Claim
41 words
A reproduction machine as claimed in claim 3, wherein the diagnostic system further includes comparator means for comparing said stored optimum operation data with said sensed data; and means for selectively displaying the comparison of said optimum and said sensed data.
Claim 6
Dependent Claim
22 words
A reproduction machine as claimed in claim 4, wherein said comparison comprises the difference value between said optimum and said sensed data.
Claim 7
Dependent Claim
32 words
A reproduction machine as claimed in any preceding claim, wherein the diagnostic system includes disk memory storage means for storing said data representative of machine operating time and corresponding to sheet passage.
Claim 8
Dependent Claim
51 words
A reproduction machine as claimed in claim 6, wherein said disk memory storage means includes storage media removable from said disk memory storage means for recording said data representative of machine operating time and corresponding to sheet passage thereon, whereby said recorded data may be examined remotely from said diagnostic system.
Claim 9
Dependent Claim
39 words
A reproduction machine as claimed in any preceding claim, wherein the diagnostic system includes means moving said data representative of sheet passage past said paper path sensors to said non-volatile memory means on the occurrence of a preselected condition.
Claim 10
Dependent Claim
18 words
A reproduction machine as claimed in claim 8, wherein said preselected condition includes malfunction of said transport devices.
Claim 11
Independent Claim
105 words
A method for examining the operation of a reproduction machine having at least a first paper path for circulating sheets therethrough and including paper path sensors along said paper path, including the steps of: a. sensing passage of a sheet past paper path sensors; b. storing information regarding the time of sheet passage past said paper path sensors in an addressable memory for a plurality of paper sheets, whereby information is stored for a series of operations of said reproduction machine; c. continuously updating said information by deleting sheet passage information for the oldest sheet passage and adding information regarding the most recent sheet passage.
Claim 12
Independent Claim
105 words
A method for examining the operation of a reproduction machine having at least a first paper path for circulating sheets therethrough and including paper path sensors along said paper path, including the steps of: a. sensing passage of a sheet past paper path sensors; b. storing information regarding the time of sheet passage past said paper path sensors in an addressable memory for a plurality of paper sheets, whereby information is stored for a series of operations of said reproduction machine; c. continuously updating said information by deleting sheet passage information for the oldest sheet passage and adding information regarding the most recent sheet passage.
References Cited (Backward Citations)
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