US3851144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback fuser for 730s
Assignee: Videojet Technologies Inc
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Filing: 1973-05-24
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Granted: 1974-11-26
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Expires: 1993-05-24
Abstract
Abstract Selective fuser apparatus and control therefor for use in xerographic reproducing apparatus. In the xerographic reproducing apparatus contemplated, documents are scanned and selectively reproduced in accordance with coded information carried thereby. The coded information is utilized for generating print or select signals when a particular document is to be reproduced and when a document is not to be reproduced a non-print or non-select signal is generated. A temperature sensor is provided for sensing the ambient temperature in the fuser assembly. Accordingly, the fuser energization is controlled in accordance with the number of nonselect signals occurring between successive print signals and the ambient temperature of the fuser. Where a relatively large number of non-select signals and/or the ambient temperature in the fuser is low a greater quantity of thermal energy input to the fuser assembly is required.
Inventors
- 👤 M Hutner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
114 words
Apparatus for regulating the fusing of electroscopic particles to successive portions of a support base moved through a fuser assembly wherein said fuser assembly includes means for softening said electroscopic particles and control means therefor, said electroscopic particles corresponding to documents selectively reproduced from a series of documents scanned for such purposes, said apparatus comprising: means for sensing at least one ambient condition of such fuser assembly; means for generating print signals for the document to be selectively reproduced; and means for varying the operation of said control means in accordance with the number of documents not selected for reproduction occurring intermediate successive selected documents and in accordance with at least one ambient condition.
Claim 2
Dependent Claim
114 words
Apparatus for regulating the fusing of electroscopic particles to successive portions of a support base moved through a fuser assembly wherein said fuser assembly includes means for softening said electroscopic particles and control means therefor, said electroscopic particles corresponding to documents selectively reproduced from a series of documents scanned for such purposes, said apparatus comprising: means for sensing at least one ambient condition of such fuser assembly; means for generating print signals for the document to be selectively reproduced; and means for varying the operation of said control means in accordance with the number of documents not selected for reproduction occurring intermediate successive selected documents and in accordance with at least one ambient condition.
Claim 3
Dependent Claim
55 words
Apparatus according to claim 1 wherein said means for softening said electroscopic particles comprises a source of thermal energy coupled to a power source; and said control means comprises switch means in said power source adapted when energized to alter the operation of said thermal energy source from a first condition to a second condition.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2 wherein said source of power comprises a variable supply for applying a high voltage to said source of thermal energy during said second Condition of operation.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 3 wherein said sensing means comprises the temperature sensor for sensing the temperature of said fuser assembly.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 4 including storage means for storing said signals in accordance with the manner in which they are generated.
Claim 7
Dependent Claim
75 words
Apparatus according to claim 5 wherein said storage means comprises a shift register means including an input terminal to which is applied said signals representing documents to be reproduced and means for continually shifting on a periodic basis each signal applied to said input terminal through said shift register means whereby the relative position occupied by signals within the shift register means is a function of the history of those documents, both selected and non-selected.
Claim 8
Dependent Claim
24 words
Apparatus according to claim 6 including decoding means coupling said shift register means and said temperature sensing means to means for actuating said switch.
Claim 9
Dependent Claim
20 words
Apparatus according to claim 7 wherein said successive portions of said support base are intermittently moved through said fuser assembly.
Claim 10
Dependent Claim
123 words
Fuser apparatus for use in a xerographic reproducing apparatus for fusing electroscopic particles to successive portions of a support base intermittently moved through said fuser apparatus, said electroscopic particles corresponding to reproduced documents selected from a series of documents scanned for such purposes, said apparatus comprising: means in said fuser apparatus for emitting radiant energy; temperature sensing means responsive to the ambient temperature in the fuser apparatus; means for generating signals for the documents selected for reproduction; power supply means operatively coupled through said means for emitting radiant energy; and means for regulating said power supply in accordance with the number of documents not selected for reproduction intermediate successive selected documents and in accordance with the temperature sensed by said temperature sensing means.
Claim 11
Dependent Claim
123 words
Fuser apparatus for use in a xerographic reproducing apparatus for fusing electroscopic particles to successive portions of a support base intermittently moved through said fuser apparatus, said electroscopic particles corresponding to reproduced documents selected from a series of documents scanned for such purposes, said apparatus comprising: means in said fuser apparatus for emitting radiant energy; temperature sensing means responsive to the ambient temperature in the fuser apparatus; means for generating signals for the documents selected for reproduction; power supply means operatively coupled through said means for emitting radiant energy; and means for regulating said power supply in accordance with the number of documents not selected for reproduction intermediate successive selected documents and in accordance with the temperature sensed by said temperature sensing means.
Claim 12
Dependent Claim
51 words
Apparatus according to claim 9 wherein said power supply means comprises a variable voltage supply including switch means; and said means for regulating said power supply means comprises means for actuating said switch means whereby to establish different voltage levels from said power supply means to said radiant energy emitting means.
Claim 13
Dependent Claim
22 words
Apparatus according to claim 10 including storage means for storing said signals in accordance with the manner in which they are generated.
Claim 14
Dependent Claim
76 words
Apparatus according to claim 11 wherein said storage means comprises shift register means including an input terminal to which is applied said signals representing documents to be reproduced and means for continually shifting on a periodic basis each signal applied to said input terminal through said shift register means whereby the relative positions occupied by signals within the shift register means as a function of the history of those documents both selected and non-selected for reproduction.
Claim 15
Dependent Claim
25 words
Apparatus according to claim 12 including decoding means coupling said shift register means and said temperature sensing means to means for actuating said switch means.
Claim 16
Dependent Claim
63 words
Apparatus according to claim 13 including start-up signal means for generating a signal when the xerographic apparatus commences operation; and wherein said decoding means comprises gating means responsive to start-up signal means and the temperature sensed by said temperature sensing means for actuating said switch means for a first pre-determined period of time when said fuser apparatus is at a first temperature level.
Claim 17
Dependent Claim
49 words
Apparatus according to claim 14 wherein said decoding means comprises second gating means responsive to said start-up signal means and the temperature sensed by said sensing means for actuating said switch means for a longer pre-determined period of time when said fuser apparatus is at a second temperature level.
Claim 18
Dependent Claim
17 words
Apparatus according to claim 15 wherein said second temperature level is lower than said first temperature level.
Claim 19
Independent Claim
86 words
A method of regulating the operation of a fuser assembly of a xerographic reproducing apparatus comprising the steps of: sensing the start-up of said xerographic reproducing apparatus; sensing the temperature of said fuser assembly; and initiating a first pulse of a pre-determined duration for controlling the operation of said fuser when the temperature level thereof is at first level and initiating a second pulse of a different duration from that of said first pulse when the temperature of said fuser assembly is at a second level.
Claim 20
Independent Claim
86 words
A method of regulating the operation of a fuser assembly of a xerographic reproducing apparatus comprising the steps of: sensing the start-up of said xerographic reproducing apparatus; sensing the temperature of said fuser assembly; and initiating a first pulse of a pre-determined duration for controlling the operation of said fuser when the temperature level thereof is at first level and initiating a second pulse of a different duration from that of said first pulse when the temperature of said fuser assembly is at a second level.
Claim 21
Dependent Claim
73 words
The method according to claim 17 including the step of sensing coded information on documents serially scanned by said xerographic apparatus; generating print signals for each document having a code corresponding to selected ones of said documents to be reproduced; and controlling the operation of said fuser assembly in accordance with the number of documents not selected for reproduction between successive print signals and in accordance with the temperature in said fuser assembly.
Claim 22
Dependent Claim
47 words
The method according to claim 18 wherein the controlling of the operation of said fuser assembly comprises energizing said fuser assembly for a period of time in accordance with the number of documents not selected between the successive selective documents and the temperature in said fuser assembly.
Claim 23
Independent Claim
104 words
A method of regulating the operation of a fuser assembly of a xerographic apparatus wherein electroscopic particles are fused to successive portions of a support base moved through a fuser assembly, said electroscopic particles corresponding to documents selectively reproduced from a series of documents scanned for such purposes, said method comprising the steps of: generating a print signal corresponding to each of the documents to be reproduced; sensing the temperature of said fuser assembly; controlling the energization of said fuser assembly in accordance with the number of documents not selected for reproduction occurring intermediate successive selected documents and in accordance with the temperature sensed.
Claim 24
Independent Claim
104 words
A method of regulating the operation of a fuser assembly of a xerographic apparatus wherein electroscopic particles are fused to successive portions of a support base moved through a fuser assembly, said electroscopic particles corresponding to documents selectively reproduced from a series of documents scanned for such purposes, said method comprising the steps of: generating a print signal corresponding to each of the documents to be reproduced; sensing the temperature of said fuser assembly; controlling the energization of said fuser assembly in accordance with the number of documents not selected for reproduction occurring intermediate successive selected documents and in accordance with the temperature sensed.
Claim 25
Dependent Claim
48 words
The method according to claim 20 including the steps of: generating a signal corresponding to the start-up of said xerographic apparatus prior to generating said print signals; and controlling the energization of said fuser assembly in accordance with at least one of said signals and the temperature sensed.
Claim 26
Dependent Claim
24 words
The method according to claim 21 including the step of: storing said print signals in accordance with the manner in which they are generated.
Claim 27
Dependent Claim
65 words
The method according to claim 22 wherein said print signals are stored in a shift register and including the step of: continually shifting on a periodic basis each signal applied to the input terminal of said shift register whereby the relative positions occupied by said print signals within said shift register means as a function of the history of those documents both selected and non-selected.
Claim 28
Dependent Claim
33 words
The method according to claim 23 including the step of decoding the outputs from said shift register means and the sensed temperature and controlling the energization of said fuser assembly in accordance therewith.
Claim 29
Dependent Claim
19 words
The method according to claim 24 including the step of intermittently moving said support base through said fuser assembly.
References Cited (Backward Citations)
US3772497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |