GB1490990A - Copying apparatus having a monitoring device for monitoring the speed at which copying material is conveyed along a transport path - Google Patents

Copying apparatus having a monitoring device for monitoring the speed at which copying material is conveyed along a transport path

Info

Publication number
GB1490990A
GB1490990A GB4695374A GB4695374A GB1490990A GB 1490990 A GB1490990 A GB 1490990A GB 4695374 A GB4695374 A GB 4695374A GB 4695374 A GB4695374 A GB 4695374A GB 1490990 A GB1490990 A GB 1490990A
Authority
GB
United Kingdom
Prior art keywords
speed
capacitor
copying
monitoring
trigger stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4695374A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1490990A publication Critical patent/GB1490990A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/51—Encoders, e.g. linear

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Fixing For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)

Abstract

1490990 Measuring speed electrically AGFAGEVAERT AG 30 Oct 1974 [31 oct 1973] 46953/74 Heading GIN (A) Means for monitoring the speed of copying material 9 in a copying apparatus comprises rotatable means 8 arranged to be driven by the material 9, or by the transport means 5 if no material is present, tachometer means for measuring the speed of rotation of rotatable means 8 and for generating a control signal when said speed falls below a predetermined minimum, and relay 25 for switching off heating means 35 in response to said control signal. Relay 25 is energized by a signal from a semiconductor trigger stage 22 and may also open circuit drive motor I and energize ventilator 33. Trigger stage 22 provides a signal when capacitor 19 charges for a sufficient length of time for the voltage applied to the input of the trigger stage 22 to exceed the reference value set by resistors 23, 24. The charging time of capacitor 19 is determined by the width of pulses transmitted from means 10 which depends on the speed of rotation of shaft 6. Every time electrical continuity between contacts 13, 14 is interrupted a positive voltage surge, differentiated by the circuit comprising capacitor 29 and resistor 30, is applied to the control electrode of the field effect transistor 20 which discharges capacitor 19.
GB4695374A 1973-10-31 1974-10-30 Copying apparatus having a monitoring device for monitoring the speed at which copying material is conveyed along a transport path Expired GB1490990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732354571 DE2354571C3 (en) 1973-10-31 1973-10-31 Safety device on copiers to monitor the transport speed of the copied goods

Publications (1)

Publication Number Publication Date
GB1490990A true GB1490990A (en) 1977-11-09

Family

ID=5896943

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4695374A Expired GB1490990A (en) 1973-10-31 1974-10-30 Copying apparatus having a monitoring device for monitoring the speed at which copying material is conveyed along a transport path

Country Status (5)

Country Link
JP (1) JPS5075436A (en)
DE (1) DE2354571C3 (en)
FR (1) FR2250142B1 (en)
GB (1) GB1490990A (en)
IT (1) IT1021970B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5435388B2 (en) * 1974-12-27 1979-11-02
JPS5378847A (en) * 1976-12-21 1978-07-12 Nec Corp Fixing instrument for static recording facsimile and similar apparatus

Also Published As

Publication number Publication date
FR2250142A1 (en) 1975-05-30
FR2250142B1 (en) 1980-05-30
JPS5075436A (en) 1975-06-20
DE2354571A1 (en) 1975-05-15
DE2354571B2 (en) 1978-06-22
IT1021970B (en) 1978-02-20
DE2354571C3 (en) 1979-02-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee