GB1321562A - Conductive sheet detection apparatus - Google Patents

Conductive sheet detection apparatus

Info

Publication number
GB1321562A
GB1321562A GB1321562DA GB1321562A GB 1321562 A GB1321562 A GB 1321562A GB 1321562D A GB1321562D A GB 1321562DA GB 1321562 A GB1321562 A GB 1321562A
Authority
GB
United Kingdom
Prior art keywords
cylinder
coil
coils
sheet
output
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
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.)
Teledictor Ltd
Original Assignee
Teledictor Ltd
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 Teledictor Ltd filed Critical Teledictor Ltd
Publication of GB1321562A publication Critical patent/GB1321562A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/04—Fixed or adjustable stops or gauges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/9505—Constructional details
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/952—Proximity switches using a magnetic detector using inductive coils
    • H03K17/9537—Proximity switches using a magnetic detector using inductive coils in a resonant circuit
    • H03K17/954—Proximity switches using a magnetic detector using inductive coils in a resonant circuit controlled by an oscillatory signal

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

1321562 Feeding sheets TELEDICTOR Ltd 30 May 1972 [15 June 1971] 27905/71 Heading B8R During normal operation of the sheet feed to a sheet processing machine for treating metal sheets, each sheet leading edge comes into contact with a pair of electrically conductive dogs on a cylinder 12 such as a printing-cylinder, the dogs being in an oscillatory circuit resonant at a frequency f and comprising a capacitor 15 and inductor coil 16 in series, the coil 16 being adjacent one end of the cylinder and parallel to the axis thereof. An oscillator 17 having a frequency f feeds a fixed transmitter coil 18. A pair of pick-up coils 19, 21 are arranged coaxially with the coil 18 in null relationship therewith and are connected to a nulling circuit having zero output when the output of coils 19, 21 are equal. The output of the circuit 22 is connected through an amplifier 23 to a level detector 24 connected through logic circuitry to an indicator such as a lamp or buzzer. At one point during each revolution of the cylinder 12, the coil 16 comes into coaxial relationship with the coils 18, 19, 21, and if the dogs 14 are interconnected by a correctly registered sheet this produces an imbalance of the output of the coils 19, 21. The logic circuitry is such that the inductor is operated whenever no such imbalance is produced over a period longer than that of one revolution of the cylinder, i.e. if a sheet is out of register or is not fed to the machine.
GB1321562D 1971-06-15 1971-06-15 Conductive sheet detection apparatus Expired GB1321562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2790571 1971-06-15

Publications (1)

Publication Number Publication Date
GB1321562A true GB1321562A (en) 1973-06-27

Family

ID=10267183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1321562D Expired GB1321562A (en) 1971-06-15 1971-06-15 Conductive sheet detection apparatus

Country Status (1)

Country Link
GB (1) GB1321562A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675737A1 (en) * 1991-04-25 1992-10-30 Hedelberger Druckmaschinen Ag ELECTRICAL OR ELECTRONIC SHEET CONTROL DEVICE FOR PRINTING MACHINES.
EP0551976A1 (en) * 1992-01-17 1993-07-21 Komori Corporation Apparatus for mounting a plate on a plate cylinder
EP0555782A1 (en) * 1992-02-10 1993-08-18 Komori Corporation Plate mounted state confirming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675737A1 (en) * 1991-04-25 1992-10-30 Hedelberger Druckmaschinen Ag ELECTRICAL OR ELECTRONIC SHEET CONTROL DEVICE FOR PRINTING MACHINES.
EP0551976A1 (en) * 1992-01-17 1993-07-21 Komori Corporation Apparatus for mounting a plate on a plate cylinder
US5383402A (en) * 1992-01-17 1995-01-24 Komori Corporation Apparatus for mounting plate on plate cylinder
EP0555782A1 (en) * 1992-02-10 1993-08-18 Komori Corporation Plate mounted state confirming apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees