GB1292577A - A rotating screen printing machine - Google Patents

A rotating screen printing machine

Info

Publication number
GB1292577A
GB1292577A GB2687771A GB2687771A GB1292577A GB 1292577 A GB1292577 A GB 1292577A GB 2687771 A GB2687771 A GB 2687771A GB 2687771 A GB2687771 A GB 2687771A GB 1292577 A GB1292577 A GB 1292577A
Authority
GB
United Kingdom
Prior art keywords
motor
belt
speed
screens
wheel
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
GB2687771A
Inventor
Adolfo Giani
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.)
Reggiani SpA
Original Assignee
Reggiani SpA
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 Reggiani SpA filed Critical Reggiani SpA
Publication of GB1292577A publication Critical patent/GB1292577A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
    • G05F1/34—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/38—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/10—Machines for multicolour printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/04—Regulating voltage or current wherein the variable is ac
    • G05F3/06—Regulating voltage or current wherein the variable is ac using combinations of saturated and unsaturated inductive devices, e.g. combined with resonant circuit

Abstract

1292577 Automatic control of speed REGGIANI SpA 19 April 1971 [22 June 1970] 26877/71 Heading G3R [Also in Division B6] In a machine wherein material such as fabric is temporarily attached to a belt 1 as by glueing and is fed past at least one rotatable printing screen 6, the belt is driven by a motor-driven driving-pulley 2 and the screens 6 are rotated by a motor 18 through transmission gear 7, the speed of the motor 18 being regulated by transducer means producing output signals representative of the speed of the belt 1 so that the screens 6 rotate with a surface speed equal to that of the belt 1. As shown, a wheel 8 engaging and driven by the belt 1 is coupled by a shaft 27 to an electromechanical transducer 9 which produces a series of pulses with a frequency proportional to the belt speed. These pulses pass to an amplifier converter 10 controlling a step-by-step motor 11 which rotates through a constant angle for each pulse. The motor 11 through gears 12, 13 rotates a screw 14 causing axial displacement of a nut 15 which operates a hydraulic distributer 16 to connect a pump 17 to the hydraulic motor 18 which drives the screens 6. The motor 18 is coupled to the nut 15 by a transmission 19 so that during rotation of the motor, the nut tends to move towards its initial position until a stable position is reached wherein the motor 18 rotates at the required speed. The axis of the wheel 8 is adjustable in a horizontal plane, Figs. 2, 3 (not shown) so that the speed of the wheel can be regulated in relation to that of the belt 1 to compensate for errors due to slippage. An optical displacement sensor may be used instead of the wheel 8. When printing is interrupted by stopping the belt 1 and lifting the screens 6, the screens continue to be driven to prevent dripping of ink, etc., this being effected by a variable frequency squarewave generator 20 connected to the amplifier 10 and which automatically starts to operate when printing stops.
GB2687771A 1970-06-22 1971-04-19 A rotating screen printing machine Expired GB1292577A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2636270 1970-06-22

Publications (1)

Publication Number Publication Date
GB1292577A true GB1292577A (en) 1972-10-11

Family

ID=11219314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2687771A Expired GB1292577A (en) 1970-06-22 1971-04-19 A rotating screen printing machine

Country Status (10)

Country Link
AT (1) AT305186B (en)
BE (1) BE768854A (en)
CA (1) CA944043A (en)
CH (1) CH519990A (en)
DE (1) DE2046467C3 (en)
ES (1) ES392491A1 (en)
FR (1) FR2099285A5 (en)
GB (1) GB1292577A (en)
NL (1) NL7012968A (en)
SE (1) SE383487B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025994A1 (en) * 1999-02-01 2000-08-09 AISA S.p.A. Machine for rotary silk-screen printing of flat sheets with control system for synchronising rotation of the printing screen and feeding of the sheets to be printed

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031823A (en) * 1973-08-27 1977-06-28 Mcgee George S Screen printer with adjustable screen support and magnetic squeegee means
US3978787A (en) * 1973-10-11 1976-09-07 Morrison Machine Co. Drive means for cylindrical screen printer
US3934505A (en) * 1973-12-10 1976-01-27 Bernard Screen Printing Corporation Method and apparatus for synchronous printing of a moving web
DE3915482C2 (en) * 1989-05-11 1995-01-26 Stork Mbk Gmbh Device for angularly synchronous driving of individual printing cylinders of a rotary printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1025994A1 (en) * 1999-02-01 2000-08-09 AISA S.p.A. Machine for rotary silk-screen printing of flat sheets with control system for synchronising rotation of the printing screen and feeding of the sheets to be printed

Also Published As

Publication number Publication date
DE2046467A1 (en) 1972-01-05
CH519990A (en) 1972-03-15
BE768854A (en) 1971-11-03
DE2046467B2 (en) 1979-08-02
SE383487B (en) 1976-03-15
AT305186B (en) 1973-02-12
CA944043A (en) 1974-03-19
NL7012968A (en) 1971-12-24
DE2046467C3 (en) 1980-04-10
FR2099285A5 (en) 1972-03-10
ES392491A1 (en) 1974-07-01

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Legal Events

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