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WO1996005915A1 - Appareil applicateur d'emulsion - Google Patents

Appareil applicateur d'emulsion Download PDF

Info

Publication number
WO1996005915A1
WO1996005915A1 PCT/US1994/009491 US9409491W WO9605915A1 WO 1996005915 A1 WO1996005915 A1 WO 1996005915A1 US 9409491 W US9409491 W US 9409491W WO 9605915 A1 WO9605915 A1 WO 9605915A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
trough
mechanically
pressure
leading
Prior art date
Application number
PCT/US1994/009491
Other languages
English (en)
Inventor
Charles Dipietro
Original Assignee
Charles Dipietro
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 Charles Dipietro filed Critical Charles Dipietro
Priority to PCT/US1994/009491 priority Critical patent/WO1996005915A1/fr
Publication of WO1996005915A1 publication Critical patent/WO1996005915A1/fr

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/12—Production of screen printing forms or similar printing forms, e.g. stencils

Definitions

  • the present invention relates to a silk screen frame emulsion coating apparatus. More particularly the apparatus is completely electro-mechanical requiring no hydraulics or pneumatics and further includes a sensor system for detecting warpage in a screen and adjusting trough position to accommodate the warpage.
  • the apparatus of the present invention is entirely electro- mechanical and does not utilize hydraulics or pneumatics.
  • a further object is to provide an apparatus which is not influenced by the ambient environment.
  • a still further object is to provide an apparatus which has lower manufacturing costs.
  • a yet further object is to provide an apparatus with minimized downtime.
  • a still further object is to provide an apparatus which senses screen warpage and accommodates for same.
  • a further object is to provide an apparatus which minimizes, if not altogether eliminates, creation of unuseable screens.
  • the apparatus of the present invention which includes a screen frame holder and cooperating troughs which coat opposite sides of the screen by running upwardly thereagainst. All motion is provided mechanically without use of hydraulics/pneumatics, with the required motions being electronically controlled in known manner.
  • Each end of each trough is provided with a warpage sensor which senses pressure between the screen and leading trough edge and adjusts trough position in areas of warpage to accommodate same as will be described herein after.
  • Figure 1 is a side view of the silk screen apparatus of the present invention.
  • Figure 2 is a face view of the apparatus of Figure 1.
  • Figure 3 is an enlarged view of a trough tilt mechanism of the apparatus.
  • Figure 4 is an enlarged sectional view of the trough assemblies including the sensor.
  • Figure 5 is a perspective view of a control panel for the apparatus.
  • the apparatus 10 includes a framework 12 which holds a screen 13 to be coated in a vertical orientation.
  • the framework 12 includes a bottom seat 14, four upright members 16 and a top seat 18, a frame 17 of the screen 13 being locked in place within these confines.
  • the entire framework 12 may be mounted on a base 20 which may include wheels 22 thereon to make the apparatus 10 movable. Position of the top seat 18 may be changed by actuating crank handles 19 to accommodate screens 13 of various size.
  • a trough assembly 24 which is used to coat flat surfaces 26 and 28 of the screen 13 with an emulsion (not shown).
  • each trough assembly 24 must be movable vertically along the length of the screen 13.
  • a motor 30 is provided on the base 20, the motor 30 having two gears (not shown) rotationally mounted thereto. Each gear engages a lateral drive timing belt 34 to which ends 36 of a base plate 37 of the trough assembly 24 may be suitably engaged, the belt 34 causing vertical motion of the trough assemblies 24 between lower stop members 38 and upper stop members 40 provided on each upright member 16. Since the trough assemblies 24 must be capable of returning to a bottom most position thereof, the motor 30 is reversible.
  • each assembly 24 has a trough 40 which is spoon shaped in cross section.
  • Each trough 40 includes a leading edge 42 which engages against the screen 13 and over which emulsion pours off onto the screen 13.
  • Each trough 40 is tippable toward and into the screen 13 for the pour, such tipping being produced by a motorized gear 44 which is centered below the trough 40 which engages a geared shaft 46 upon which the trough 40 is mounted.
  • Such shafted mounting ensures that the trough 40 leading edge 42 is at all times maintained linear, with ends of the shaft 46 being supported in a support block 48 mounted at each end of the trough 40.
  • the above described trough 40 and tilt mechanism are mounted on a horizontal base plate 50 have a depending forward lip 52. It will be seen that the leading edge 42 of the trough 40 extends beyond the forward lip 52 so that a clearance is provided between the base plate 50 and the screen 13.
  • This base plate 50 is floatingly supported on a horizontal movable base 54 which seats over the support bracket 37. Between the base 54 and the support bracket 37 at each end thereof is a toothed gear 58 which rests on a free spinning gear 60 which rests within the bracket 37. Above the toothed gear 58 is a toothed rack 62 which depends from a bottom surface 63 of the base 54.
  • the toothed gear 58 coacts with the toothed rack 62 to incrementally move the base 54 horizontally toward or away from the screen 13.
  • Each toothed gear 58 is driven by a reversible motor 64 ( Figure 2) .
  • the motor 64 is capable of very small incremental activations to accommodate the small toothed rack 62.
  • the driven toothed gears 58 are each engaged in fixed position relative to the bracket 37 by an X shaped clip 66 half of which extends from a midpoint 68 of the gear 58 to a termination within openings (not shown) in the bracket 37, such openings fixing the relative angle between arms 69 of the X.
  • a further half of the clip 66 has terminal end rollers 72 thereon and extends from the midpoint 68 of the gear 58 to a termination where the rollers 72 rest on a top surface 74 of the base plate 50, tying the entire trough assembly 24 together.
  • the base 54 has an undercut hollow 76 therein directly behind the depending lip 52 of the base plate 50 extending across the length thereof.
  • a sensor 78 mounted within this hollow 76, at each end thereof, is a sensor 78, such as the transducer 78 shown in the disclosed embodiment.
  • Each transducer 78 is controllingly connected to the motor 64 engaged to the gear 58 at the corresponding end of the assembly 24.
  • the transducer 78 has an activator 80 which is spring biased toward and into contact with the depending lip 52 on the base plate 50.
  • the transducer 78 each form a warpage sensor 78 for the corresponding end of the trough assembly 24.
  • Such decrease of pressure causes activation of the motor 64 engaged thereto to cause the corresponding end of the trough 40 to be moved toward the screen 13 until the pressure sensed by the transducer 78 returns to that which was preselected for the particular screen 13 being coated.
  • the incremental motion is very small, with total travel of the actuator 80 being only one quarter inch.
  • the transducer 78 activates the motor 64 by creating a particular voltage output which is instantaneous and drives the motor 64 instantaneously. Thus areas of warpage are easily accommodated instantaneously.
  • the apparatus 10 It is proposed to allow the apparatus 10 to function automatically or manually in known fashion by activation of push button 94 or 96 respectively.
  • the control panel should have a power supply switch 98 and settable counters 100 and 102 to dial in a number of desired coats for each surface of the screen 13.
  • six push buttons are proposed to be provided for control of operation of each trough 40 with button 104 bringing the trough assembly 24 toward the screen, button 106 moving the trough assembly 24 away, button 108 tilting the trough 40 into the screen 13, button 110 returning the trough 40 to a horizontal position, button 112 moving the trough assembly 24 up and button 114 moving the trough assembly 24 down.
  • button 104 When operated in the manual mode, six push buttons are proposed to be provided for control of operation of each trough 40 with button 104 bringing the trough assembly 24 toward the screen, button 106 moving the trough assembly 24 away, button 108 tilting the trough 40 into the screen 13, button 110 returning the trough 40 to
  • a support structure 122 herein in the form of a wheel 122, is dependingly engaged to a forward end of the underside 63 of the base 54, maintaining the base 54 horizontal and traveling with the base 54, and resting against and rolling upon an upper surface 124 of the bracket 37.
  • the apparatus 10 has a number of advantages, some of which have been described above and others of which are inherent in the invention. Also, modifications may be proposed to the apparatus 10 without departing from the teachings herein. Accordingly, the scope of the invention is only to be limited as necessitated by the accompanying claims.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Appareil (10) destiné à appliquer une émulsion au pochoir, comportant un support (12) de cadre pour la sérigraphie et des auges coopérantes (40) qui appliquent un revêtement sur des faces opposées du pochoir (13) en se déplaçant vers le haut contre ledit pochoir. Tous les mouvements sont mécaniques, sans recours à des mécanismes hydrauliques ou pneumatiques, les mouvements requis étant commandés électroniquement d'une manière connue. Chaque extrémité de l'auge (40) est dotée d'un détecteur de gondolement (78) qui détecte la pression entre le pochoir et le bord de contact de l'auge et règle la position de l'auge dans les zones de gondolement pour s'adapter à ce dernier.
PCT/US1994/009491 1994-08-22 1994-08-22 Appareil applicateur d'emulsion WO1996005915A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1994/009491 WO1996005915A1 (fr) 1994-08-22 1994-08-22 Appareil applicateur d'emulsion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1994/009491 WO1996005915A1 (fr) 1994-08-22 1994-08-22 Appareil applicateur d'emulsion

Publications (1)

Publication Number Publication Date
WO1996005915A1 true WO1996005915A1 (fr) 1996-02-29

Family

ID=22242892

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/009491 WO1996005915A1 (fr) 1994-08-22 1994-08-22 Appareil applicateur d'emulsion

Country Status (1)

Country Link
WO (1) WO1996005915A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108375993A (zh) * 2018-04-12 2018-08-07 王从相 一种太阳能发电系统的阳光追踪机架装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363289A (en) * 1979-10-02 1982-12-14 Firma Ernst Harlacher Printing screen coating method and apparatus
US4893556A (en) * 1987-02-23 1990-01-16 Tdk Corporation Screen printer with double doctor/squeegee, printing pressure sensor and aligning mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363289A (en) * 1979-10-02 1982-12-14 Firma Ernst Harlacher Printing screen coating method and apparatus
US4893556A (en) * 1987-02-23 1990-01-16 Tdk Corporation Screen printer with double doctor/squeegee, printing pressure sensor and aligning mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108375993A (zh) * 2018-04-12 2018-08-07 王从相 一种太阳能发电系统的阳光追踪机架装置
CN108375993B (zh) * 2018-04-12 2020-12-29 斯普屹科技(北京)有限公司 一种太阳能发电系统的阳光追踪机架装置

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