EP0141236B1 - Einrichtung zum Spannen von rechteckigen Gewebestücken - Google Patents

Einrichtung zum Spannen von rechteckigen Gewebestücken Download PDF

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Publication number
EP0141236B1
EP0141236B1 EP84111322A EP84111322A EP0141236B1 EP 0141236 B1 EP0141236 B1 EP 0141236B1 EP 84111322 A EP84111322 A EP 84111322A EP 84111322 A EP84111322 A EP 84111322A EP 0141236 B1 EP0141236 B1 EP 0141236B1
Authority
EP
European Patent Office
Prior art keywords
stretching
fabric
tensioning
clamping
piece
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
EP84111322A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0141236A2 (de
EP0141236A3 (en
Inventor
Peter Bopp
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.)
Gbopp & Co AG Metallgewebe- und Drahtwarenfabrik
Original Assignee
Gbopp & Co AG Metallgewebe- und Drahtwarenfabrik
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 Gbopp & Co AG Metallgewebe- und Drahtwarenfabrik filed Critical Gbopp & Co AG Metallgewebe- und Drahtwarenfabrik
Priority to AT84111322T priority Critical patent/ATE27788T1/de
Publication of EP0141236A2 publication Critical patent/EP0141236A2/de
Publication of EP0141236A3 publication Critical patent/EP0141236A3/de
Application granted granted Critical
Publication of EP0141236B1 publication Critical patent/EP0141236B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat

Definitions

  • the invention relates to a device for clamping rectangular pieces of tissue, in particular for the production of screen printing stencils, with a clamping frame made of parallel, mutually displaceable clamping beams with longitudinally movable clamping points at which the tissue piece can be clamped along its edges.
  • Screen printing stencils such as those used in screen printing on ceramic, glass and plastic substrates, but also on a large number of other substrates, consist of screen material, stencil material and frame.
  • the screen material which usually consists of fine-mesh plastic or metal wire mesh, is mechanically tensioned in the warp and weft directions and connected in tensioned condition to the stencil frame, e.g. B. glued.
  • tensioning devices are used, which allow the screen material to be set to the required tension and to be kept under tension until the gluing process has ended.
  • the screen material is stretched in excess with respect to the tensioned material surface, and the frame is separated from the screen material surface after the adhesive has set or dried, which is followed by the sampling process.
  • the essential, quality-determining properties of the screen printing stencil are the height and uniformity of the screen material tension.
  • the stencil is not placed on the substrate to be printed, but is held at a certain distance (jump) from the substrate.
  • the contact pressure of the ink transfer element, the squeegee is now selected so that the squeegee presses the screen material against the substrate to be printed in its application line, but the screen material has no substrate contact at all other locations. This measure ensures the greatest possible agreement between the image created on the stencil and the final printed image.
  • Clamping devices in the form in use today have a clamping frame formed from pairs of parallel, mutually displaceable clamping bars. Numerous collets or clips are mounted on the clamping beams so that they can be held longitudinally, to which the piece of tissue is held along its edges. To tension the piece of fabric in the warp and weft directions, the tensioning beams are moved mechanically or pneumatically crosswise. Such a tensioning device is known for example from CH-A-280446.
  • each collet must be correctly covered with fabric material and closed before the clamping process, which can make clamping a time-consuming process.
  • the invention aims to provide a tensioning device of the type mentioned in the introduction, in which these disadvantages are avoided.
  • each clamping beam has two cooperating clamping members, which extend over the entire length of the clamping beam and are each formed by a pneumatically or hydraulically pressurizable hose made of elastic material, which is held in aligned grooves in a closed row of running pieces mounted on a running rail and at Pressurization undergoes an elongation.
  • this solution has the advantage that each fabric edge is completely fixed by a single clamping movement. Secondly, by using pressurized hoses as clamping elements, the material edge is held along its entire length during tensioning, so that the fabric is evenly tensioned.
  • clamping beams 1, 2, 3 and 4 which are arranged in pairs in parallel and together form the clamping frame. Each clamping bar holds an edge of the rectangular piece of tissue 5.
  • Two parallel clamping beams 1, 3 and, 2, 4 can be moved against each other. B, generated by means of a spindle drive 6 on each clamping beam. In their place, z. B. pneumatically or hydraulically operated motors.
  • the parallelism of the pairs of clamping beams can be by mechanical means, for. B. be enforced via guide rods, not shown, or it can be provided a floating attachment between the clamping beam and its moving means. In the latter case, the uniformity of the elongation of the fabric material determines the degree of parallelism of the tensioning beams.
  • the constructive design of the clamping beam is shown in Fig. 2.
  • the clamping beam has a fixed lower part and a hinged upper part.
  • the lower part consists of a support tube 7 and a base plate 8 attached thereto, while the upper part is formed by a pivot plate 9, which is connected to the support tube 7 by a longitudinal hinge 10.
  • the base plate 8 and the swivel plate 9 each have a running rail 11 or 12 on the mutually facing sides, on each of which a plurality of running pieces 13 and 14 are mounted in a closed row in a longitudinally movable manner and held in a form-fitting manner.
  • a roller bearing is provided for this purpose, balls 15 being enclosed in longitudinal grooves 16 and 17 of the running rails 11, 12 and the running pieces 13, 14.
  • a plain bearing would also be possible.
  • the two cooperating clamping members are formed by pneumatic or hydraulic pressurized hoses 18 and 19 made of elastic material, which extend over the entire length of the clamping beam.
  • the superimposed runners 13 and 14 have mutually facing open grooves 20 and 21, in which the hoses 18 and 19 are embedded except for a free longitudinal portion thereof required for the clamping function.
  • the grooves 20 and 21 of all the running pieces 13 and 14 of a row are in alignment.
  • the hoses 18 and 19 are connected in a manner not shown at one end of the tensioning beam to a supply line for the pressure medium and closed at the other end of the tensioning beam.
  • the entire upper part of the tensioning bar can be opened by inserting a piece of fabric by means of the hinge fastening 10.
  • the upper and lower part of the clamping beam can be mutually fixed by a lock.
  • a holding rod 22 is used for this purpose, which is attached to the base plate 8 and passes through the pivot plate 9 in a bore 23.
  • a wedge 26 provided with a handle 25 can be inserted through a transverse bore 24 in the holding rod 22 and holds the swivel plate 9 in the position shown.
  • two or more such locking devices are provided on a clamping beam.
  • hoses 18 and 19 are now pressurized, they generate a clamping pressure over the entire length of the tensioning beam on the previously inserted piece of fabric edge, as a result of which it is held on the tensioning beam.
  • the tensioning bars 1 to 4 arranged according to FIG. 1 are moved away from each other in pairs by a certain distance (tensioning path) in order to put the clamped tissue piece 5 into the required tension.
  • the fabric material is inevitably elongated in the warp and weft directions. This elongation must be followed by the clamping bar along the clamping line, i. H. the respective clamping line must be longer by the clamping path running parallel to it.
  • the hose pressure is increased with increasing tension, which not only increases the clamping force exerted on the fabric material, but at the same time elongates the hoses and pushes the running pieces 13, 14 apart.
  • the clamping effect and the tensile force exerted on the fabric piece 5 are retained in the gaps between the running pieces, so that a uniform tension of the fabric in the warp and weft directions is achieved.
  • a pressure sensor can indicate the tension of the tissue.
  • the system pressure is a measure of the tissue tension.
  • means can be provided which control the hose pressure as a function of the tensioning path of the tensioning bars.
  • the pressure-dependent elasticity of the hoses is expediently adapted to the stretchability of the respective fabric material.
  • hoses with higher elasticity are to be provided for tensioning plastic fabrics than with metal wire fabrics.
  • the hose can be elongated either from one end of the hose to one side or from the center of the hose to both sides.
  • the running rails can have a stop for the running pieces at one end or in their longitudinal center, from which the longitudinal movement of the running pieces can take place on one or both sides.
  • the piece of fabric to be tensioned should be placed at right angles to the tensioning frame formed from the tensioning beams 1 to 4, i. H. Warp and weft threads of the piece of fabric should run as precisely as possible parallel to the respective tensioning beam.
  • the processor should be able to insert the fabric piece into the tenter frame without damage without great effort.
  • a height-adjustable table 27 is arranged within the clamping frame, which has a table plate 28 which can be extended laterally, as is shown in detail in FIG. 5.
  • a pneumatic cylinder 29 for the height adjustment of the table 27 and several telescopic guides 30 to stabilize its horizontal position are indicated.
  • another drive e.g. B. a spindle drive or a hydraulic cylinder.
  • Two opposing clamping beams 31 and 33 of the clamping frame are shown in Fig. 3 in the open and in Fig. 4 in the closed state.
  • FIG. 5 shows the constructive means for the displaceable mounting of the table top 28.
  • a C-shaped guide rail 39 is attached to two parallel edges of a base 38.
  • In the guide rail rollers 40 are attached, which in turn support the table top 28 on an angle profile 41.
  • retaining bolts 42 and eccentric disks 43 can be used on the table top 28 at selectable positions, which allow the template frame 44 to be elastically pre-tensioned before being glued to the piece of fabric. After the stencil frame provided with the piece of fabric is removed from the tension direction, this pre-tensioning counteracts the fabric tension, so that the tension loss that otherwise occurs is compensated for.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Coloring (AREA)
  • Screen Printers (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Surgical Instruments (AREA)
EP84111322A 1983-11-04 1984-09-22 Einrichtung zum Spannen von rechteckigen Gewebestücken Expired EP0141236B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111322T ATE27788T1 (de) 1983-11-04 1984-09-22 Einrichtung zum spannen von rechteckigen gewebestuecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5959/83 1983-11-04
CH595983 1983-11-04

Publications (3)

Publication Number Publication Date
EP0141236A2 EP0141236A2 (de) 1985-05-15
EP0141236A3 EP0141236A3 (en) 1985-12-11
EP0141236B1 true EP0141236B1 (de) 1987-06-16

Family

ID=4302133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111322A Expired EP0141236B1 (de) 1983-11-04 1984-09-22 Einrichtung zum Spannen von rechteckigen Gewebestücken

Country Status (6)

Country Link
US (1) US4571864A (es)
EP (1) EP0141236B1 (es)
JP (1) JPS60127153A (es)
AT (1) ATE27788T1 (es)
DE (1) DE3464223D1 (es)
ES (1) ES537235A0 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108582966A (zh) * 2018-05-24 2018-09-28 杭州临安鹏宇电子有限公司 一种pcb复合网版

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978414A (en) * 1985-01-18 1990-12-18 Nippon Cmk Corp. Apparatus for stretching silk including means to move cramp members independently of each other
JPS62104750A (ja) * 1985-10-31 1987-05-15 Sony Corp スクリ−ン枠への紗の張付方法
US4685230A (en) * 1986-06-20 1987-08-11 Mason Iii William H Adjustable biaxial stretcher
DE3843000A1 (de) * 1988-04-19 1989-11-02 Continental Ag Vorrichtung zur bereichsweisen festspannung eines biegeschlaffen, flaechigen materials
GB8823259D0 (en) * 1988-10-04 1988-11-09 Spectrum Sciences Bv Imaging apparatus
US5136797A (en) * 1989-09-09 1992-08-11 Hildebrandt Greg A Frame having shiftable bars with flexible ends for securing fabric using adhesive
US5315929A (en) * 1992-09-04 1994-05-31 Sundqvist James W Fine adjustment mechanism for screen printing machines
FR2722138B1 (fr) 1994-07-07 1996-09-20 Bourrieres Francis Pochoir de serigraphie et procede pour le realiser
US5488901A (en) * 1994-12-23 1996-02-06 Hruska; Jerome J. Device and method for stretching a screen on a roller frame
US5722191A (en) * 1995-01-27 1998-03-03 Morgan; Robert Elliott Craft hoop assembly with gripping surface
US5555653A (en) * 1995-01-27 1996-09-17 Morgan; Robert E. Craft hoop assembly
US5732624A (en) * 1995-08-09 1998-03-31 Autoroll Machine Company, Llc Annular shaped silk screen member for silk screen printing halftones
US5913263A (en) * 1995-12-22 1999-06-22 Stretch Devices, Inc. Device and method for stretching a screen on a roller frame
US5768761A (en) 1997-02-13 1998-06-23 Milliken Research Corporation Chair seat frame system
DE19749449C1 (de) * 1997-11-10 1999-01-07 Lpkf D O O Spannrahmen
US5937753A (en) * 1998-02-17 1999-08-17 Stretch Devices, Inc. Method and apparatus for stretching a screen on a screen printing roller frame
ES2230934B1 (es) * 2002-03-11 2006-07-01 Sefar Maissa, S.A. Dispositivo de sujecion de tejidos para su tensado.
US7259912B2 (en) * 2004-01-06 2007-08-21 Infocus Corporation Fresnel lens having reduced distortions
IL180639A0 (en) * 2006-03-13 2007-06-03 Tool Internat Ag F Clamping apparatus for positioning and fixing work pieces
JP2007268733A (ja) * 2006-03-30 2007-10-18 Tdk Corp スクリーン版の製造を行う紗張装置
CN101983867B (zh) * 2010-03-11 2012-06-13 江利 卷轴框绷网器装置及其绷网方法
US20120067531A1 (en) * 2010-09-16 2012-03-22 Anna Ehrsam Reconfigurable Shade
CN112976779B (zh) * 2021-02-09 2022-02-15 广东捷骏电子科技有限公司 一种丝印可调框架及丝印网框

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH280446A (de) * 1950-02-20 1952-01-31 Luescher Geb Einrichtung zum Aufspannen von Gaze auf Druckschablonenrahmen, insbesondere für den Textildruck.
CH402790A (de) * 1963-09-23 1965-11-30 Luescher Ag Geb Einrichtung zum Aufspannen von Gaze auf Druckschablonenrahmen
GB1243390A (en) * 1967-10-12 1971-08-18 American Screen Process Equip Pneumatically operated stretcher device useful for tensioning of screen process stencils
SE382415B (sv) * 1974-05-30 1976-02-02 Almedahls Ab Anordning for montering av tunna cylindriska objekt
US3962805A (en) * 1975-05-22 1976-06-15 Hamu Kaino J Gripping device
US3978905A (en) * 1975-09-02 1976-09-07 Lama Alberto De Canvas stretcher frame
US4179830A (en) * 1977-08-09 1979-12-25 Lamb Terrence R Adjustable frame for stretching sheet material
US4156399A (en) * 1977-12-02 1979-05-29 Fieux Robert E Apparatus for restoring paintings, documents and the like
FR2457334A1 (fr) * 1979-05-21 1980-12-19 Ansquer Ets Dispositif de mise en tension d'un materiau tisse
FR2486459A1 (fr) * 1980-07-08 1982-01-15 Barbier Genevieve Metier a peindre la soie et autres tissus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108582966A (zh) * 2018-05-24 2018-09-28 杭州临安鹏宇电子有限公司 一种pcb复合网版

Also Published As

Publication number Publication date
JPH058120B2 (es) 1993-02-01
JPS60127153A (ja) 1985-07-06
DE3464223D1 (en) 1987-07-23
ES8507043A1 (es) 1985-08-16
ES537235A0 (es) 1985-08-16
EP0141236A2 (de) 1985-05-15
ATE27788T1 (de) 1987-07-15
EP0141236A3 (en) 1985-12-11
US4571864A (en) 1986-02-25

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