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Screen printing frame having prestressing reinforcement

A screen printing machine, prestressing technology, applied in screen printing machines, printing, printing machines, etc., can solve problems such as increased stress

Inactive Publication Date: 2007-07-04
唐纽曼 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of thinner walls results in increased stress on the support for a given load

Method used

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  • Screen printing frame having prestressing reinforcement
  • Screen printing frame having prestressing reinforcement
  • Screen printing frame having prestressing reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In the drawings the same reference numerals designate the same elements. In FIG. 1 there is shown a frame 10 for supporting a screen 20 of a screen printing machine. Frame 10 includes four sides 12 , 14 , 16 and 18 joined together at corners 30 , 32 , 34 and 36 . Attached to each side 12 , 14 , 16 and 18 is a screen 20 (which may be a fabric or screen, for example).

[0045]The frame 10 of the embodiment of FIG. 1 is a roller frame which includes a plurality of individual rollers 22, 24, 26 and 28 forming each side of the frame 10. As shown in FIG. The rollers 22, 24, 26 and 28 are preferably hollow (typically cylindrical) tubes made of a non-corrosive, lightweight material such as aluminum. Each roller is attached at each end to a corresponding corner piece by means of a bolt 38 . Corner fittings are rigid components made of a lightweight, non-corroding material such as aluminum or steel. Each end of the roller includes a nut-like element 40 which acts as an end plu...

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PUM

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Abstract

A screen support frame includes elongated frame members and at least one elongated secondary member extending along at least a portion of one of the frame members. The secondary member includes a surface contacting a surface of the frame member and affixed thereto along at least a portion of the secondary member. The affixation of the secondary member occurs while differential strains are imposed on the frame member and the secondary member at the respective contact surfaces to apply a prestress or camber to the frame member. The secondary member may be welded to the frame member. According to another aspect of the invention, a tensioning frame includes rotatably supported rollers for tensioning the screen secured together by connectors. The rollers include hollow cylinders defining an interior in which at least one elongated reinforcing member extends to prestress or camber the roller.

Description

technical field [0001] The present invention relates to a frame for supporting a screen of a screen printing machine and, in particular, to a reinforcing element for such a frame in order to prestress and / or arch the frame. Background technique [0002] Screen printing machines use a tensioned fabric screen or mesh mounted on a support frame. A rubber roller forces ink or other fluid medium through the screen over an area shaped by a stencil. A rubber roller is moved across the screen under pressure to deflect the screen downward toward the substrate, thereby transferring the fluid medium to the substrate. [0003] The screen of a screen printing machine is usually mounted on a rectangular frame having a plurality of connectors holding the edges of the screen in tension. Prior art frames include frames known as "stretch and bond" frames in which the wire mesh is adhered to a support frame while placed under tension. Frames known as "roller frames" are also known in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F15/36
CPCB41F15/36
Inventor 唐纽曼托马斯·A·麦基弗迈克尔·P·A·舒安纳德
Owner 唐纽曼