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Printing screens, frames therefor and printing screen units

A technology for printing screen and frame, applied in printing, printing machine, rotary printing machine, etc., can solve the problems of operator's personal injury, limit the scope of mass production, easy to damage and so on

Inactive Publication Date: 2011-08-24
先进装配系统英国有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, these printing screen devices do still have a number of important drawbacks
In particular, the edges of the printing screen need to be softer than its body and as such are more prone to damage during handling and installation
This is especially true when printing screens are stored as unsupported sheets
And, because the printing screen is very thin, generally speaking, its thickness is about 0.1 to 0.25mm, and its edge is as sharp as a razor, which may cause personal injury to the operator if it is not handled with extreme care
Furthermore, the printing screen is limited to only those materials that have the strength required to allow direct tensioning by the tensioning mechanism
Still further, the printing screen requires special production processes such as etching, electroforming and stamping, thus limiting the scope of mass production

Method used

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  • Printing screens, frames therefor and printing screen units
  • Printing screens, frames therefor and printing screen units
  • Printing screens, frames therefor and printing screen units

Examples

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Embodiment Construction

[0126] Figures 1(a) to (c) show a printing screen device 10 according to a first embodiment of the present invention.

[0127] The printing screen device 10 comprises a printing screen 12, a pair of interface elements 16, 16 and a pair of support elements 18, 18, the printing screen being rectangular in this embodiment, the interface elements being connected to the printing screen 12 On one pair of opposite edges of the screen 12, the support element is connected to the other pair of opposite edges of the printing screen 12.

[0128] The printing screen 12 includes a pattern of holes 20 that define the pattern of deposits to be printed. The pattern of holes 20 can be formed, for example, by laser cutting or etching methods known in the art. In a preferred embodiment, the printing screen 12 comprises a sheet of metal, such as stainless steel, or plastic.

[0129] Each interface element 16 , 16 includes an elongated element extending along the length of the corresponding edge ...

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PUM

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Abstract

A printing screen, comprising a sheet, at least sections of at least one pair of opposite edges of which are folded such as to define attachment elements, and a printing screen unit including at least one pair of interface members attachable to the attachment elements at the at least one pair of opposite edges of the sheet.

Description

[0001] This application is a divisional application of an invention patent application with application number 03814955.9, entitled "Printing Screen, Its Frame and Printing Screen Device", owned by Dirk Victor Geld Co., Ltd. technical field [0002] The present invention relates to a printing screen, commonly also otherwise known as a stencil or mask, which is used for screen printing of workpieces, generally electronic substrates such as circuit boards and component, and also its frame and printing screen unit. Background technique [0003] In one known printing screen arrangement, the printing screen consists of a thin hard metal sheet, typically stainless steel or brass, with a plurality of printing holes which define the printing pattern of the printing medium, the printing The medium is generally solder paste. The printing screen is mounted to a rectangular frame with a flexible perforated sheet, typically a woven mesh of polypropylene or stainless steel cords, which a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F15/36
Inventor 詹姆斯·G·霍尔弗雷泽·肖
Owner 先进装配系统英国有限公司