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Sewing machine

A sewing machine and sewing thread technology, which is applied to sewing machine components, sewing machines, and thread-cutting mechanisms in sewing machines, etc., can solve the problems of rapid wear and labor of knives, and achieve increased service life, increased cutting performance, and increased service life. Effect

Inactive Publication Date: 2008-11-19
DURKOPP ADLER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But cheap accessory knives tend to wear out quickly and have to be replaced with new ones, which is also laborious

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0024] The sewing machine 1 has a base plate 2 with a post 3 extending upwardly from the base plate and a curved arm 4 . This curved arm terminates in the head 5 . The base plate 2 , column 3 , arm 4 and head 5 are surrounded by a housing 6 of the sewing machine 1 . An unshown arm shaft is installed in the arm 4 for rotation. In the head 5, the arm shaft operates a needle bar 7 via a crank drive, which is arranged in the head 5 for axial movement. The lower end of the needle bar 7 has a needle 8 . The needle 8 can be moved up and down along a vertical axis by means of a crank drive. The needle 8 has a hole for guiding a needle thread (also not shown) supplied by a bobbin (not shown).

[0025] The base plate 2 carries a support plate 9 on which the workpieces to be sewn by the sewing machine 1 can be placed. The support plate 9 consists of several parts. The stitch plate 10 forms part of the support plate 9 and is screwed onto the base plate 2 . The base plate 2 has a st...

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PUM

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Abstract

The invention relates to a sewing machine having a shell (6) and at least one knife for cutting workpiece or sewing thread. An assorted knife (16) interacts on the knife (24). The assorted knife (16) is the cutting plate retaining in position in the retaining frame that retains the assorted knife. The assorted knife (16) can be inserted to the assorted knife retaining frame from at least two different orientations. In every of these orientations, one of plural assorted knife cutting edge (23) and the knife (24) are interacted. The assorted knife cutting edge (23) is mounted on respective orientation, thereby obtaining this sewing machine. The assorted knife that can be economically produced in the sewing machine can respectively obtain high cutting performance or service life in comparison with the existing technology.

Description

technical field [0001] The invention relates to a sewing machine comprising a housing, a knife for cutting / cutting one of a set of workpieces and a sewing thread, and a companion knife interacting with the knife. The invention also relates to a matching knife for such a sewing machine. Background technique [0002] Such sewing machines are disclosed in DE 3303034A1, DE 8630911U1 and DE 102004015813B3. In order to minimize the wear and tear of the matching knife, the matching knife usually consists of very high-quality material. This is very costly. But cheap accessory knives tend to wear out quickly and have to be replaced with new ones, which is also laborious. [0003] AT 414129B and EP 933461A2 disclose cutting devices for sewing materials or workpieces in which a disc knife interacts with a counter knife. Contents of the invention [0004] It is therefore the object of the present invention to devise a sewing machine of the above-mentioned type in which an economic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B37/04D05B65/00
CPCD05B37/00D05B65/00D05B37/04
Inventor P·马特奇克
Owner DURKOPP ADLER AG