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US 2001/0033496 A1Published application
Sewing machine with a light barrier
AssigneePfaff Industrie Maschinen GmbH
InventorKarl-Ludwig Manuel
Life of this patent
Estimating the term…
Abstract
A sewing machine with a light barrier used to detect the edge of a workpiece has an optical light guide (17) connected to the light source (15). The optical guide (17) is arranged in the thread guide hook (12). The thread guide hook (12) is fastened to the front side of the head (4) of the housing and is designed as a small tube for this purpose.
Claims4
A sewing machine with a light barrier, the sewing machine comprising:
- a light source;
- an optical light guide;
- a lens arranged in a head area of the sewing machine;
- a light receiver for detecting the edge of a workpiece in the area of a stitch formation site, said light source being connected via said optical light guide to said lens;
- and
- a thread guide hook located in a vicinity of a thread-tensioning device, said thread guide hook comprising a small tube, said optical light guide being led through said thread guide hook, said lens being arranged on an obliquely downwardly directed free end of said thread guide hook.
3 more elements
A sewing machine with a light barrier, the sewing machine comprising:
- a baseplate;
- a column connected to said baseplate;
- an arm connected to said column;
- a head connected to said column;
- a thread-tensioning device connected to said head;
- a light source;
- an optical light guide;
- a lens arranged in a head area of the sewing machine;
- a light receiver for detecting the edge of a workpiece in the area of a stitch formation site, said light source being connected via said optical light guide to said lens;
- and
- a thread guide hook located adjacent to said thread-tensioning device, said thread guide hook comprising a small tube, said optical light guide being led through said thread guide hook.
8 more elements
Dependencies are inferred from the claim text.