Sewing – Elements – Frames
Patent
1992-10-27
1994-05-03
Nerbun, Peter
Sewing
Elements
Frames
1122661, 112314, 112456, 11212112, D05B 302, D05B 2100
Patent
active
053077490
ABSTRACT:
A process for determining coordinate values of touchdown sites of a needle for forming sewing patterns with an electronically controlled sewing machine, which is equipped with a feed dog performing only relatively small amounts of displacement and with a needle pivotable in one direction of displacement of the feed dog. The coordinate values for a straight seam section, the consecutive touchdown points of the needle, are determined when the maximum amount of feed of the feed dog in the X coordinate direction and/or the sum of the maximum amount of the lateral movement of the needle which is possible at a given needle position and the maximum amount of feed of the feed dog in the Y coordinate direction is exceeded. The seam section is subdivided by equidistant intermediate touchdown sites, the distances between which in the direction of movement of the needle are composed of a constant percentage of the lateral movement of the needle and of a constant feed percentage of the feed dog.
REFERENCES:
patent: 4226199 (1980-10-01), Adams
patent: 4444135 (1984-04-01), Yangai
patent: 4444135 (1984-04-01), Yanagi
patent: 4539925 (1985-09-01), Shim
patent: 4982674 (1991-01-01), Hayakawa
patent: 4991524 (1991-02-01), Ozaki
G. M. Pfaff Aktiengesellschaft
Nerbun Peter
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