Sewing – Special machines – Embroidering
Patent
1983-11-16
1984-12-18
Feldbaum, Ronald
Sewing
Special machines
Embroidering
D05C 1500
Patent
active
044884982
ABSTRACT:
A decoratively stitched trim panel is produced by a new apparatus. The trim panel includes a series of decorative stitches of alternating visible and embedded, non-visible loops frictionally retained within the substrate of the trim panel without passing all the way therethrough. The stitching is produced by a method involving the steps of embedding the thread into the substrate with a hollow thread-containing needle, withdrawing the needle up out of the trim part to draw sufficient thread therethrough to make up a visible and half of an embedded loop, indexing the needle forward, re-embedding and withdrawing it again. A stitching machine includes a hand held frame with a pivoted air cylinder having an extendible and retractable arm with a hollow needle thereon. The needle has a slanted tip with a pointed leading edge and a notched trailing edge through which the thread passes. When the cylinder is fired the arm and needle extend until part of the arm begins to engage a cam ramp on the frame just as the tip of the needle begins to pierce the trim part. This engagement with the ramp automatically and repeatably pushes the frame forward the distance of a visible loop, whereupon the cylinder is fired again, and so on.
REFERENCES:
patent: 3229653 (1966-01-01), Roberts et al.
patent: 3430590 (1969-03-01), Looper
patent: 3645219 (1972-02-01), Jenkins
patent: 3968758 (1976-07-01), Scholz
patent: 4132182 (1979-01-01), Heemstra
patent: 4267784 (1981-05-01), Heemstra
patent: 4366762 (1983-01-01), Willis
patent: 4388881 (1983-06-01), Price
Feldbaum Ronald
General Motors Corporation
Griffin Patrick M.
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