Method and apparatus for stitching material along a curve

Details Method and apparatus for stitching material along a curve Method and apparatus for stitching material along a curve

1981-08-03

1982-10-05

Nerbun, Peter P.

Sewing

Elements

Frames

112103, D05C 502

Patent

active

043523340

ABSTRACT:
A method and an apparatus are provided for stitching selected characters on material along a desired arc. A plurality of characters are stored in a character memory. The character memory communicates with a microprocessor which controls the operation of the apparatus. The microprocessor executes predetermined instructions stored in an EPROM while a RAM temporarily stores data required for proper apparatus operation. The characters selected for stitching along the arc are provided to the apparatus by the user. The radius of the arc along which the selected characters are to be stitched is also provided to the apparatus by the user. Each selected character has a reference position and is defined by a plurality of stitch locations having x, y coordinates. The mircroprocessor, in conjunction with the EPROM and RAM, rotates the stitch locations of the selected characters from the reference position to a rotated position using known and determined parameters of the selected characters and the inputted radius. By means of microprocessor control, stepping motors are activated to move a carriage assembly in x and y directions using the rotated stitch locations. The material to be stitched is connected to the carriage assembly and moves therewith. During non-movement of the carriage assembly, the material is stitched using the given and determined rotated stitch locations so that the selected characters are stitched on the material along the desired arc.

REFERENCES:
patent: 3059599 (1962-10-01), Taketomi
patent: 3592152 (1971-07-01), Shimada et al.
patent: 3750186 (1973-07-01), Sakamoto
patent: 4142473 (1979-03-01), Itoh
patent: 4220101 (1980-09-01), Nanai et al.
patent: 4309950 (1982-01-01), Franklin

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