Computer operated embroidering machine for stitching patterns along a circular arc
AssigneeJanome Sewing Machine Co., Ltd.
InventorHideaki Takenoya
Life of this patent
Estimating the term…
Abstract
Alphanumeric characters are stitched along a curve produced by the R-X coordinate transformation wherein the X-coordinate is curved in relation with a radius while the Y-coordinate remains straight. The characters to be stitched on a fabric are arranged within concentric curves which are determined by a position of the center of the arc with respect to a frame of the alphabetic or numeric character, the height of the frame and the radius of the arc.
Claims4
An apparatus for use in a computer operated embroidering machine to stitch predetermined patterns along a circular arc, comprising means for storing a plurality of patterns as groups of coordinate data whereby each group is defined in its own rectangular coordinate system;
- means for selecting patterns to be stitched;
- means for inputting operational data for the arc stitching, means for retrieving the selected groups of data and transforming their own coordinate systems into a common rectangular coordinate system;
- means for transforming the common coordinate system into a new R-X coordinate system defined only by an arcuate X-coordinate whose radius of curvature corresponds to the radius of the arc;
- means for modifying the groups of data according to said new coordinate system to match the curvature of said arc;
- and means for stitching the modified patterns along said arc.
Dependencies are inferred from the claim text.