Buttonhole sewing machine and method of buttonhole formation

Sewing – Work manipulating – Guides

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

1122641, D05B 306

Patent

active

044586124

ABSTRACT:
A buttonhole sewing machine for automatically forming a buttonhole including right and left parallel side stitching parts, and another stitching part connected to the side stitching parts. The machine has a switch for detecting front and rear ends of each side stitching part, and is capable of sewing the buttonhole in divided parts on opposite sides of a longitudinal centerline thereof so that the two side stitching parts are stitched in the same work feeding direction. The machine comprises a control circuit generating a feed change signal when the number of stitches being formed in one of the side stitching parts has become equal the total number of stitches of the other side stitching part less a predetermined number, and a feed adjusting circuit for reducing a work feeding increment for a time interval between generation of the change signal and a signal from the switch, to avoid a difference in length between the side stitching parts. The machine is also capable of sewing a buttonhole including a circular stitching part contiguous to the side stitching parts, such that one half of the circular stitching parts is sewn immediately after formation of at least one stitch in the other half of the circular stitching part for avoiding a gap between the two halves.

REFERENCES:
patent: 4215640 (1980-08-01), Coughenour
patent: 4250821 (1981-02-01), Miyao et al.
patent: 4343249 (1982-08-01), Takenoya et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Buttonhole sewing machine and method of buttonhole formation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Buttonhole sewing machine and method of buttonhole formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buttonhole sewing machine and method of buttonhole formation will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1571333

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.