Brother Kogyo Kabushiki-Kaisha

Brother Kabushiki Kaisha

Yukio Nishida

Etsuzo Nomura

Yasuo Sakakibara

Tetsuo Kozawa

Ikuzo Kondo

Takashi Kondo

Akihiro Funahashi

Jun Gamano

Itaru Shibata

Etuzo Nomura

In a buttonhole sewing machine, a sewing mechanism and a feed bracket are controlled to form a buttonhole defined by settings, such as zigzag stitch length, zigzag pitch, bar-tack length, bar-tack pitch, and cutter space. The buttonhole can be set on the operation panel and changed to various shapes by changing the above settings. In particular, the left and right zigzag stitch widths can be set differently, and the front and rear bar-tack lengths can be also set differently. Thus, the balance of the buttonhole can be finely adjusted.

Buttonhole sewing machine

The invention relates to a sewing machine provided with a needle reciprocated according to rotations of a main shaft and work feeding devices actuated synchronously with rotations of the main shaft, setting a margin to sew from a trailing edge to a sewing end position. The sewing machine includes devices for computing a terminal stitch length according to a set margin width. Control devices are provided for controlling a sewing to be carried out for coping with that which corresponds to the terminal stitch length computed by the computing device. The sewing machine further comprises computing devices for applying a correction to at least one of a number of stitches and a feed pitch, as occasion demands, where there arises the remainder as the result of an operation of the computing devices, and control devices for controlling the sewing to be carried out according to the computed result.

Sewing machine

A sewing machine forms a seam in the form of a series of stitches for a length preset by the operator. The length of the seam formed is computed from feed pitches data each generated when one stitch is formed. The operation of the sewing machine is stopped when the computed seam length coincides with the preset seam length.

Growing community of inventors

Kuwana, Japan

Yukio Nishida