Brother Kogyo Kabushiki-Kaisha

Brother Industries, Ltd.

Kazutoshi Hayashi

Masayuki Hori

Noboru Mizuno

Yasuhiro Watanabe

Akira Terao

Nobuaki Matsumoto

A circular stitcher for a sewing machine having a bed and a needle plate, and a feed dog includes a base attachable to an upper surface of the bed or the needle plate; a pin support seized movably in a predetermined direction by the base and having an engagement subject; a pin having an engagement engagable with the engagement subject of the pin support and a needle that pierces a workpiece cloth from an underside of the workpiece cloth at a laterally spaced position from a needle drop point, the needle assuming a center of rotational cloth feed executed by the feed dog during circular stitching; and a lock mechanism provided in the pin support and releasably locking the engagement and the engagement subject together.

Circular stitcher for sewing machine and sewing machine

Sewing machine

A needle threading device of a sewing machine comprising a needle threading shaft mounted rotatably and vertically movably; a needle threading hook fixed to a lower end of the needle threading shaft; and a rotating mechanism that rotates the needle threading shaft such that the needle threading hook passes through a needle eye of the sewing needle. In a such a needle threading device, a first thread guide member is fixed to a lower end of the needle threading shaft and arranged opposed to the needle threading book with respect to the needle threading shaft; a second thread guide member is pivotally mounted on the lower end of the needle threading shaft and linked to the first thread guide member via a link mechanism. The second thread guide member is mounted with a thread retaining unit that retains the upper thread upon needle hooking.

Needle threading device for sewing machine and sewing machine

A needle bar thread guide for a sewing machine includes a thread guide body mounted on a needle bar and having a threading portion for threading the sewing machine, an introducing portion formed on the thread guide body for introducing a needle thread to the threading portion, and a fall-off preventing member disposed at a position near to spaces over and below the thread guide body. The fall-off preventing member allows the needle thread to be introduced via the introducing portion to the threading portion and prevents the needle thread introduced to the threading portion from falling off from the introducing portion.

Needle bar thread guide for sewing machine

A threader for a sewing machine includes a thread tension regulator, a thread take-up spring, a thread take-up lever, a thread transferer setting a needle thread drawn from a thread supply onto the thread tension regulator, the thread take-up spring and the thread take-up lever so that the thread tension regulator, the thread take-up spring and the thread take-up lever are threaded, a path forming member forming a guide path guiding the thread transferee so that the thread transferer is moved, a driving unit driving the thread transferer, and a drive transmitting member transmitting drive of the driving unit to the thread transferer.

Threader for sewing machine

An embroidery pattern processing apparatus including a reading device which reads a plurality of sets of embroidery data from a plurality of external memories, each of the sets of embroidery data defining an embroidery pattern to be formed by a sewing machine; a selection display which displays the embroidery pattern of each set of embroidery data read by the reading device; a manually operable selecting device for selecting a plurality of embroidery patterns from the embroidery patterns displayed on the selection display; and a writing device which writes, in an embroidery pattern memory, the sets of embroidery data for the embroidery patterns selected by the selecting device from the external memories.

Embroidery pattern processing apparatus

A movable blade unit in an automatic thread cutting device comprises a plate-like arresting member having an arresting portion for arresting the needle thread and the bobbin thread. A plate-like movable blade provided with a cutting edge cuts the needle thread and the bobbin thread in cooperation with a fixed blade and is disposed under the arresting member. A plate-like guide member is disposed under the movable blade and provided with a guide portion for guiding the needle thread and the bobbin thread arrested by the arresting member into a slit formed in the arresting member. A spacer interposed between the movable blade and the guide member forms a gap for receiving the fixed blade between the movable blade and the guide member. These members of the movable blade unit are easy to form; hence, the movable blade unit can be fabricated at a reduced cost and surely holds and cuts the needle thread and the bobbin thread.

Thread cutting device for a sewing machine

A sewing machine incorporates a needle bar disconnecting mechanism (3) and a thread cutting mechanism (9). The needle bar disconnecting mechanism (3) is interposed between an arm spindle (2) and a needle bar (4), which normally transmits rotations of the arm spindle (2) to the needle bar (4) to vertically move the latter up and down but disconnects the needle bar (4) from the arm spindle (2) to stop the vertical movement of the needle bar (4) when actuated. The thread cutting mechanism (9) cuts threads at the termination of stitching. A rotational phase detecting mechanism (11) is provided for detecting a rotational phase of the arm spindle (2). An electronic control circuit (12) actuates the needle bar disconnecting mechanism (3) when the rotational phase detecting mechanism (11) detects that the arm spindle (2) has reached a predetermined rotational phase after the thread cutting mechanism (9) is actuated. Therefore, after the threads are cut, a needle (5) attached to the needle bar (4) does not stick into a workpiece fabric.

Sewing machine having needle bar disconnecting mechanism and thread

In a thread trimmer mechanism on a sewing machine, a movable knife for catching and cutting thread and a bobbin pressing member for pressing and applying frictional resistance to a bobbin are operated synchronously with a rotary hook assembly. After needle thread caught by a hook of the rotary hook assembly has passed the end surface of the bobbin, the bobbin pressing member presses the end surface of the bobbin. Therefore, the needle thread is prevented from being caught in the bobbin pressing member and from being excessively supplied. Almost at the same time as the bobbin pressing member presses the end surface of the bobbin, the movable knife catches and cuts the thread. Consequently, even when the movable knife pulls bobbin thread from the bobbin, the bobbin is prevented from spinning freely. As a result, only a short thread extends from the last stitch on cloth, thus enhancing the appearance of the cloth and possibly eliminating a separate trimming operation.

Growing community of inventors

Nagoya, Japan

Kazutoshi Hayashi