Abstract: A printer of a wire-dot impact type is provided forwardly of the housing an inlet opening for introducing a printing paper to the inside and has an outlet opening provided at a rear side of the housing for discharging the printing paper to the outside. The printing paper is transported by cooperation of a tractor arranged near the outlet opening and a feed roller arranged near the inlet opening, to thereby run inside the housing in substantially a straight path of travel from the inlet opening to the outlet opening, during which the printing paper is printed by means of a platen and a printing head, both provided between the feed roller and the tractor. A pair of guide members are provided between the feed roller and the printing unit and between the printing unit and the tractor, respectively, to thereby feed the printing paper along the straight path of travel.

Abstract: An electronic pattern stitch sewing machine is disclosed in which stitch control letter pattern data is stored to produce letters in a laterally or vertically readable first orientation and in which stitch coordinate mode changing data is stored to modify the letter pattern data to change the stitch coordinates of the letter patterns thereby orienting the letters in a direction perpendicular to said first orientation.

Abstract: In each of the trial stitchings for stitching a buttonhole by a computerized sewing machine, an increasing or decreasing amount by which a buttonhole size is to be corrected, is processed through an external input device, and in dependence upon corrected results a subsequent trial stitching is performed, whereby proper buttonhole sizes may be easily obtained.

Abstract: In a zigzag sewing machine a first group of pattern cams is rotated with a predetermined speed relative to a second pattern cam group by the arrangement of a transmission means between the first and second groups. A biasing means normally biases a cam follower to engage a selected pattern cam in said first and second groups. Cam selecting means operate to disengage the cam follower by way of the bias means and slidingly move the follower to a selected position along the cam groups.

Abstract: A tension setting device of the sewing machine comprises an upper thread tension device on the machine frame. A selecting device for selecting a thread tension in response to a thickness of a fabric being sewn is mounted to the machine frame. An auxiliary upper thread tension device cooperating with the selecting device and actuated thereby to adjust upper thread tension in response to the thickness of the fabric is provided in the tension setting device. A lower thread adjusting device cooperates with the thread tension selecting device to adjust the lower thread in response to the thickness of the fabric being sewn.

Abstract: The printing mechanism of a dot matrix printer includes a platen provided on its jacket with elongated ink impregnated sintered bodies each extending over the entire length of the platen. The platen is movable in the printing direction at one side of a printing paper. A printing head moves in the same direction but at a different speed at the opposite side of the paper so that impact wires strike different points on a preselected sintered body during the printing of a line.

Abstract: With respect to a printer which carries out printing on a paper by impact of a wire of a printing head repeating movement, a sound proof device of a printer prevents the paper from transmitting fluttering under amplification to the paper sent to an entrance of the printer, and does not cause inconvenience to sending of the paper.

Abstract: This invention provides a pattern selecting device of an electronic control sewing machine which stores stitching pattern data in a memory device. A plurality of indicating windows are arranged in columns and rows at a front part of the sewing machine. The indications of the patterns are made selectively visible according to a stitching pattern group of each of plural modes, in response to the operation of a mode switching member, and stitching patterns in response to the pattern indications in the column or the row are successively selected, and the selected patterns are specifically indicated by illumination.

Abstract: An electronic sewing machine is operated to produce a stitch pattern or a sequence of plural stitch patterns, in response to corresponding stitch control data, which are stored in an electronic memory element of the sewing machine and read out in response to desired manual operation of a pattern selection device provided therein. The pattern selection device includes an operation panel arranged along a laterally extending bracket arm of the machine housing, on which a plurality of sheet switches for selecting alphabet and symbol patterns in reference to their representations shown on the sheet switches are neatly and efficiently arranged. The sheet switches may comprise two rows of pentagonal shaped switches arranged adjacent to each other, or may comprise three rows in which upper and lower rows comprise sheet switches of pentagonal shape and a middle row of regular hexagonal shaped switches is interposed therebetween.

Abstract: A pattern indication arrangement for a pattern selecting device, that is operated by finger-pushing, of a sewing machine, is comprised of a plurality of shorter rectangular pattern indicators; a plurality of longer rectangular pattern indicators, and located on each indicator for actuating the indicators when pushed. Each element is projected from each of the indicators, the shorter rectangular pattern indicators and the longer rectangular pattern indicators are arranged adjacent to each other in longitudinal and transverse directions in alignment with each other in the alternate rows.

Abstract: A presser foot used in combination with a zigzag sewing machine, which is especially adapted to produce a combination stitch comprising a first half series of stitches and a second half series of stitches formed in the normal feeding direction. The presser foot is provided on the bottom at one side thereof with a recess in the feeding direction for preventing the precedingly formed first half series of stitches from contacting the bottom of the presser foot while the second half series of stitches are being formed.

Abstract: A pattern selecting device for a sewing machine of the type having a housing, a panel mounted on the housing for indicating a number of pattern indicia to be selected by the sewing machine operator, and an electronic memory storing a number of stitch control data for producing the stitches in accordance to the pattern indicia. The panel is provided with a first portion carrying a first group of pattern indicia and a second portion for indicating a second group of pattern indicia and a third group of pattern indicia. The pattern selecting device includes two screening plates mounted on the second portion. Both plates are movable relative to the second and third groups of indicia in the second section to selectively hide one of the second and third groups of indicia and visualize the other of the second and third groups of indicia or to hide both the second and third groups of indicia.

Abstract: Multiple hem stitches are produced for joining a plurality of superimposed fabric materials along their edges by employing a sewing machine having a pair of vertically reciprocating needles each carrying a needle thread and a pair of loopers each carrying a looper thread. The first and second needle threads extend along the fabric edge and in parallel with each other on the upper face of the fabrics and penetrate through the fabrics to form a first and second needle thread loops on the underside of the fabrics. The first needle thread loop is distended laterally to the fabric edge by the first looper. The first looper thread encompasses the first needle thread at each penetration point and extends laterally on the upper face of the fabrics to form a first looper thread loop which is caught by the descending first needle to be interlocked with the first needle thread loop along the fabric edge.

Abstract: A thread connecting device for a sewing machine cuts an upper thread which is extending between the sewing machine and one of a plurality of thread spools, and connects an end of a thread belonging to the sewing machine and an end of a thread belonging to the thread spool, in such a manner that the connected part of the threads can smoothly pass through a needle eye, whereby it is possible to supply a desired color thread with respect to the sewing machine having a single needle bar. Therefore the applicable scope of the pattern stitching may be largely widened for colored clothes or other fabrics, especially an embroidery stitching may be performed which requires many kinds of color threads.

Abstract: A stitching adjustment device for a sewing machine having a stitching width adjusting device for controlling a pattern forming device by means of an electronic control device, the stitching adjustment device consisting of a means for adjusting amplitude external from the sewing machine and a means for detachably connecting the amplitude adjusting means with the electronic control device so that when connected the amplitude adjusting means controls the stitching instead of the stitching width adjusting device.

Abstract: A detachable and slideable fabric guide is used in combination with a sewing machine and adapted to bridge a sewing machine bed of a certain width, the fabric guide comprising an elongated main body made of an elastic material with sides which comprise vertical opposite faces, at least one of which is used to contact a fabric edge during stitching operation. The opposite ends of the main body are respectively curved down to integrally form hook portions which are, terminated with opposite abutments or grips each extending laterally of the main body. The opposite abutments normally define therebetween a predetermined distance a little smaller than the width of the sewing machine bed, which distance may be enlarged due to an outward flexing of the hook portions. One of the vertical faces of the main body is provided with a pair of walls protruding laterally therefrom to define therebetween a groove extending the substantial length of the elongated body.

Abstract: A method of automatically adjusting thread tension in a sewing machine including detecting changes of load subjected on the needle bar caused when the needle penetrates the fabric to be sewn and adjusting the electric driving part of the thread tension device in accordance with the values of the changing components of the load.

Abstract: A method of forming stop stitches in a computerized sewing machine which stores needle amplitude control signals and fabric feed signals for forming a plurality of stitching patterns, and temporarily stores a plurality of patterns in accordance with designation by an operation and pattern stitching order, having the steps of providing stop stitch designation to be combined with said operation for said temporary storage or to be operated by way of the stitching, storing a plurality of stop stitch patterns as combinations of signals of relative fine varying amount of stitching coordinate, and selecting, by means of a micro computer, desired stop stitch pattern from said plurality of stop stitch patterns in response to stitchings while forming the patterns and the stop stitches by said stop stitch designation.

Abstract: A color printer, including a guide shaft, a printing head slidably mounted on the guide shaft; a control shaft having a center axis and being parallel to the guide shaft, and a platen slidably mounted on the control shaft so as to be arranged opposite to the printing head, and having a central axis oriented vertically to the control shaft and the guide shaft, and being turnable in a plane vertical to the control shaft, and rotatable around the vertically oriented central axis, the platen also having a plurality of layers respectively containing ink of different color, the layers being adjacently and coaxially arranged on the central axis of the platen so as to form an outer working surface, the outer working surface being oriented in a plane defined by a circular arc having a predetermined radius centered at the center axis of the control shaft so that any one selected layer of the plurality of layers is positionable to directly confront the printing head with a constant predetermined spacing therebetween.

Abstract: A lower thread tension adjusting device is disclosed, which is used in combination with a sewing machine having a horizontal rotary loop taker and a stationary bobbin carrier accomodating a bobbin. A lower thread drawn from the bobbin is passed between a base plate secured to the outer face of the bobbin carrier and the free end of a resilient plate having one end secured to the base plate, so that by manipulation of an adjusting screw a variable degree of tension can be applied to the lower thread. The device is so designed that when an index provided on the adjusting screw is in alignment with a reference mark of the base plate, the lower thread will be given a predetermined standard value of tension.