Abstract: In a sewing machine, a feed dog feeds a workpiece placed on a throat plate. A presser bar has a lower end portion on which a presser foot is mountable. A presser bar spring urges the presser bar downward. During a first prescribed period of time in which a top of the feed dog is above a top surface of the throat plate, an adjustment part of an adjusting mechanism is spaced apart from a restricting part of the adjusting mechanism to cause an urging force of the presser bar spring to be transmitted to the presser foot. During a second prescribed period of time in which the top of the feed dog is beneath the top surface of the throat plate, the adjustment part is in contact with the restricting part to prevent the urging force of the presser bar spring from being transmitted to the presser foot.

Abstract: An object of the present invention is to provide an embroidery cloth presser which prevents a needle thread from being sandwiched between the embroidery cloth presser and a cloth to allow an embroidery frame to move smoothly and which also prevents inappropriate draw-in of the needle thread, that is, prevents a cross-over thread of the needle thread resulting from long-distance movement of the embroidery frame from remaining on an embroidery surface. An embroidery cloth presser is installed on a presser bar of a sewing machine to press a cloth to be embroidered and which includes a projection provided on a bottom surface of the cloth presser which contacts the cloth around a needle and forming, between the cloth presser and the cloth, a gap through which a needle thread passes.

Abstract: A sewing machine includes a main body, a presser bar attached to the main body so as to move along a vertical direction of the sewing machine and detachably holding a presser foot, a needle thread tension adjustment mechanism selectively brought into inactive and active modes, the needle thread tension adjustment mechanism releasing a needle thread tension in the inactive mode and maintaining the needle thread tension in the active mode, and a presser bar lifting lever manually rotated along the vertical direction by a user of the sewing machine and adjusting a position of the presser bar in the vertical direction in accordance with the manual rotation, the presser bar lifting lever including a height adjustment cam portion adjusting the position of the presser bar in the vertical direction and a thread tension adjustment cam portion allowing the needle thread tension adjustment mechanism to adjust the needle thread tension.

Abstract: A presser foot drive structure of an embroidery machine, by which a vertically movable presser foot for preventing a sheet of cloth to be sewn from rising in a sewing operation is vertically moved inside a sewing head. The presser foot drive structure includes a presser foot drive holder, which is vertically slidable and is mounted on the outer circumference of a needle bar, which is vertically driven; a presser foot drive shaft, which is disposed parallel to the needle bar via the presser foot drive holder; and the presser foot, which is disposed at the lower end of the presser foot drive shaft and vertically reciprocates. It is possible to reduce the stroke of a presser foot so that it is smaller than that of a needle bar, enhance the supporting force for a needle bar, and reduce the shaking of a presser foot.

Abstract: The invention relates to an apparatus on an embroidering/stitching machine or sewing machine for applying at least one additional band-like material which can be fed to a needle by means of a feeding device, wherein a cutting device is arranged on the feeding device (4), wherein the feeding device (4) can be rotated together with the cutting device around the axis of the needle (6) by means of a drive and the cutting device is driven or can be driven by means of the drive of the presser (1).

Abstract: A clutch structure for a presser foot in an embroidery sewing machine is provided. The clutch structure includes a guide member, to which the presser foot drive link is rotatably connected, and through which the needle bar guide shaft passes, a spring connecting member mounted on the outer circumference of the needle bar guide shaft and inside the guide member, a resilient member mounted on the outer periphery of the spring connecting member, and a pivot member mounted inside the guide member so as to be pivotable around the needle bar guide shaft within a certain angular range by the height adjusting mechanism and the resilient member. Upon a head-interval adjusting operation, the unnecessary driving of the presser foot is prevented, so that the occurrence of vibrations and noise as well as the unnecessary wear of a needle bar, a presser foot support, and a presser foot holder can be prevented.

Abstract: An embroidery presser for an embroidery machine includes a presser bar having a lower end, an operation lever operated so that the presser bar is vertically moved, a needle bar movable vertically, a holder attached to the lower end of the presser bar, a presser foot supported by the holder so as to be vertically movable and having a lower end with a cloth pressing portion intermittently pressing workpiece cloth by a vertical movement of the needle bar, a biasing member normally biasing the presser foot relative to the holder elastically downward, and a presser lifting mechanism abutting the sewing machine frame when the presser bar is lifted by operation of the operation lever, thereby lifting the presser foot relative to the holder.

Abstract: A sewing apparatus includes a hollow needle that can pass through a work cloth, and a needle cover that has a passing hole through which the needle passes and holds the work cloth. The needle cover functions as a presser foot and holds at least a part of a thread between a previous stitch point where a stitch has been previously made and a succeeding stitch point where a stitch is to be currently made. Accordingly, sewing can be performed on the workpiece without use of a lower thread.

Abstract: A sewing machine has at least one sewing head having a presser foot which is vertically reciprocally moved by a predetermined stroke in synchronism with a vertical movement of a needle bar. After completion of the sewing operation, an upper thread is cut in a position spaced by a suitable distance from a sewing needle mounted on the needle bar. A refuge mechanism is operable to move the presser foot to a refuge position for giving refuge to a part of the upper thread on the side of the sewing needle cut after completion of the sewing operation. The refuge position is out of the predetermined stroke.

Abstract: A sewing machine including a sewing needle which conveys a needle thread; a needle bar which supports the sewing needle; a driver which generates a drive force; a first transmission mechanism which transmits the drive force of the driver to the needle bar so as to reciprocate the sewing needle in an axial direction of the needle; a work-sheet presser foot which is movable parallel to the needle bar; a needle thread take-up lever which takes up the needle thread conveyed by the sewing needle; a take-up-lever support member which supports the needle thread take-up lever, the take-up-lever support member being pivotable about a fixed axis line by being driven by the driver, for oscillating the needle thread take-up lever; and a second transmission mechanism which is independent of the needle bar, and transmits the pivotal motion of the take-up-lever support member to the presser foot so that the presser foot reciprocates in relation with the oscillation of the needle thread take-up lever.

Abstract: A cloth presser mechanism comprises a cloth presser vertically movably supported by an arm of a sewing machine. A needle bar is vertically movably supported by the arm of the sewing machine and has a needle at the lower end thereof. The mechanism further includes a rack fixed to the needle bar, a pinion rotatably supported by the arm of the sewing machine and engaged with the rack, a cam integral with the pinion, a first link having an end pivotally supported by the arm of the sewing machine and a middle portion connected to a roller which rides on the surface of the cam, and a second link having an end pivotally supported by the cloth presser. The other end of the second link is pivotally connected to the other end of the first link.

Abstract: A sewing machine which is used with manual feed movement of a sewing material has a holding device for the material that is effective during the first phases of stitching of a seam section, by which the first thread knot is held from becoming undone when short thread ends and a large feed movement are used. In a first embodiment, the holding device includes a holding foot, by a drive mechanism in addition to a presser foot which is periodically moved up and down by a drive mechanism, and a controllable drive for the holding foot. In a second embodiment, the holding device includes a presser foot, a compression spring and a decoupling mechanism by which the presser foot can be disconnected from its drive mechanism.

Abstract: A sewing machine operating station which cooperates with an overhead conveyor system having a number of trolleys which convey partly-formed garments between working stations, each trolley having a delivery arm from which garments can be suspended, and delivered to a working station. Each working station comprises a table, a sewing machine mounted on the table, and a working surface adjacent to the sewing machine and onto which a partly-formed garment can be placed in order to undergo a sewing operation. An inverted L-shaped guide is mounted on the table and can be coupled-up with the delivery arm of a trolley so as to guide a supply of partly-formed garments, suspended therefrom, to a position adjacent to the working surface.

Abstract: A sewing machine with a workpiece feed comprises a feed dog positioned below the workpiece providing a four-motion feed movement. A presser foot is fixed to a presser foot bar and can be raised from the workpiece during the stitching cycle by a lifting gear to ensure turning of the workpiece. This makes it possible to follow complicated seam patterns. The lifting gear is constructed in such a way that the presser foot is raised from the workpiece while the needle perforates the material, during its downwardly directed movement approximately up to its bottom dead center position.

Abstract: A presser attachment device for implementing needle feed in which a presser foot is elevated when a sewing needle is in engagement with work material to facilitate lateral shift thereof by the sewing needle. The presser foot is supported on one end of a substantially centrally pivoted presser foot carrier lever, the other end of which is formed with a gear segment. A pinion and ratchet combination is supported on one end of a pinion carrier lever, the other end of which is carried on the presser foot carrier lever pivot and has a pinion portion thereof in engagement with the gear segment. A combined cam and pawl is provided in which a pawl portion is in engagement with a ratchet portion of the combined pinion and ratchet when the sewing needle extends through the work material so as to lock the pinion against further rotation, depress the pinion and rotate the presser foot carrier lever to elevate the presser foot out of contact with the work material.

Abstract: A stitching head for a stitching or embroidering machine for forming stitches fixed to the machine by a support including at least one needle which is associated with a main presser foot having a pressing heel. The stitching head has an auxiliary presser foot which is independent of the main presser foot and has a heel pierced with an opening. The auxiliary presser foot is mounted for sliding, with respect to the support, along an axis parallel to the needle, whereby its heel is disposed in the path of the downward movement of the main presser foot parallel to and spaced apart from the pressing heel of the main presser foot, while having its opening situated in the path of the needle. A helical spring is mounted for permanently urging the auxiliary presser foot toward the main presser foot.

Abstract: Presser-foot apparatus is disclosed which is capable of automatically adjusting to various levels of sewing. The presser-foot is slidably held within a housing affixed to a needle bar. The presser-foot is biased against the housing so as to move in conjunction therewith until contact is made with the workpiece. The presser-foot exerts a steady, unvarying pressure on the workpiece while the needle associated therewith continues downwardly. The presser-foot is ultimately lifted from the workpiece during the upward retraction of the needle from the workpiece.

Abstract: A material hold-down device, cooperative with the stitching needle bar of a stitching machine, and employing a template that retains layers of material to be stitched. The hold-down has a vertical tubular cylindrical sleeve in sliding bearing relationship with the reciprocal cylindrical needle bar, a laterally projecting mounting portion extending therefrom, and an elongated lower hollow nose coaxial with the sleeve, of smaller diameter than the sleeve, and joined thereto by a frustoconical juncture. The sleeve has an open side of less than 180.degree. extent, leaving the remaining wall portion greater than 180.degree., and has a smaller opening opposite the open side, for access to the needle and needle bar.