Abstract: A blind stitch sewing mechanism for a sewing machine includes a curved, oscillating needle, and a looper, having only one degree of freedom, for cooperatively forming a blind stitch with the curved oscillating needle.

Abstract: A blind stitch sewing mechanism includes a sewing head (10) with a carrier (20), a needle shaft (34) rotatably supported on the carrier (20), which needle shaft is connected with a needle holder (36) radially extending from the needle shaft for holding an arc shaped needle curved about the axis (38) of the needle shaft (34), a needle drive (56, 58, 44, 42) for moving the needle (40) back and forth, a loop catcher (74) moveably supported on the carrier (20) for receiving a thread loop formed by the withdrawal of the needle from the work material, a catcher drive for moving the loop catcher (74) in timewise coordination with the movement of the needle (40), and a device (14) creating a relative movement between the sewing head (10) and the work material, the loop catcher (74) being formed for a back and forth movement perpendicular to the movement path of the needle (40) and the device (14) creating a relative movement between the sewing head (10) and the work material being so formed that the created sewn seam

Abstract: A blind stitch sewing mechanism includes a sewing head (10) with a carrier (20), a needle shaft (34) rotatably supported on the carrier (20), which needle shaft is connected with a needle holder (36) radially extending from the needle shaft for holding an arc shaped needle curved about the axis (38) of the needle shaft (34), a needle drive (56, 58, 44, 42) for moving the needle (40) back and forth, a loop catcher (74) moveably supported on the carrier (20)for receiving a thread loop formed by the withdrawal of the needle from the work material, a catcher drive for moving the loop catcher (74) in timewise coordination with the movement of the needle (40), and means (14) creating a relative movement between the sewing head (10) and the work material, the loop catcher (74) being formed for a back and forth movement perpendicular to the movement path of the needle (40) and the means (14) creating a relative movement between the sewing head (10) and the work material being so formed that the created sewn seam runs

Abstract: A composite component is made up by laying pre-forms one on top of the other and tacking the pre-forms together at spaced, discrete locations by blind stitches which tack an upper pre-form layer to the one beneath it, using a stitching head. The stitching head 16 includes a curved needle 18 reciprocally movable in one plane and a looper 30 reciprocally movable in a transverse plane. In use the looper catches the thread from the needle as it emerges from the material and draws it into a loop around the next entry point for the needle.

Abstract: An improved method and apparatus for the assembly of pillow-top mattress covers. In the method of this invention, the gussets for a pillow-top mattress cover are prepared in a single step in which the gusset material is folded longitudinally, and the flange material is attached thereto and the gusset material is sewn together in one stitch. Thereafter, a gusset is attached to each of the top and bottom panels of the cover along its outer edge. Each gusset is secured to the underside of its associated top or bottom panel at the folded edge using a blind stitch which is not visible externally of the panel. No gluing is required. During the step of attaching the gusset to its associated mattress cover panel, precisely positioned mitered corners are formed on the gusset where the gusset is to be attached to the corner of its associated panel.

Abstract: An improved method and apparatus for the assembly of pillow-top mattress covers. In the method of this invention, the gussets for a pillow-top mattress cover are prepared in a single step in which the gusset material is folded longitudinally, and the flange material is attached thereto and the gusset material is sewn together in one stitch. Thereafter, a gusset is attached to each of the top and bottom panels of the cover along its outer edge. Each gusset is secured to the underside of its associated top or bottom panel at the folded edge using a blind stitch which is not visible externally of the panel. No gluing is required. During the step of attaching the gusset to its associated mattress cover panel, precisely positioned mitered corners are formed on the gusset where the gusset is to be attached to the corner of its associated panel.

Abstract: An improved blind stitch sewing machine includes a machine table, a main housing fixed on the machine table, a head housing located at one side of the main housing, a needle mechanism unit coupled with the head housing, a driving unit coupled with the machine table and adapted to drive the needle mechanism unit, and a fabric pushing member coupled with the driving unit. The driving unit includes a main shaft, an auxiliary shaft, a first transmission assembly and a second transmission assembly. The main shaft is journalled on the main housing and is drivable to effect a unidirectional rotation. The first transmission assembly interconnects the main shaft and the auxiliary shaft so as to convert the uni-directional rotation of the main shaft into reciprocal rotation of the auxiliary shaft. The second transmission assembly interconnects the auxiliary shaft and the fabric pushing member so as to convert the reciprocal rotation of the auxiliary shaft into reciprocal vertical movement of the fabric pushing member.

Abstract: A down type static folder is provided for folding the edge of a garment during hemming. The folder is mounted--such as by a pivot post and latch--in a specific predetermined position on an automatic sewing machine head. The static folder is preferably mounted in place of a conventional cloth plate on the sewing machine head. The static folder includes a plate with a tongue for holding the folded over edge of the garment in a specific relationship with respect to the needle of the sewing machine during hemming. The tongue is in very close proximity to the needle (e.g. 0.0012-0.0015 inches). A flared portion of the folder automatically opens up the blank after hemming. By utilizing the invention it is possible to provide a perfect blind stitch in a T-shirt sleeve or the like.

Abstract: The invention concerns a blind stitch sewing machine with an oscillating fabric deflector to make the sewing material bulge into the arcuate path of the arc needle. The minimum spacing of the deflector relative to the arc needle can be adjusted in relation to the thickness of the sewing material detected by a sewing material sensor. A stepping motor is provided to adjust this minimum spacing. A stepping motor control circuit is connected to the sewing material sensor, and to a contact pickup for the arc needle and fabric deflector, the stepping motor being controlled in such a manner that, upon a control circuit start signal, it moves into a particular start position and proceeds during the ensuing sewing by one step per stitch reducing the minimum spacing of the fabric deflector until the contact pickup emits a contact signal relative to the arc needle and the fabric deflector during a measurement window signal.

Abstract: In a sewing machine which stores stitch control signals in an electronic memory composed with a microcomputer, incorporated therein are a stitch selecting device, a blindstitching depth setting device and a blindstitching width setting device which are both independently set by operation of said stitch selecting device. When a blindstitching pattern is selected, said depth setting device and width setting device are made operative, and needle dropping left positions are set by said depth setting device, and right dropping positions or whole amplitudes are set by said width setting device, and they are input to the memory for forming the blindstitching patterns by the stitching control signal of the blindstitching pattern.

Abstract: The blind-stitch sewing machine includes a fabric bender adjustable between a sewing position wherein the material being sewn will bulge into the arcuate trajectory of the arc needle and a release position allowing the material to be sewn to be inserted and respectively the material having been sewn to be removed, this adjustment being effected through a rocker shaft. This rocker shaft cooperates with a stop defining the sewing position of the fabric bender. The stop is adjustable for setting the stitch-depth of the arc needle into the particular material to be sewn in order to assure a corresponding distance of the fabric bender in the sewing position from the trajectory of the arc needle.

Abstract: A chain-stitch blind stitch sewing machine having an arcuate needle to oscillate about an axis such that it passes through material to be sewn. An adjustable stitch loosening finger is attached to the sewing machine such that its position may be adjusted between a thread engaging position and a non-operative position. In its thread engaging position, the finger contacts the thread during the formation of each chain-stitch between two entry sites of the needle to form an additional free thread loop. A relatively loosely sewn point is thereby obtained. When the finger is in its non-operative position, the thread between the two entry sites will rest against the material being sewn to form a tightly sewn point.

Abstract: A device for holding fabric pieces for blind stitch sewing. A rod which presses fabric pieces together and performs vertical reciprocating motions in synchronism with needle motions is adjusted by a level regulator which changes the lowest return point of the rod to adapt to different thicknesses of the fabric pieces being sewn.

Abstract: An improved mechanism for producing blind stitches with a household sewing machine, including a removable throat plate having a thread deflecting member reciprocatorily driven into engagement with a loop of thread carried by the loop taker to insure engagement of the loop of thread by a hook needle. The thread deflecting member is driven in timed relation to the rising and falling motion of the feed dog by a cam which is fastened to the feed drive shaft.

Abstract: Force is delivered from a looper drive crank to a nut and bolt assembly having clamped thereto the inner races of first and second bearing sets. A spacer separates the bearing sets. The outer races of the bearing sets are press fit into the bore of a housing from which force is transmitted to a looper link.

Abstract: This disclosure relates to a thread cutter for effecting the cutting of a thread at the termination of a sewing action with a sewing machine. The thread cutter is particularly effective on synthetic threads, such as nylon and monofilament, which are more difficult to cut than cotton thread. The thread cutter includes a pair of relatively movable blades having a scissor action to produce an effective thread cutting operation. The thread cutter is very compact and does not require any bulky attachment on the arm of the machine, as is usually required.