Abstract:
The structure is formed by superposed layers of fibrous reinforcing material, which layers are bound together by threads implanted through the layers by being pushed by a pressurized fluid into a tubular needle which is actuated with back and forth movements during which it penetrates through the superposed layers and is pulled out therefrom, leaving in a portion of binding thread, the next portion of binding thread being positioned after a relative displacement of the needle with respect to the structure along the surface thereof.
Abstract:
A lockstitch sewing machine utilizing a needle looper to extend upwardly through a work material to grasp an upper thread and pull it downwardly through the work material to a looptaker which casts the upper thread about a lower thread in order to form a lockstitch. When the needle looper is in an upper position to catch an upper thread, a hook needle is exposed and thread is deflected into the hook thereof. As the needle looper is retracted to a depressed position the hook needle is moved to a guard position so as to retain the upper thread therein during transit. When the needle looper is at its lower position, the hook is again exposed to release its thread to a looptaker for concatenation with a lower thread.
Abstract:
A sewing device includes a material wrapped around a spool (the spool rotating around an axis), and a needle with a hole through which the material passes. A material feeding mechanism moves the needle and feeds the material in a feeding direction, thereby unraveling the material from the spool and stitching the material into a workpiece. A controller controls the material feeding mechanism to move the needle to a first rest position above a top surface of the workpiece. The first rest position is determined by the following formula: PR1=PW1+AT; wherein PR1 is the first rest position; PW1 is a first position of the top surface of the workpiece; and AT is an amount of material to be used in forming a second stitch in the workpiece after forming a first stitch in the workpiece.
Abstract:
A sewing cartridge includes a housing case and an openable cover. The housing case has a housing area for accommodating a thread therein, and the openable cover has a thread holding mechanism for holding the thread supplied from the housing area. In the sewing cartridge, the housing case is movable with respect to the openable cover. While the thread supplied from the housing area is hold, the sewing cartridge is attached to a sewing apparatus. In this state, when the housing case is moved up and down with respect to the openable cover, a predetermined length of the thread can be drawn from the housing area while the thread holding mechanism holds the thread with an adequate holding strength.
Abstract:
A patterned cloth is made by which a pattern is formed on a surface of a work cloth by passing a thread through the work cloth a number of times and forming a plurality of free loops on the reverse side of the work cloth. A double-sided adhesive tape is provided to fix the free loops on the reverse side of the work cloth. The work cloth has an elastic film member, the elastic film member allowing the free loops to be retained on the reverse side of the work cloth.
Abstract:
A sewing apparatus performs sewing operation on a work piece that moves along an X-Y plane perpendicular to an axial direction of a hollow needle having an inclined opening that is formed by angular cutting a portion of an end portion of the hollow needle that penetrates the work piece with respect to the axial direction of the hollow needle, by reciprocating the hollow needle in a penetrating direction, using a thread threaded in the hollow needle. In the sewing apparatus, Tatami stitches are formed on the work cloth with a plurality of stitches. First, a plurality of stitches are formed in a first stitching direction along a line angled between 20° and 160° with respect to a needle tip opening direction. Then, by controlling direction of movement of the work cloth so that the stitches in a second stitching direction proceed to an area opposite to the needle tip opening direction, a plurality of stitches are formed in a second stitching direction opposite to the first stitching direction, following and in parallel with the stitches formed in the first stitching direction.
Abstract:
A patterned cloth is made by which a pattern is formed on a surface of a work cloth by passing a thread through the work cloth a number of times and forming a plurality of free loops on the reverse side of the work cloth. A double-sided adhesive tape is provided to fix the free loops on the reverse side of the work cloth. The work cloth has an elastic film member, the elastic film member allowing the free loops to be retained on the reverse side of the work cloth.
Abstract:
A method and device are disclosed for forming reinforcement elements from resistant fibers distributed along three dimensions, in which method, a continuous fiber is introduced in a substrate resting on a support formed of such fibers crossed in at least two directions, by stitching, from the free face of said substrate opposite said support by means of a needle driven with a reciprocal movement, a relative movement being in addition generated between said support and said needle so that said continuous fiber is formed inside said substrate of a succession of consecutive segments forming a zig-zag line.The invention is remarkable in that:said needle is curved and imposes on each segment of said continuous fiber a similar curved form; andthe reciprocal movement of said curved needle occurs while rotating about an axis perpendicular to the plane of said needle and disposed on the concave side thereof.