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US 4,173,191 AGranted
Sewing unit with sectionwise shiftable clamping device
AssigneeEisele Apparate-und Geratebau GmbH
InventorHermann Taddicken
Life of this patent
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AssigneeEisele Apparate-und Geratebau GmbH
InventorHermann Taddicken
Estimating the term…
A device for feeding materials in a feed direction for operations thereon, such as sewing buttons or buttonholes, either directly on the material or onto separate strips of material which are fed thereto. The device includes means for clamping the material which is to be sewn so that it does not shift as it is moved through a stitching area. A movable carriage is mounted on a support frame for movement backwardly and forwardly in respect to the direction of material feeding, and it carries a lower endless conveyor arranged beneath and cooperable with an upper endless conveyor so that the endless belt stretched thereon may be biased together during the feeding operation so that the material is clamped along its entire length as it is fed with the movement of the carriage. The apparatus includes a separate clamping device for clamping the forward edge of the material at the end thereof which is beyond the sewing needle operating area and this is also movable with the carriage. The carriage is moved by a friction feed arrangement which includes a rotatable drive shaft which is engaged by a friction drive carried by the carriage and which includes rollers which may be oriented so as to bear against the shaft at an angle on its periphery so as to cause an advancing movement of the friction drive with the carriage at a rate controlled by the positioning of the friction rollers.
A device for feeding materials in a feed direction for operations on the materials, such as sewing, comprising, a support frame, a carriage mounted on said frame for movement backwardly and forwardly in respect to the feed direction of the material, a lower endless conveyor extending in a feed direction comprising longitudinal guide rollers and an endless belt trained over said rollers supported on said carriage, and upper endless conveyor belt extending in the feed direction and disposed over and cooperable with said lower endless conveyor and comprising longitudinally spaced guide rollers and an endless belt trained over said rollers supported on said carriage, biasing means biasing said upper and lower endless conveyors together for clamping the material therebetween along a considerable length of the material and for feeding the material in the feed direction, and drive means connected to said carriage for driving said carriage to move the material in predetermined timed relationship to the operations to be performed thereon.
A machine for sewing buttonholes and buttons onto garments which are moved past a reciprocating needle which overlies a stitching area in which a button is clamped at the area for sewing to the garment, comprising, a support frame having a table portion over which the material is advanced, a guide rod carried by said support frame, a carriage movable along said support frame in a direction to the stitching area and away from the stitching area, first and second endless conveyors arranged in overlying relationship and extending in the feed direction being engageable with the material to be fed along the length of the material, means for biasing said first and second conveyors together to clamp the material therebetween, and drive means connected to said carriage for shifting said carriage with said first and second conveyors along the feed path.
Dependencies are inferred from the claim text.