Feed device equipment for letting out hides
AssigneePfaff Industriemaschinen GmbH
InventorHerbert Dietrich
Life of this patent
Estimating the term…
Abstract
Equipment for letting out hides, in which the hides are cut several times obliquely to their lateral edges, the hide parts are then laterally offset and then sewn together again. A gripping tool is provided and is movable crosswise and lengthwise to the cutting line. After the sewing operation, the gripping tool seizes the cut edge and pulls the hide crosswise to the cutting line by the desired distance between cuts. Thereafter it moves the hide parallel to the cutting line, to obtain a constant distance between the sewing machine and the respective seam start on the hide.
Claims10
A device for letting out a hide to be cut and sewn at seam areas extending in a longitudinal direction and at an angle to an edge of the hide, comprising:
- a pair of clamping jaws for clamping the hide at each seam area;
- jaw drive means for moving the jaws laterally of the longitudinal direction to clamp the hide at each seam area;
- a parting sword movable between the jaws and extending in a longitudinal direction, said parting sword including a hide hair divider for parting hair on the hide to form a furrow therein;
- sword drive means connected to said printing sword for moving said sword in the longitudinal direction to form the furrow and upwardly to push the hide at each seam area between said jaws;
- cutting means for cutting the seam area after it is clamped by said clamping jaws;
- backspacing means connected to at least one of said jaws for moving said jaws with respect to each other for a first selected amount in the longitudinal direction;
- a sewing machine for sewing the seam area after said jaws are moved by said backspacing means and the seam is cut by said cutting means;
- a seam gripper for gripping the seam after it is sewn by said sewing machine and moving the seam downwardly of said clamping jaws and laterally of said longitudinal direction by a second selected amount corresponding to a distance between adjacent seam areas on the hide;
- and
- gripper drive means for moving said seam gripper downwardly and transversely of the longitudinal direction for repositioning the hide to bring an additional seam area thereof into alignment with said parting sword.
In equipment for letting out hides having a holding device for the hide, two clamping jaws cooperating like pliers and movable relatively to each other in a longitudinal direction, a parting sword arranged between the jaws with a forwardly positioned hide hair divider, a cutting device for cutting the hide and a sewing machine for sewing the cut edges of the hide, an improvement characterized by the arrangement of a gripping tool which grips the hide by the cut edges, and means for moving the tool up and down and displacing the tool in a horizontal plane crosswise to the parting sword.
A method of letting out a hide to be cut and sewn at a plurality of equally spaced seam areas comprising:
- placing the hide hair side down on a table having a slit therein extending in a longitudinal direction parallel to the seam areas to be cut and sewn;
- passing a parting sword through said slit and into contact with the hide for parting hairs of the hide in the vicinity of the slit and forming a furrow in the hide hairs;
- providing a pair of clamping jaws over the hide having a space therebetween aligned with the slit;
- pushing the hide upwardly through the space between the jaws to form a seam area;
- moving the jaws together to clamp the hide in the seam area;
- cutting the hide in the seam area;
- backspacing one of said jaws with respect to the other in the longitudinal direction to offset the cut hide in the seam area thereafter sewing the hide in the seam area;
- gripping the hide at the sewn seam area;
- moving the jaws apart to unclamp the seam area;
- moving the gripped seam area downwardly and laterally of said slit in a direction transverse to said longitudinal direction by an amount corresponding to the equal space between seam areas;
- and
- using the parting sword to produce an additional furrow in the hide in an additional seam area.
Dependencies are inferred from the claim text.