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Method and installation for supplying a sewing machine
| Details |
Inventors: Helffer, Bernard; Raisin, Jean-Pierre;
Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR) (FR)
Primary Examiner: Schroeder; Werner H.
Assistant Examiner: Falik; Andrew M.
Attorney, Agent or Firm: Poms, Smith, Lande & Rose
The present invention relates to a method and installation for supplying a machine for linear treatment such as a sewing machine for joining flexible elements such as textile pieces, said method comprising the steps of gripping at least one flexible element by a gripping zone thereof and placing and maintaining this gripping zone at a predetermined fixed spot by means of a first gripping device (fixed clips); gripping the flexible element by said gripping zone thus positioned by means of a second gripping device (carriage provided with clips); displacing the flexible element by means of the second gripping device up to driver members of the machine for linear treatment. |
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DETAILED DESCRIPTION The present invention, in a broad aspect, provides an apparatus between a sewing (or joining) machine, and an operator, which transfers two partially overlapping pieces of fabric from the operator's hands to the sewing machine as soon as the operator has assembled the fabric pieces in the relationship to be made permanent by the sewing.
Accordingly, the previous need for the operator to assemble the fabric pieces in a certain relationship and to manually transport the assembled pieces to the sewing machine, while maintaining that relationship, is eliminated.
More particularly, the apparatus only requires the operator to assemble the two pieces of material to be sewn and to position the pieces vertically in front of her.
A first gripping device, which comprises a plurality of downwardly-oriented clips on a horizontally-disposed crossbar movable vertically between two supports, takes the pieces from the operator's hands and moves them to a position above the operator.
When the first gripping device has so transported the fabric, a second gripping device, which comprises a second plurality of clips on a platform adapted for rotative and translative movement, rotates toward the first gripping device and latches onto the fabric pieces.
At this time, the first gripping device releases the fabric and moves slightly upward to allow the second gripping device to rotate, with the attached fabric, away from the first gripping device.
The first gripping device then moves back down toward the operator to take two more pieces from the operator.
Meanwhile, the second gripping device moves the transfer or drive portion of the sewing machine, which comprises a table disposed between the platform and the clips, and two pneumatically operated presser bars cooperating with a feed dog.
The presser bars are initially positioned off the table thereby allowing the clips of the second gripping device to drag the material along the table and under the presser bars.
When this has occurred, the presser bars move toward the table and engage the fabric
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