Limp material segment transport apparatus for sewing machines
US5065684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | May 15, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05B21/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is an apparatus for transporting a limp material segment, such as cloth, along a reference axis parallel to a planar work surface. The apparatus includes a base member positioned above a work surface. A four-bar linkage assembly couples a segment coupling assembly to the base member. The four-bar linkage assembly includes first and second elongated bar assemblies, each being pivotally coupled to the base member. The length of the second bar assembly is controllable within a predetermined range. A third elongated bar assembly is pivotally coupled at a first end to the segment coupling assembly, at a second end to the second bar assembly, and at an intermediate point to the first bar assembly. In addition, the apparatus includes a rotary actuator for selectively rotating the second bar assembly about a pivot axis extending through its point of connection to the base member. When the second bar assembly is in its retracted state, as that assembly is rotated by the rotary actuator, the segment coupling assembly travels along a substantially straight path substantially parallel and adjacent to the reference axis. Furthermore, when the second bar assembly is in its extended…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.