Device for forming a doubly turned hem
US4660486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1986 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Feb 12, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD05D2207/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A device for forming a doubly turned hem on lengths of fabric with a folding sleeve, in the inner space of which a flexible sheet is provided as auxiliary folding device, which presses the fabric against the guiding surface of the folding sleeve and, as the start of fabric is pushed through the folding sleeve, constantly follows its cross-sectional shape. The effective area of the auxiliary folding device can have a fur-like surface, the pile of which is aligned in the direction of advance of the material to be sewn. In order to open a gap for the unimpeded introduction of the edge of the fabric, a shaped metal plate, by means of which the auxiliary folding device is coiled, is movable between the guiding surface of the folding sleeve and the auxiliary folding device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.