Machine for automatically roughing the cement margin of a footwear upper assembly
US4756038A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Sep 21, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA43D37/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus (and method) for automatically roughing the cement margin of a shoe or other footwear assembly, which footwear upper assembly includes an upper mounted on a last and an inner sole disposed upon the bottom of the last and connected to the upper. The apparatus (i.e., a roughing machine) typically includes a disc-shaped wire wheel (or other roughing tool) positioned with the plane of the brush approximately perpendicular to the cement margin at the region of contact between the two. The roughing machine includes a mechanism to receive the upper assembly and provide some combination of movements between the upper assembly and the periphery of the wire wheel to achieve a constant region (or area) of contact between the two as the cement margin moves with respect to the wire wheel in the course of roughing. The wire wheel is supported at one end of an intermediately pivoted action arm; a load measuring beam is connected to the other end of the action arm to provide electrical signals proportional to or representative of the pressure force between the wire wheel and the cement margin at the region of contact. A servo-valve actuated air cylinder drives the action arm to load the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.