Moulded footwear
US6168741A · kind A · utility
Inventor
Key dates
| Filing date | Dec 3, 1998 |
| Grant date | Jan 2, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D35/081
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mould (14) for manufacturing an article of footwear comprises two mould halves (16); a hollow last (20) which includes a cylindrical downwardly open opening (30) at its foot end (26); and a first sole plate (34) which includes a projection (32) having a head portion (36) which is arranged to extend into the opening (30) in the last (20) in order to restrict movement of the last within the mould. Polyurethane is injected into cavity (44) defined between the last and mould halves (16)/sole plate (34) to form an inner sole of an article of footwear having a hole in it in a position where projection (32) cooperated with opening (30). This opening may then be plugged prior to the formation of an outer sole using a second sole plate (which does not include a projection (32) instead of the first sole plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.