Case for book with pressure sensitive resilient spine pad
US3964770A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1975 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Feb 3, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D3/002
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
By means of only slightly modified case making equipment, a hard case for a book is provided with a pad which is attached to the spine edge of an uncased book by pressure-sensitive adhesive. This pad comprises a strip of foam of a material such as polyurethane of a length substantially the same as that of the cover boards for the case and a width slightly less than the gap between adjacent boards which is fastened to the cover material by the same adhesive which causes the cover material to adhere to the boards. In order to provide a non-porous surface for the foam, the latter may be covered by a layer of vinyl, the latter being of the same length and width as the pad and stuck thereto by a suitable adhesive. A layer of pressure-sensitive adhesive material is applied to the vinyl and a protective release paper covers the pressure-sensitive adhesive. The adhesive and release paper are spaced inward at top and bottom from the top and bottom edges of the boards. In production of the case the top and bottom of the cover material are turned in to cover the edges of the boards and such turn-ins also cover the ends of the pad but not the release paper. In use, the release paper is strippe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.