Method and apapratus for forming a matte finish on resin-coated webs or sheets
US4954297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0024
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glosser, and method of glossing, includes a belt-type glosser in which resin-coated web or sheet material is pressed or molded against a casting surface of the belt under heat and pressure, and is thereafter removed. A matte surface is provided by forming a non-locking grooved pattern on the casting surface of the belt in the form of a diffraction grating. The grating configuration is formed with a series of lands, separated by grooves or depressions, in which the side walls of the depressions are tapered to provide a valley narrower at the bottom than at the top adjacent the land surfaces so as to be free of resin-trapping overhanging projections or portions. The spacing between the grooves may be randomized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.