Process and apparatus for bonding and embossing sheet materials, particularly fiber matting
US4902366A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jan 11, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/69
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process and apparatus for bonding and embossing of sheet material is disclosed. The apparatus uses a pair of rotating calender rollers which are spaced apart. Sheet material is introduced into the space between the rollers. The calender rollers are equipped with raised, discrete points which form a surface design and determine the embossing design produced on the sheet material. The calender rollers are each driven at a synchronous speed by a drive system having the capability of varying the speed of one roller for a short period of time. This change in speed causes the surface designs of both calender rollers to shift relative to one another. This results in different degrees of overlap between opposing pairs of raised points. Thus, different embossing surface patterns can be produced as the overlapping areas are adjusted while the machines are in operation. This eliminates the necessity of replacing the calender rollers when a change of embossing patterns is desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.