Web feed guide apparatus
US6047873A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1999 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Mar 22, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/111
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In an apparatus for feeding and delivering a thin web in a longitudinal direction, a web guide for precisely controlling the lateral position of the web includes an assembly formed of a platen and mating cover. The platen is provided with an upper surface having a shallow channel formed therein, the channel being sufficiently deep to receive the thickness of the web. The channel includes opposed parallel edges, either one of which may be designated a reference edge. The channel is dimensioned to be wider than the thin web or film. The platen includes a plurality of shallow grooves extending laterally across the upper surface of the platen and the bottom surface of the channel and spaced longitudinally therealong. The cover includes a generally planar bottom surface that mates with the platen to seal the top of the channel. Air is introduced into the shallow grooves at like ends thereof that are opposite the designated reference edge of the channel. The web is fed longitudinally through the channel, and the lateral air flow through the shallow grooves urges the web toward the reference edge. The low pressure air flow may be adjusted so that the edge of the web abuts the reference ed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.