Back to results
US 4,543,737 AGranted
System for distributing steam on a paper web
AssigneeMeasurex Corporation
InventorMathew Boissevain
Life of this patent
Estimating the term…
Abstract
The specification discloses a steam distributor having a chamber to contain steam on one side of a paper web and a vacuum box on the opposite side of the paper web. The chamber has a vacuum release means to prevent the chamber from being pulled onto the paper web if vacuum is applied when steam is not applied.
Claims7
A system for distributing steam on a paper web, the system comprising:
- (a) a hood located to one side of the paper web;
- (b) means to introduce steam into the hood;
- (c) vacuum box means located to the side of the web opposite said hood to apply a vacuum to the web;
- (d) vacuum release means coupled to said hood to:
- (i) provide a space between the paper web and the vacuum release means, the space having a predetermined first height to restrict the flow of air into said hood when steam is being introduced to said hood;
- and
- (ii) provide a space between the paper web and the vacuum release means, the space having a height greater than the predetermined first height to permit a substantial flow of air to enter said hood when vacuum is applied to said vacuum box means while steam is not being introduced into said hood.
4 more elements
Dependencies are inferred from the claim text.