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US 4,564,551 AGranted
Wet-pressing belt for paper machines
AssigneeThomas Josef Heimbach GmbH & Co.
InventorWalter Best
Life of this patent
Estimating the term…
Abstract
A belt to be used in paper-machine wet-pressing, in particular in a machine with an extended pressing gap, includes a flexible, liquid-impermeable belt stratum which is smooth on its back side. This belt is improved by providing the front side of the belt stratum (2,12,25,36) with a structured surface with open longitudinal and/or transverse channels (9,14,30,41), for the purpose of water drainage, which cannot be squeezed, or only insignificantly, under press compression.
Claims20
A paper machine dehydration belt, comprising:
- (a) a liquid impermeable belt stratum;
- (b) a plurality of consecutively arrayed water drainage channels disposed along a first face of said stratum for draining water away therefrom;
- (c) each of said channels defined by a plurality of adjacently disposed filamentary loops and each of said loops having a portion thereof disposed in said stratum and a portion extending beyond said first face;
- (d) each of said loops comprised generally of substantially straight first and second legs and end portions connecting the legs;
- and,
- (e) each loop of a channel having an end portion disposed between and pivotally connected by means with the end portions of the adjacent loops of the adjacent channels so that the loops of said channels are successively disposed with clockwise and counterclockwise pitches.
3 more elements
A dehydration belt for extended pressing gaps of paper machines, comprising:
- (a) a liquid impermeable belt stratum;
- (b) a plurality of individual filamentary loops, each of said loops having first and second substantially straight leg portions and arcuate end portions associated therewith for connecting the legs of a loop;
- (c) said loops disposed in a plurality of generally aligned consecutively disposed rows and with the first leg of each loop embedded in said stratum and with the second leg thereof disposed above said stratum so that said second legs and said end portions cooperate with the outer face of said stratum for providing a plurality of drainage channels;
- (d) the loops of each row disposed in spaced parallel relation;
- (e) the loops of each row being angularly disposed relative to the loops of the immediately precedent and subsequent rows so that the loops of said channels have an alternating clockwise and counterclockwise orientation;
- (f) the end portions of the loops of each row overlap and provide a plurality of openings;
- and,
- (g) means extend through said openings and pivotally interconnect said loops of each of said rows.
5 more elements
Dependencies are inferred from the claim text.