Apparatus for high speed size application
AssigneeBeloit Corporation
InventorRobert J. Alheid
Life of this patent
Estimating the term…
Abstract
An apparatus for the application of a sizing composition or the like to a traveling web under high speed conditions which involves passing the web into the nip formed between two counter-rotating rolls and supplying a sizing composition to the nip to thereby form a pond of sizing material on both sides of the traveling web. Additional amounts of sizing material are constantly being supplied to the ponds by means of a suitable applicator and nozzle arrangement, while the depth of the ponds is controlled continuously by the application of a reduced pressure to the existing ponds resulting in some of the sizing composition being drawn up into the applicator from where it is delivered to a reservoir for further circulation through the applicator.
Claims4
An apparatus for applying a sizing composition or the like continuously to both sides of a paper web which comprises:
- a pair of counter-rotating rolls defining a nip therebetween,
- means for directing a paper web through said nip,
- a pair of applicator means, one on each side of said web,
- each applicator means including:
- a housing,
- a baffle within said housing dividing the interior of said housing into isolated parallel fluid flow passages, terminating near said nip,
- a distributor arranged to deliver sizing composition into one of said flow passages for forming a pond of sizing composition at said nip,
- a reservoir for sizing composition,
- means connecting said reservoir to one of said flow passages,
- vacuum means connected to the other of said flow passages for withdrawing sizing composition from said pond, and
- means for delivering the sizing composition thus withdrawn back to said reservoir.
Dependencies are inferred from the claim text.