The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 1979
Filed:
Jun. 13, 1977
Applicant:
Inventor:
Jurgen Gutzeit, Ravensburg, DE;
Assignee:
Sulzer Brothers Limited, Winterthur, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21F / ; D21F / ; D21F / ;
U.S. Cl.
CPC ...
162252 ; 162253 ; 162254 ; 162259 ; 162263 ; 162317 ; 162337 ; 162340 ; 162364 ; 241 33 ;
Abstract
A papermaking machine having pulp supplied in a regulated excess amount through a feed channel onto a movable water-pervious element and having a sump positioned at the end of the feed channel to receive the overflow. The amount of pulp in the sump relative to the desired overflow rate is used to produce a control signal for regulating the machine. Should there be an excess amount of pulp in the sump over the desired amount, the negative pressure in the vacuum box is increased to withdraw more water. Also, the degree of grinding of the pulp can be varied in dependence on the control signal.