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:
Dec. 05, 1978
Filed:
Aug. 02, 1977
Bengt A Wennerblom, Pitea, SE;
SCA Development Aktiebolag, Sundsvall, SE;
Abstract
A method is provided for controlling the amount of active substance applied to the surface of a continuously-moving paper web, with the active substance being dissolved in or dispersed in a treating liquid. The paper web is passed over a coating unit and includes an opening through which the treating liquid is applied to the paper web. The method includes the steps of supplying a first fluid with a predetermined amount of active substance to a first batching device and supplying a second fluid consisting of pure solvent or dispersing agent to a second batching device. The output of the first batching device is controlled in response to the speed of the paper web to control the amount of active substance supplied to a mixer, and the output of the second batching device is controlled in response to the fluid pressure at the opening of the coating unit to control the amount of solvent or dispersing agent supplied to the mixer. Then, the outputs of the first and second batching devices are mixed to form the treating liquid, which is then supplied to the opening of the coating unit so that the paper web is completely covered with treating liquid even in sections of the paper web where the surface roughness is relatively high, as compared to the remainder of the paper web.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile