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:
Apr. 23, 1991
Filed:
Oct. 17, 1989
Goran Hanerus, Malmo, SE;
Tommy Ljungstrom, Hoor, SE;
Abstract
A method of venting a plant for filling containers (2) with an apportioned quantity of liquid without air inclusions by means of a dispensing pump (9) in which two control valves (11', 12') disposed at the outlet from a filler pipe (4) are intermittently opened and closed, the liquid (17) being supplied via a buffer container (13). To avoid faulty filling at the start of the filling operation during the forward run of product, and in order to be able as far as possible to determine an exact switch-on time for the actual filling process, it is according to the invention envisaged that for venting the filler pipe (4) and the dispensing pump (9) connected thereto, two serially connected control valves (11',12') are so controlled separately from each other that upon creation of the vacuum in the buffer container (13) both control valves (11', 12') are opened; after the major part of the air has bubbled out upwardly, firstly the upper control valve (12') and after an adjustable period the lower control valve (22') are closed after which the upper control valve (12') is opened and closed again after a further interval of time.