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:
Jan. 16, 1990
Filed:
Nov. 29, 1988
David S Hemus, Cirencester, GB;
MB Group plc, Reading, GB;
Abstract
A method and apparatus for sealing cartons by sticking together facing surfaces of a hinged flap and a wall of each carton by means of a solvent-based, preferably water-based, adhesive, in which the cartons are continuously moved along a line past an adhesive applicator which applies a deposit of adhesive to the under surface of the flap, first pressure rollers arranged to bring the flap surface temporarily into contact with the side wall to transfer some of the adhesive to it and to thin out and spread the adhesive on the flap, a hot air nozzle which enters within the acute angle formed between the two surfaces when the flap is released from the first pressure rollers and which directs hot air onto the surfaces to effect partial drying of the adhesive, and a second set of pressure rollers to press the flap against the side wall to effect final sealing.