Gumming device and a method for gumming a web of wrapping...

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

Reexamination Certificate

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Details

C156S284000, C156S308600, C427S427200

Reexamination Certificate

active

07976656

ABSTRACT:
A method of gumming a web of paper material in a filter tip attachment machine is implemented using a gumming device that comprises a gumming roller and a transfer roller counter-rotating tangentially one to another about horizontal and parallel axes, and creating a trough in which to hold a prescribed quantity of adhesive supplied by a feed circuit, also a drive system by which the rollers are set in rotation on their axes, and a control unit to which both the feed circuit and the drive system are interlocked. The gumming roller revolves tangentially to the web of material at a gumming station, and the method envisages a procedure, triggered in the event of a stoppage affecting the machine, that consists in the steps of suspending delivery of the adhesive, distancing the web of paper material from the gumming roller, and reversing the direction of rotation of the rollers, relative to the direction of rotation during normal operation, in such a way that the trough is emptied gradually of adhesive.

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patent: 6258168 (2001-07-01), Pawelko et al.
patent: 6521043 (2003-02-01), Spatafora
patent: 2005/0022730 (2005-02-01), Rizzoli et al.
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patent: 0102101 (2001-01-01), None
Translation of EP 1 502 661 A2. Robert Buerkle, Feb. 2005, all pages.
European Search Report dated Nov. 3, 2009 from counterpart Italian application.

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