Machine and method for making filter bags for infusion products

Details Machine and method for making filter bags for infusion products Machine and method for making filter bags for infusion products

2008-07-29

2008-07-29

Harmon, Christopher (Department: 3721)

Manufacturing container or tube from paper; or other manufacturi

Assembling or disassembling of distinct members

Of tag or label to tether or to article

C493S198000, C493S209000, C493S221000, C493S226000, C493S941000, C493S961000, C053S134200, C053S413000

Reexamination Certificate

active

07404789

ABSTRACT:
A machine (1) for making filter bags (4) of tetrahedral shape for infusion products comprises a revolving conveyor drum (15) driven by a first drive shaft (16) to feed a web (5) of filter paper along a path (P) on which there are positioned: a station (25) for feeding the filter paper web (5); a station (21) for feeding a succession of tags (6); a station (22) for feeding tie string (7) connecting the filter bags (4) to the respective tags (6); a station (23) for arranging the tie string (7) according to a defined pattern on the path (P); and a plurality of sealers (24) facing the path (P) to attach the tie string (7) and the tags (6) to the filter paper web (5). The sealers (24) perform a defined movement between a sealing position and a waiting position, and this movement, which is performed simultaneously and synchronously by all the sealers (24), is imparted, through a transmission element (39) shared by all the sealers (24), by a second cam drive shaft (36) connected to the same source of motion (18) to which the first shaft (16) that drives the conveyor drum (15) is connected.

REFERENCES:
patent: 4288224 (1981-09-01), Romagnoli
patent: 5632132 (1997-05-01), Kuipers et al.
patent: 5689936 (1997-11-01), Kenney
patent: 5979144 (1999-11-01), Bailey et al.
patent: 6511410 (2003-01-01), Ketel et al.
patent: 10-157710 (1998-06-01), None
patent: WO 95/10462 (1995-04-01), None
patent: WO 01/05662 (2001-01-01), None
patent: WO 02/40263 (2002-05-01), None

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