Ultrasound unit for sealing lengths of filter paper

Details Ultrasound unit for sealing lengths of filter paper Ultrasound unit for sealing lengths of filter paper

2008-05-13

2008-05-13

Sells, James (Department: 1791)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S073100, C053S134200

Reexamination Certificate

active

10546195

ABSTRACT:
A unit for sealing filter bags for products for infusion comprises at least: a shaped revolving roller (2) with circumferential and radial tracks (3, 4) that act as guides to make longitudinal and transversal contact seals on a web (5) of filter paper folded onto itself and moving under the roller (2), using sealing sonotrode means (6) arranged in sealing position under the roller (2) and close to the moving web (5) in such a way as to form) a tubular web of filter paper with a succession of substantially flattened filter bags formed on it; the sealing sonotrode means (6) being operated upon by fluid-driven means (7) designed to control, through appropriate means (8), the variable constituted) by the contact force and/or the distance between the sealing means (6) and the roller (2).

REFERENCES:
patent: 4631685 (1986-12-01), Peter
patent: 5934043 (1999-08-01), Aindow et al.
patent: 6592711 (2003-07-01), Kubik
patent: 2002/0005027 (2002-01-01), Lohrey et al.
patent: 195 36 881 (1997-06-01), None
patent: 2004-123150 (2004-04-01), None

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