Tube rolling device
First Claim
1. A method of forming filter tubes comprising:
- delivering a filter element to a flute on a first drum, the flute having a vacuum for securing the filter element thereto;
axially engaging opposite ends of the filter element with first and second tube forming rollers;
delivering a continuous web with a glue pattern thereon to a second drum;
cutting the web into discrete pieces;
delivering at least a portion of the web piece to at least a portion of the filter element in the flute of the first drum;
rolling the web piece around the filter element and the tube forming rollers to form a cylindrically shaped structure; and
axially disengaging the tube forming rollers to produce a filter tube with hollow ends and a centrally positioned filter element.
1 Assignment
0 Petitions
Accused Products
Abstract
Method and apparatus for forming filter tubes comprises delivering a filter element to a flute on a first drum having vacuum for securing the filter element thereto. First and second tube forming rollers axially engage opposite ends of the filter element. A second drum accepts and cuts a continuous paper web with a glue pattern thereon into paper pieces, and a cut paper piece is delivered to the filter element. The paper piece is then rolled around the filter element and the tube forming rollers to form a cylindrical shape. The tube forming rollers are axially disengaged to thereby produce a filter tube with hollow ends and a control positioned filter element.
19 Citations
19 Claims
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1. A method of forming filter tubes comprising:
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delivering a filter element to a flute on a first drum, the flute having a vacuum for securing the filter element thereto; axially engaging opposite ends of the filter element with first and second tube forming rollers; delivering a continuous web with a glue pattern thereon to a second drum; cutting the web into discrete pieces; delivering at least a portion of the web piece to at least a portion of the filter element in the flute of the first drum; rolling the web piece around the filter element and the tube forming rollers to form a cylindrically shaped structure; and axially disengaging the tube forming rollers to produce a filter tube with hollow ends and a centrally positioned filter element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for rolling filter tubes comprising:
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a flute on a first drum for accepting a filter element, the flute having a vacuum for securing the filter element thereto; first and second tube forming rollers for axially engaging opposite ends of the filter element; a second drum for accepting and cutting a continuous web with a glue pattern into pieces and delivering a cut web piece to the filter element; and a belt for contacting the web piece to roll the paper piece around the filter element. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification