METHOD FOR MAKING POUCHES
First Claim
1. A method for making pouches comprising:
- providing a continuous web;
folding the web to provide confronting side surfaces joined along a bottom edge;
forming a vertical seal between the confronting side surfaces, thereby providing a series of adjacent pockets having opposite side walls with each pocket having an unsealed opening along a top edge;
filling the pockets through the unsealed opening with material; and
sealing the unsealed opening, wherein the web is perforated by a perforation between a leading length piece of the web adapted to form a leading pocket and a trailing length piece of the web adapted to form a trailing pocket,wherein the continuous web is abutted against an outer circumference of a rotating filler wheel to follow a circular path and wherein a distance between a trailing edge of the leading length piece and a leading edge of a trailing length piece is increased for tearing the leading and the trailing lengths pieces apart at the perforation while the length pieces are moved on the circular path.
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Accused Products
Abstract
The present invention relates to a method for making pouches providing a continuous web; folding the web to provide confronting side surfaces joined along a bottom edge; forming a vertical seal between the confronting side surfaces, thereby providing a series of adjacent pockets having opposite side walls with each pocket having an unsealed opening along a top edge; filling the pockets through the unsealed opening with material; sealing the unsealed opening. In the inventive method, which facilitates handling of the continuous web forming the pouches, the web is perforated by a perforation between a leading length piece of the web adapted to form a leading pocket and a trailing length piece of the web adapted to form a trailing pocket, and the distance between a trailing edge of the leading length piece and a leading edge of a trailing length piece is increased for tearing the leading and the trailing lengths pieces apart at the perforation.
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Citations
14 Claims
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1. A method for making pouches comprising:
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providing a continuous web; folding the web to provide confronting side surfaces joined along a bottom edge; forming a vertical seal between the confronting side surfaces, thereby providing a series of adjacent pockets having opposite side walls with each pocket having an unsealed opening along a top edge; filling the pockets through the unsealed opening with material; and sealing the unsealed opening, wherein the web is perforated by a perforation between a leading length piece of the web adapted to form a leading pocket and a trailing length piece of the web adapted to form a trailing pocket, wherein the continuous web is abutted against an outer circumference of a rotating filler wheel to follow a circular path and wherein a distance between a trailing edge of the leading length piece and a leading edge of a trailing length piece is increased for tearing the leading and the trailing lengths pieces apart at the perforation while the length pieces are moved on the circular path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for making pouches comprising:
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providing a continuous web; folding the web to provide confronting side surfaces joined along a bottom edge; forming a vertical seal between the confronting side surfaces, thereby providing a series of adjacent pockets having opposite side walls with each pocket having an unsealed opening along a top edge; filling the pockets through the unsealed opening with material; and sealing the unsealed opening, wherein a longitudinal opening guide means is introduced between the confronting side surfaces and through the unsealed opening as the continuous web is abutted against the outer circumference of a rotating filler and that the confronting side surfaces are separated from each other by the longitudinal opening guide means until a spout of a spout wheel has been introduced into the pocket. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification