Form-fill-seal machine
First Claim
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1. Form-fill-seal machine comprising:
- means for moving a web of packaging material through the machine according to a process path from a web supply side, said process path being located in a process plane, said web having longitudinal marks thereon;
means for transforming the web into filled bags having a bag length; and
controlling means having first means for noticing said longitudinal marks on the web and for measuring the web position,wherein said controlling means are provided with means for storing data concerning the bag length,wherein the machine is provided with an end or turn roll for the web, said end or turn roll is arranged on the machine to be movable in said process plane and is adjustable in position in said process plane by movement means,the controlling means being adapted for controlling the movement means of the end roll for altering the length the web has to travel from the web supply side to the transforming means, in response to the bag length data stored in the controlling means and the data from the first means for noticing longitudinal marks on the web and the measuring of the web position.
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Abstract
Form-fill-seal machine includes parts for moving a web of packaging material through the machine according to a process path and parts for transforming the web into filled bags, as well as a zipper strip applicator device for supplying a zipper strip for each bag transverse to the process path, by use of a first and a second conveyor, which in the supply direction of the zipper strip are placed one behind the other and are both provided with parts for retaining the zipper strip during supply, a blade being placed between the first and the second conveyor for cutting the zipper strip and the first and the second conveyor being provided with their own first and second drive.
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Citations
19 Claims
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1. Form-fill-seal machine comprising:
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means for moving a web of packaging material through the machine according to a process path from a web supply side, said process path being located in a process plane, said web having longitudinal marks thereon; means for transforming the web into filled bags having a bag length; and controlling means having first means for noticing said longitudinal marks on the web and for measuring the web position, wherein said controlling means are provided with means for storing data concerning the bag length, wherein the machine is provided with an end or turn roll for the web, said end or turn roll is arranged on the machine to be movable in said process plane and is adjustable in position in said process plane by movement means, the controlling means being adapted for controlling the movement means of the end roll for altering the length the web has to travel from the web supply side to the transforming means, in response to the bag length data stored in the controlling means and the data from the first means for noticing longitudinal marks on the web and the measuring of the web position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Form-fill-seal machine comprising:
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means for moving a web of packaging material through the machine according to a process path from a web supply side; means for transforming the web into filled bags; a zipper strip applicator device having means for supplying a zipper strip for each bag transverse to the process path and having means for sealing or pre-sealing a zipper strip to the web for each bag to be made, the machine being adapted for making the bags with continuous web supply at the transforming means; means for keeping the web still at the location of the (pre-) sealing means; and means placed downstream of the (pre-) sealing means for forming a buffer web length prior to each keeping the web still and releasing said means for forming a buffer web length during keeping the web still, wherein the means for keeping the web still are positioned upstream of the buffer forming means and comprise a web brake. - View Dependent Claims (14, 15, 16, 17, 18)
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19. Form-fill-seal machine comprising:
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means for moving a web of packaging material through the machine according to a process path from a web supply side; means for transforming the web into filled bags; and control means having first means for noticing longitudinal marks on the web and for measuring the web position, the control means being provided with means for storage of data regarding the bag length, the machine being provided with an end or turn roll for the web, said end or turn roll is movably arranged on the machine in web direction and is adjustable in position in web direction by means of movement means, the control means being adapted for controlling the movement means of the end roll for altering the length the web has to travel from the supply side to the transforming means, in response to the data from the bag length input and the first means for noticing longitudinal marks on the web and measuring the web position.
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Specification