Method for applying reclosable fastener to package
AssigneeMultivac, Inc.
InventorPeter C. Cipolla
Life of this patent
Estimating the term…
Abstract
An apparatus and method for forming reclosable packages for food and other items. The package is formed from webs of thermoplastic material and include a separable fastener strip which is reclosable to permit reclosing of the package. Forming, filling, sealing and cutting stations are included for forming the package. A heater heats the fastener strip while it is under tension prior to application to the webs to straighten the fastener strip for improved alignment and sealing.
Claims10
A method for forming a reclosable package having confronting walls, said method comprising the steps of:
- providing a web of sheet material from a supply source;
- providing an extended length of separable fastener strip from a supply source;
- forming said confronting walls of said reclosable package from said web of sheet material;
- directing said fastener strip along a linear path of travel toward said confronting walls;
- tensioning said fastener strip in a linear direction along said path;
- heating said fastener strip across its entire cross sectional dimension while said tensioning step occurs and before said fastener strip reaches said confronting walls;
- continuing advancement of said fastener strip in a linear direction;
- then introducing said fastener strip between the confronting walls;
- sealing said fastener strip to the confronting walls;
- and
- sealing together the confronting walls to form said reclosable package.
A method for forming a reclosable package comprising the steps of:
- providing a first web of sheet material from a supply source;
- providing a length of separable fastener strip from a supply source;
- providing a second web of sheet material from a supply source;
- placing a product on said first web of sheet material;
- directing said fastener strip along a linear path of travel toward said confronting walls;
- tensioning said fastener strip in a linear direction along said path;
- heating said fastener strip across its entire cross sectional dimension while said tensioning step occurs and before said fastener strip reaches said confronting walls;
- continuing advancement of said fastener strip in a linear direction;
- then introducing said fastener strip between the confronting walls;
- sealing said fastener strip to the confronting walls;
- and
- sealing together the confronting walls to form said reclosable package.
A method for forming a reclosable package comprising the steps of:
- providing a first web of sheet material from a supply source;
- providing an extended length of separable fastener strip from a supply source;
- providing a second web of sheet material from a supply source;
- directing said fastener strip along a linear path of travel toward said confronting walls;
- tensioning said fastener strip in a linear direction along said path;
- heating said fastener strip across its entire cross sectional dimension while said tensioning step occurs and before said fastener strip reaches said confronting walls;
- continuing advancement of said fastener strip in a linear direction;
- then introducing said fastener strip between said first and second webs with said second web covering the first web;
- sealing said fastener strip to said first web and said second web;
- and
- sealing together the first web and the second web to form said reclosable package.
Dependencies are inferred from the claim text.