Cutting and heat sealing die assembly
AssigneeFloat Machines Inc.
InventorBradley H. Buchanan
Life of this patent
Estimating the term…
Abstract
An apparatus for cutting and heat sealing a pair of overlying heat-sealable panels together comprises a conveyer for moving a pair of superimposed webs of panel material along a linear path and into a cutting and sealing station. A combined cutting and sealing die assembly includes a cutting die for cutting the panels out of the webs and a sealing die for sealing peripheral edges of the superimposed panels together. A heater element is mounted on each of the dies to heat them to their respective cutting and sealing temperatures with the dies being thermally insulated to prevent heat transfer therebetween. A plurality of spring clips attach the dies together to permit thermal expansion of the cutting die relative to the sealing die.
Claims19
In an apparatus for forming an article out of a pair of superimposed heat-sealable panels comprising
- conveyor means for moving a pair of superimposed webs along a path, and
- a cutting and sealing station positioned adjacent to said path for receiving said webs, said cutting and sealing station comprising
- cutting means, including a cutting die, for simultaneously cutting said webs at a predetermined cutting temperature to form said panels,
- sealing means, including a sealing die, for sealing said panels together at a predetermined sealing temperature, less than said cutting temperature,
- retaining means for attaching said cutting means to said sealing means and for permitting thermal expansion and movement of said cutting die, relative to said sealing die, and
- first insulation means for mounting said cutting die on said sealing die and for thermally insulating said cutting die from said sealing die.
The apparatus of 1 wherein said retaining means comprises a plurality of spaced and tensioned spring clips.
In an apparatus for forming an article out of a pair of superimposed heat-sealable panels comprising
- conveyor means for moving a pair of superimposed webs along a path, and
- a cutting and sealing station positioned adjacent to said path for receiving said webs, said cutting and sealing station comprising
- cutting means, including a cutting die, for simultaneously cutting said webs at a predetermined cutting temperature to form said panels,
- sealing means, including a sealing die, for sealing said panels together at a predetermined sealing temperature, less than said cutting temperature, and
- retaining means for attaching said cutting means to said sealing means and for permitting thermal expansion and movement of said cutting die, relative to said sealing die, said retaining means comprising a plurality of spaced and tensioned spring clips.
A combined cutting and sealing die assembly comprising
- a heat conductive cutting die terminating at its distal end at a cutting edge,
- first heater means mounted on said cutting die for heating said cutting edge to a predetermined cutting temperature,
- a heat conductive sealing die terminating at its distal end at a sealing tip disposed adjacent to and laterally spaced inwardly from said cutting edge,
- second heater means mounted on said sealing die for heating said sealing tip to a predetermined sealing temperature,
- insulation means for thermally insulating said cutting and sealing dies from each other, and
- retaining means for attaching said cutting and sealing dies together and for permitting thermal expansion and movement of said cutting die, relative to said sealing die, said retaining means comprising tensioned spring means for resiliently clamping said cutting and sealing dies together and for biasing said cutting and sealing dies toward each other.
A combined cutting and sealing die assembly comprising
- a heat conductive cutting die terminating at its distal end at a cutting edge,
- first heater means mounted on said cutting die for heating said cutting edge to a predetermined cutting temperature,
- a heat conductive sealing die terminating at its distal end at a sealing tip disposed adjacent to and laterally spaced inwardly from said cutting edge,
- second heater means mounted on said sealing die for heating said sealing tip to a predetermined sealing temperature,
- insulation means for mounting said cutting die on said sealing die and for thermally insulating said cutting and sealing dies from each other, and
- retaining means for attaching said cutting and sealing dies together and for permitting thermal expansion and movement of said cutting die, relative to said sealing die.
In an apparatus for forming an article out of a pair of superimposed heat-sealable panels comprising
- conveyor means for moving a pair of superimposed webs along a path, and
- a cutting and sealing station positioned adjacent to said path for receiving said webs, said cutting and sealing station comprising
- cutting means, including a cutting die, for simultaneously cutting said webs at a predetermined cutting temperature to form said panels, said cutting means further comprising heater means solely mounted on said cutting die for heating said cutting die to said cutting temperature and wherein said cutting die comprises a cutting edge formed on a distal end thereof and means defining a groove adjacent to said cutting edge, said heater means comprising a heater element fixedly mounted in said groove,
- sealing means, including a sealing die, for sealing said panels together at a predetermined sealing temperature, less than said cutting temperature, and
- retaining means for attaching said cutting means to said sealing means and for permitting thermal expansion and movement of said cutting die, relative to said sealing die.
In an apparatus for forming an article out of a pair of superimposed heat-sealable panels comprising
- conveyor means for moving a pair of superimposed webs along a path, and
- a cutting and sealing station positioned adjacent to said path for receiving said webs, said cutting and sealing station comprising
- cutting means, including a cutting die, for simultaneously cutting said webs at a predetermined cutting temperature to form said panels,
- sealing means, including a sealing die, for sealing said panels together at a predetermined sealing temperature, less than said cutting temperature, said sealing means further comprising means defining a groove in said sealing die and a heater element mounted in said groove, and
- retaining means for attaching said cutting means to said sealing means and for permitting thermal expansion and movement of said cutting die, relative to said sealing die.
Dependencies are inferred from the claim text.