Title:
HEATER FOR THERMALLY BONDING PLASTIC FILM AND METHOD OF OPERATING HEATER
Document Type and Number:
Japanese Patent JPS5981132
Kind Code:
A
Abstract:
Heating apparatus for thermally bonding thermoplastic foil layers to produce a longitudinally welded seam. The heating apparatus comprises an elongated jaw element having a work surface for receiving the thermoplastic foils, at least two heating elements located within the jaw element and at least one temperature sensor associated with each of the heating elements. A control device is coupled to each of the heating elements and its respective temperature sensor to maintain the temperature of the jaw element at a value which will result in bonding of the foil layers. A regulating device is coupled to the control devices and to the temperature sensors for selectively operating the control devices to switch the heating elements in accordance with the temperature detected by the temperature sensor.
Inventors:
MARUCHIN REEE
Application Number:
JP15911083A
Publication Date:
May 10, 1984
Filing Date:
September 01, 1983
Export Citation:
Assignee:
SIG SCHWEIZ INDUSTRIEGES
International Classes:
B29C53/00; B29C65/00; B29C65/18; B29C65/26; G05D23/20; (IPC1-7): B29C27/06
Attorney, Agent or Firm:
Haruo Hamada