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Title:
CONTINUOUS SEALING METHOD AND APPARATUS FOR SEALED PACKAGE FORMED WITH LAMINATE FILM
Document Type and Number:
Japanese Patent JPH01308703
Kind Code:
A
Abstract:

PURPOSE: To form a longitudinal raised line on a flat seal part in order to permit the visual check on changes in the seal pressure, by providing seal rolls for effecting an longitudinal seal with a surface for forming a lattice-shaped depressed and raised seal and a flat seal forming surface, both in a predetermined width, and by providing a groove for forming a raised line on the flat seal forming surface.

CONSTITUTION: A heat seal part 5a of each of a pair of longitudinal seal rolls 5 adapted for forming a longitudinal seal part 6 has a seal forming surface 14 provided with lattice-shaped depressed and raised portion for forming lattice- shaped seal 6a and a flat seal forming surface 15 for forming a flat seal 6b. The flat seal forming surface 15 is provided with a groove 16 for forming a raised line 6c. A folded film sheet 1 is heated at both sides thereof by the longitudinal seal rolls 5, whereby the interior low temperature fusible films 2 are gradually fused together and the superfluous film is forced out of the sealed area and forced into the raised line 6c formed on the exterior low temperature non-fusible film 3 by the groove 16.


Inventors:
KOMATSU TERUYOSHI
Application Number:
JP13154188A
Publication Date:
December 13, 1989
Filing Date:
May 31, 1988
Export Citation:
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Assignee:
KOMATSU MFG CO LTD
International Classes:
B65B51/10; B29C65/18; B65B9/06; (IPC1-7): B65B9/06; B65B51/10
Domestic Patent References:
JPS617149U1986-01-17
JPS6254663A1987-03-10
JPS39577Y1
JPS5332869U1978-03-22
Attorney, Agent or Firm:
Sadao Ito