METHOD AND APPARATUS FOR PACKAGING ARTICLES BY MEANS OF AN ENVELOPE MADE OF A THERMOPLASTIC FILM

Title:

METHOD AND APPARATUS FOR PACKAGING ARTICLES BY MEANS OF AN ENVELOPE MADE OF A THERMOPLASTIC FILM

Document Type and Number:

WIPO Patent Application WO2000076848

Kind Code:

A3

Abstract:

The method allows, in a completely automatic way, to form the enveloppes of size of the article without leaving space between the welding line and the article. A folded web (30) of continuous film is longitudinally welded. Thermoplastic cutting and welding means are provided (52) transversal to the web. After opening apart from each other the wings opposite to the continuous longitudinal closed edge (33), an article (10) is transversally inserted between the thermoplastic cutting/welding means (52) and the front closed end (38). Then, at the level of the thermoplastic cutting/welding means (52), there is the transversal pinching (53) of the folded web by means of a transversal gripper (53), leaving the web (30) free of sliding through the gripper. Then, there is the pulling of the web upstream of (45) the transversal gripper and the drawing back of the web that slides through the gripper until a front edge of the article contacts the front closed end. Then, there is a further drawing back step of the web until a rear edge of the article contacts the transversal gripper, followed by the transversal cutting and welding of the web.

Inventors:

MANINI LUCA (IT)

Application Number:

PCT/EP2000/004659

Publication Date:

May 31, 2001

Filing Date:

May 22, 2000

Export Citation:

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Assignee:

S R A S R L (IT)
MANINI LUCA (IT)

International Classes:

B65B9/093; B65B59/02; (IPC1-7): B65B9/08; B65B59/02

Foreign References:

DE4315284A1	1994-11-10
US4205504A	1980-06-03
US4548018A	1985-10-22

Other References: