Mitsubishi Jukogyo Kabushiki Kaisha

Yoshimitsu Tsutsui

Toshio Miki

Akira Yoshida

Ryoji Mouri

Tatsushi Seko

Susumu Tsuyuki

Noboru Kusafuka

Koji Kato

Hisao Kishigami

Nobuhiko Kogo

An auto-threading apparatus is disclosed. In a film processing line incorporating a transferring/receiving mechanism having a take-up unit, two pairs of cutters are moved by twos in crosswise directions of a film to cut away side narrow portions of the film by one pair of cutters. Chain clips catch the film ends to longitudinally divide the film into three parts by the other pair of cutters. The side portions of the 3-divided film are cut away by rotary cutters. The left central portion thereof is cut away by moving the other pair of cutters toward the center. The film is transferred to and received by the chain clips.

Auto-threading apparatus

In a film processing line incorporating a transferring/receiving mechanism having a take-up unit, two pairs of cutters are movable in crosswise directions of a film, and narrow portions of the film at sides thereof are cut away by one pair of cutters. Chain clips catch the sides of the film and the other pair of cutters longitudinally divide the film into three parts. The side parts of the divided film are cut away by rotary cutters. The central part thereof is cut away by moving the other pair of cutters toward the center of the film. A portion of the film is thus transferred to and received by the chain clips.

Auto-threading method

A method for controlling the thickness of an extruded, biaxially elongated film product, in which thickness deviations are controlled automatically and without supervision. In the method, correlation between positions along the widthwise direction of a film sheet and positions of die manipulation bolts of an extrusion die is obtained, and initially, a profile of the film sheet prior to lateral elongation is converged into a tolerable range; thereafter, the thickness of the film sheet after lateral elongation is measured, and if there are thickness deviations outside the tolerable range, a thickness regulation is effected by transmitting a signal corresponding to the thickness deviations to the appropriate die manipulation bolts.

Method for controlling the thickness of a film product

Growing community of inventors

Nagoya, Japan

Yoshimitsu Tsutsui