Mitsubishi Jukogyo Kabushiki Kaisha

Yukio Oku

Yukuharu Seki

Tadashi Hirakawa

Toshiaki Kusubayashi

Tadeshi Hirakawa

Tochiaki Kusubayashi

Slitter scorer including a head exchanging device

Apparatus for determining positions of heads

A rotary plate-shape material cutting apparatus is disclosed. The apparatus comprises a pair of hollow knife cylinders, each provided with a knife on the circumferential surface and adapted to rotate in mutually opposite directions, shafts piercing the hollow portion of the knife cylinders and having both ends thereof supported by frames, bearings positioned at both ends of the knife cylinders and interposed between the shafts and knife cylinders and at least one roll provided at each of the knife cylinders, rotatably supported therein and having its rotary surface kept in contact with the external circumference of the shafts.

Rotary plate-shape material cutting arrangement

A method and apparatus for minimizing or eliminating warp in corrugated board by imparting different curvature on alternate successive lengths of the board being manufactured prior to its being stacked. The corrugated board, as it moves through the manufacturing apparatus, is subjected to treatment on its upper surfaces at different intervals that the lower surfaces to impart various curvatures to the sections being cut and stacked. As the cut corrugated board sections are accumulated in the stack alternate groups of board sections have opposite curvature throughout the height of the stack. The stacked sections are maintained in this disposition a time sufficient for the weight of the stack to render the formed sheets substantially flat.

Method and apparatus for preventing warp in corrugated cardboard

Growing community of inventors

Mihara, Japan

Yukio Oku