Apparatus for stretching attachment devices at high speeds

Details Apparatus for stretching attachment devices at high speeds Apparatus for stretching attachment devices at high speeds

1978-08-01

1980-04-08

Lowe, James B.

Plastic article or earthenware shaping or treating: apparatus

With means to retard or stop moving element

4253241, 425383, 4254501, 425DIG5, 425DIG53, B29D 3100, B29F 100, B29C 1702

Patent

active

041970756

ABSTRACT:
An apparatus for molding and stretching at high speed an attachment device integrally composed of a synthetic resin and comprising a head, a cross-bar and a filament integrally connecting the head and the cross-bar to each other is disclosed. The apparatus is comprised of a fixed frame, two movable frame portions, four mold members, two cam rod members, and a cam shaft. The two movable frame members are movably connected to the fixed frame. The four mold members are positioned on the two movable frame members, the mold members being movable relative to one another. The two cam rod members are secured to the fixed frame, and the cam shaft member is mounted on one of the mold members. When the movable frame members are moved relative to the fixed frame, they cause the cam shaft to move along one of the cam rod members, thus causing two of the mold members to be pulled away from the remaining two mold members, thereby stretching the filament connecting portion of the attachment device. As the cam shaft is moved along the other cam rod, the two mold members are moved back towards the other two mold members, thus forceably relaxing the filament.

REFERENCES:
patent: 519127 (1894-05-01), Jones
patent: 2890488 (1959-06-01), Gemberling
patent: 2997742 (1961-08-01), Mieville
patent: 3380122 (1968-04-01), Kirk
patent: 3781402 (1973-12-01), Hanggi et al.
patent: 3797979 (1974-03-01), Greenwood

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