Method for closing an end of a thermoplastic tube using ultrason

Details Method for closing an end of a thermoplastic tube using ultrason Method for closing an end of a thermoplastic tube using ultrason

1980-12-05

1982-09-21

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

74 1SS, 310325, B29C 1700

Patent

active

043506496

ABSTRACT:
A method for closing an open end of a thermoplastic tube by applying ultrasonic energy to the end in a direction normal to the longitudinal axis of the tube. A horn adapted to undergo ultrasonic vibrations is provided and includes an open cavity disposed substantially at an antinodal region of longitudinal motion of the horn and oriented normal to the direction of longitudinal motion of the horn. The horn is rendered resonant along its longitudinal axis while the open end concomitantly is urged into the cavity in a direction normal to the direction of longitudinal motion of the horn thereby forming the end to the shape of the cavity.

REFERENCES:
patent: 3499808 (1970-03-01), Obeda
patent: 3524085 (1970-08-01), Shoh
patent: 3790059 (1974-02-01), Jacke et al.
patent: 3824138 (1974-07-01), Karobath et al.
patent: 3972758 (1976-08-01), Bieber

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