Patent ID: 11872744
Assignee: BLOCKWISE ENGINEERING LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC B  A | IPC B

Claim 0:
1. A parison tube former comprising:
a) a first tube retainer;
b) a second tube retainer;
c) a radial compression heater comprising:
i) a plurality of compression dies each having a working surface,

wherein the plurality of compression dies are arranged radially with respect to each other to form a central cavity defined by said working surfaces, wherein the central cavity has a central cavity diameter;
ii) a heater configured to heat the compression dies;
iii) a die actuator configured to move the plurality of compression inward to reduce the central cavity diameter;

d) a preform tube extending through the central cavity of the radial compression heater and having a length between the first tube retainer and the second tube retainer;
wherein the radial compression heater is configured to heat a portion of the length the preform tube between the first tube retainer and the second tube retainer,
wherein the plurality of compression dies are configured to close down onto the outer surface of the preform tube, wherein the working surface of said plurality of compression dies contact the preform tube to heat a portion of said length of the preform tube; and
wherein the first tube retainer and second tube retainer are configured to move apart from each other to stretch the preform tube and from said parison tube having a balloon portion configured between a first stretched portion and a second stretched portion.