US PATENT SUBCLASS 156 / 156
.~.~ With fluid pressure to prevent collapse of hollow structure during assembly and/or joining

Current as of: June, 1999
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156 /   HD   ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE

1  DF  METHODS {7}
60  DF  .~ Surface bonding and/or assembly therefor {93}
156.~.~ With fluid pressure to prevent collapse of hollow structure during assembly and/or joining

DEFINITION

Classification: 156/156

(under subclass 60) Processes combined with the step of filling the space of a hollow lamina or of the space between spaced lamina with a temporary gaseous or liquid material which exerts an opposing force during assembly and/or joining to prevent a change in the configuration or shape of one of the lamina or of the assembled laminae.

SEE OR SEARCH CLASS

72, Metal Deforming,

54, for cores filled with fillers, such as sand, liquid, etc., which are put into the tubes to support the walls during the bending operation.