US PATENT SUBCLASS 29 / 890.041
.~.~.~ Utilizing bond inhibiting material

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.03  DF  .~ Heat exchanger or boiler making {15}
890.039  DF  .~.~ Sheet joined to sheet {2}
890.041.~.~.~ Utilizing bond inhibiting material {1}
890.042  DF  .~.~.~.~> With subsequent fluid expansion

DEFINITION

Classification: 29/890.041

Utilizing bond inhibiting material:

(under subclass 890.039) Process wherein the heat exchanger or boiler is selectively bonded together making use of coating composition or applied substance which prevents or

minimizes bonding in particular interface areas.

(1) Note. The above method is one type of "roll bonding".