US PATENT SUBCLASS 53 / 371.2
.~.~.~ Having nonplanar sealing surface

Current as of: June, 1999
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53 /   HD   PACKAGE MAKING

285  DF  CLOSING PACKAGES AND FILLED RECEPTACLES {7}
370.2  DF  .~ Including provision for pleat of cover overhang {7}
370.7  DF  .~.~ With means to heat or cool seam {5}
371.2.~.~.~ Having nonplanar sealing surface

DEFINITION

Classification: 53/371.2

Having nonplanar sealing surface:

(under subclass 370.7) Apparatus wherein the means to supply or remove thermal energy has a surface that is other than flat along the full length of the seam.