Elongate hot melt extrusion nozzle

Details Elongate hot melt extrusion nozzle Elongate hot melt extrusion nozzle

B - Operations, Transporting

05

C

32/74

B05C 5/02 (2006.01) B05C 3/12 (2006.01)

Patent

CA 1043559

ABSTRACT An apparatus and method for applying hot melt coatings to the under face of a web from the orifice of a coating head. The extrusion pressure preferably lifts the web slightly by overcoming web tension. Uniform heat is achieved by central feed to the head. Smoothing doctor blades are not requir- ed and the head is movable relative to a fixed back-up roll so that roll read- justment is not required when rethreading. One extrusion lip is flexible and independently movable relative to the other to permit change in width of the elongated extrusion orifice. A relatively light, distortable lip bearing member is provided.

207004

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