The Goodyear & Tire Rubber Company

Donald W Ward

Bernard Byron Jacobs

Bryan E Nixon

Joseph Edward Lipovac

Ronald J Zaucha

Ralph A Meglen

James M Dahl

John W Kline

An apparatus and method wherein strips of elastomeric material are fed separately onto a roller at more than one position around the circumference of the roller at predetermined axial locations to form predetermined cross-sectional areas of the cross section of the band. Between the positions where the strips are applied and prior to removing the band from the roller, guide means is provided to guide the strips in the predetermined axial locations. The guide means confines the strips between a circumferentially grooved guide member and the cylindrical surface and the grooved guide member may be a replaceable insert mounted in a recess of a plate for accommodating different sizes and shapes of the formed band with different inserts.

Apparatus and method for forming a co-extrusion from extruded strips

An apparatus (10) wherein extruded strips (98,116) of elastomeric material are fed separately over a cylindrical roller surface (20) at more than one angular position (126,128,130) relative to the roller (18) by a die head (12) to form predetermined cross-sectional areas of the co-extrusion (118). The channels (26,28,36,38) in the die head guide plate (32) connecting the extruders (14,16) and the orifices (30,40) at the roller surface (20) are provided by walls of a replaceable preformer insert (44) which are spaced from the walls of an opening (42) in the guide plate (32). Different sizes and configurations of the channels (26,28,36,38) can be obtained using different preformer inserts (44). The grooves (80,88,90,114,132,134,138,151,152,154) which guide the strips (98,116) of elastomeric material applied to the roller surface (20) are in replaceable finish dies (66,68) mounted in a slot (70) in the cylindrical surface (22) of the die head (12) so that the various laminations and configurations required can be obtained by inserting the desired finish dies (66,68). Different finish dies (66,68) have grooves (80,88,90,114,132,134,138,151,152,154) at different positions to provide the desired overlapping of the applied strips (98,116).

Apparatus for forming a co-extrusion from extruded strips

A mold for forming elastomeric articles and the like, has vent plugs inserted in bores through the body of the mold. The vent plugs may be manufactured of sintered metal. Each vent plug has a bore therethrough that is significantly smaller than the bore through the mold body, so that very little, if any, of the elastomeric substance being formed in the mold flows into the bore of the vent plug.

Mold and vent plug therefor

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Silver Lake, OH, United States of America

Donald W Ward