Patent ID: 8678715
Filing Date: 2014-03-25
Classification: B26D,B29D,Y10T

Abstract:
1. Apparatus for use in retreading tires, comprising: a hub having first and second side plates adapted for rotation about an axis; plural mounting pins equally angularly spaced about said axis of rotation, each mounting pin having first and second opposed ends, wherein the first end of each mounting pin is attached to said first side plate and the second end of each mounting pin is attached to said second side plate: plural stacks of rasp blades removably attached to said mounting pins, said stacks extending end-to-end about said hub; and plural spacers disposed in each of said plural stacks of rasp blades, wherein each of said spacers is disposed between and engages an adjacent pair of rasp blades for maintaining each of said rasp blades in fixed, rigid position in said hub, wherein each of said spacers is attached to one or more of said mounting pins for maintaining said spacers in fixed position between said first and second side plates, and wherein each spacer includes plural lateral recesses each forming a respective opening with an adjacent rasp blade to allow for unrestricted flow of air between each spacer and an adjacent rasp blade for removing heat from the rasp blades during operation, with each spacer including a generally flat body having a peripheral flange disposed on its outer edge and extending outwardly from said outer edge in a direction generally transverse to said flat body, said peripheral flange including alternating spaced projections engaging adjacent rasp blades and recesses allowing for air flow between adjacent rasp blades and spacers.