Lead edge feeder wheel for carton making machine

Abstract

A lead edge feeder wheel used in a carton making machine, having a tread for friction contact with a cardboard during rotation to feed the cardboard into the carton making machine cycle by cycle in conjunction with the operation of wheel grids and a vacuum system, and one or multiple grooves extending along the tread for rendering a visual indication when the tread is worn off, avoiding biasing of the cardboard during feeding.

1 . A lead edge feeder wheel used in a carton making machine, comprising a tread for friction contact with a cardboard during rotation to feed said cardboard into the carton making machine, wherein the lead edge feeder wheel further comprises at least one groove extending along said tread for rendering a visual indication when said tread is worn off. 
     
     
         2 . The lead edge feeder wheel as claimed in  claim 1 , wherein the lead edge feeder wheel further comprises an annular wheel body having an outer periphery forming said tread and an inner periphery opposing said outer periphery, a mounting hole surrounded by said annular wheel body, and a flange extending along said inner periphery of said annular wheel body and radially projecting into said mounting hole. 
     
     
         3 . The lead edge feeder wheel as claimed in  claim 2 , wherein the lead edge feeder wheel further comprises a plurality of protruding portions spaced around said inner periphery of said annular wheel body within said mounting hole and respectively perpendicularly extending across said flange, said protruding portions having a thickness greater than said flange, one said protruding portion being splitted in the middle to facilitate splitting of the lead edge feeder wheel. 
     
     
         4 . The lead edge feeder wheel as claimed in  claim 1 , wherein the lead edge feeder wheel further comprises an annular wheel body having an outer periphery forming said tread and an inner periphery opposing said outer periphery, a mounting hole surrounded by said annular wheel body, two beads respectively radially extending along two inner liners of said annular wheel body, and a plurality of protruding portions spaced around said inner periphery of said annular wheel body within said mounting hole and respectively connected between said two beads, one said protruding portion being splitted in the middle to facilitate splitting of the lead edge feeder wheel. 
     
     
         5 . The lead edge feeder wheel as claimed in  claim 1 , wherein the lead edge feeder wheel further comprises an arched wheel body having an outer periphery forming said tread and an inner periphery opposing said outer periphery and defining a semi mounting hole, and two wings respectively extended from two distal ends of said arched wheel body in direction toward each other.