Patent ID: 9522798
Filing Date: 2016-12-20
CPC Classification: B65H,Y10T

Claim Text:
1. A method of retrofitting a corrugated paperboard box converting machine including a main gear train for driving a rotatable major repeat cylinder having a fixed repeat length and rotating at a surface velocity, and also comprising a feed roll nip between an upper feed roll and a lower feed roll for driving a sheet to the repeat cylinder, a variable speed sheet feeder adapted for feeding said sheet to said feed roll nip, and a feed gate, wherein the sheet is crushed by the feed roll nip as the sheet is transported to the repeat cylinder, the steps comprising: a. removing the variable speed sheet feeder; b. removing the upper feed roll; c. removing the lower feed roll; d. inserting a drive shaft which replaces the lower feed roll for driving the main gear train of the box converting machine; e. inserting a constant speed vacuum transport section for transporting sheets to the repeat cylinder, said constant speed vacuum transport section adapted to be driven by said drive shaft; f. inserting a variable speed sheet feeder section adapted to operate with said constant speed vacuum transport section; and g. inserting the feed gate; wherein the sheet is transported uncrushed by said constant speed vacuum transport section as the sheet is driven to the repeat cylinder.