Patent ID: 9120285
Filing Date: 2015-09-01
Classification: B31B,B65H

Abstract:
1. A sheet feeder of a corrugated paperboard box making machine, said sheet feeder including: a sheet feed table, feed rolls, a backing roller, and a main unit, said feed rolls being placed in said main unit in upper and lower opposite positions to feed downstream a corrugated paperboard sheet fed one by one from corrugated paperboard sheets stacked on said sheet feed table, and said sheet feeder further including an adjusting mechanism configured to adjust a gap between said feed rolls according to differences in thickness and flute shape of said corrugated paperboard sheet to be fed, wherein said adjusting mechanism includes support plates configured to pivotally support both ends of a first feed roll opposed to a second feed roll having an axis fixed to said main unit, said support plates being configured to allow an axis of said first feed roll to move with respect to said main unit, and said support plates support a first backing roller via a connecting member connecting said support plates so that said first backing roller contacts with an outer peripheral surface of said first feed roll.