Heating amount adjusting device for a preheater in a corrugated cardboard producing machine

摘要

A machine has a preheater for heating a corrugated cardboard sheet of original paper or single face type corrugated cardboard sheet in each of various processing stages for producing a corrugated cardboard by bonding a liner paper onto a corrugated central core paper. The preheater consists of a roll 17 and includes a lap (wrap) amount adjusting tool (31a, 31b, 31c, 31d) movable along the circumference of the roll (17) to adjust amount of insertion of the tool between a circumference of roll (17) and the original paper (A) or the single face type corrugated cardboard. Amount of contact or no contact between roll 17 and cardboard sheet or original paper may thereby be determined. …The tool may consist of rolls 31a-31d or a shutter blade arranged around the circumference of the roll 17. …A plurality of preheaters each operating independently of the other may be arranged. ……