Glue machine automatic rider roll
AssigneeMolins Machine Company, Inc.
InventorsRobert H. Craemer, Anthony N. Scardapane
Life of this patent
Estimating the term…
Abstract
The caliper of single face corrugated paperboard is measured and a caliper signal is generated. A gap signal is generated to represent the gap between a rider roll and an applicator roll. A value is subtracted from the caliper signal or a value is added to the gap signal to represent the desired compression of the paperboard as it passes between the rider roll and the applicator roll. A comparator compares the signals after one of the signals has been modified and generates a difference signal. A motor responsive to the difference signal is provided for adjusting the rider roll so as to maintain the gap at a preselected value with respect to the caliper of the board prior to its compression.
Claims10
Apparatus for controlling the application of a liquid bonding agent to the flute tips of a web of single face corrugated paperboard at a double facer glue machine which includes a receptacle for holding a supply of the bonding agent, an applicator roll partially immersed in said supply, a rider roll for urging the web against the applicator roll as the web moves therebetween, means supporting the rider roll for movement toward and away from the applicator roll to vary the gap therebetween, and an idler roll upstream from said rider roll for guiding the web, the improvement comprising:
- (a) means associated with the idler roll for sensing, generating and transmitting a caliper signal as a function of said caliper of the web,
- (b) means associated with the rider roll for sensing, generating and transmitting a gap signal as a function of the gap between the rider roll and the applicator roll,
- (c) means for modifying one of said caliper signal and gap signal by subtracting a value from the caliper signal or adding a value to the gap signal to represent the desired compression of the web as it passes between said rider roll and said applicator roll,
- (d) a comparator for generating a difference signal signal after one of said signals has been modified, a motor responsive to said difference signal, and means controlled by said motor for adjusting said gap.
Apparatus for controlling the application of a liquid bonding agent to the flute tips of a web of single face corrugated paperboard at a double facer glue machine which includes a receptacle for holding a supply of the bonding agent, an applicator roll partially immersed in said supply, a rider roll for urging the web against the applicator roll as the web moves therebetween, means supporting the rider roll for movement toward and away from the applicator roll to vary the gap therebetween, and an idler roll upstream from said rider roll for guiding the web, the improvement comprising:
- (a) sensor means associated with the idler roll for sensing the caliper of the web and for transmitting a caliper signal,
- (b) sensor means associated with the rider roll for sensing the gap between the rider roll and the applicator roll and for transmitting a gap signal,
- (c) means for modifying one of said caliper signal and gap signal by subtracting a value from the caliper signal or adding a value to the gap signal to represent the desired compression of the web as it passes between said rider roll and applicator roll, and
- (d) means for exhibiting and comparing said signals after one of said signals has been modified and for automatically generating a difference signal, a servomotor responsive to said difference signal, and means controlled by said servomotor for moving said rider roll for maintaining said gap below the caliper of the web to thereby partially crush the web as it passes through said gap.
A method of controlling the application of a bonding agent to flute tips of a web of single face corrugated paperboard in a glue machine as the web passes through a gap between the peripheries of a rider roll and an applicator roll comprising the steps of:
- (a) sensing the caliper of the web upstream from said glue machine and generating and transmitting a caliper signal as a function of said caliper of the web,
- (b) sensing the gap and generating and transmitting a gap signal as a function of said gap,
- (c) modifying one of said signals by an amount corresponding to a desired compression of the web as it passes through said gap, comparing said signals after one of said signals has been thusly modified, generating a difference signal, and
- (d) adjusting said gap in response to said difference signal.
Dependencies are inferred from the claim text.