Glue application unit for perfect binding machine

Patent metadata

Field	Value
Publication number	US-9315065-B2
Application number	US-201114345190-A
Country	US
Kind code	B2
Filing date	Sep 16, 2011
Priority date	Sep 16, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

The gluing unit is provided with: a glue tank ( 2 ); a glue applicator roller ( 3 ) that applies the glue on the back (r) of a text block (P); a motor ( 4 ) that rotates the glue applicator roller; a wiper ( 6 ) that adjusts the amount of glue adhering to the glue applicator roller; a wiper drive mechanism that brings the wiper closer to or away from the glue applicator roller; and a control unit ( 10 ) that controls the wiper drive mechanism.

First claim

The invention claimed is:

1. A perfect binding machine comprising a clamp unit and a glue application unit which is arranged under a path of a clamp unit so as to apply glue to a back face of a book block while the clamp unit passes through the glue application unit, the back face protruding downwardly from the clamp unit, the glue application unit comprising:
a frame;
a glue tank attached to the frame and filled with glue;
a glue application roller arranged in the glue tank and attached to the frame so as to rotate around a shaft thereof extending across the path of the clamp unit, the glue application roller applying the glue to the back face of the book block;
a motor attached to the frame and rotating the glue application roller, a part of the glue application roller being soaked in the glue of the glue tank, the glue application roller engaging with the back face of the book block at its top face covered with the glue;
a wiper attached to the frame and arranged upstream of the top face of the glue application roller in a direction of rotation of the glue application roller in such a way that the wiper can contact and separate from an outer periphery of the glue application roller to adjust an amount of the glue covering the outer periphery of the glue application roller;
a wiper drive mechanism attached to the frame so as to move the wiper; and
a control unit configured to control the wiper drive mechanism,
the wiper being movable between an open position in which the wiper is separated from the outer periphery of the glue application roller and a closed position in which the wiper is brought into contact with the outer periphery of the glue application roller at a timing determined based on the information about a length of the back face of the book block, the information about a position of the book block on the path of the clamp unit, a speed of movement of the book block, a distance from the top face of the glue application roller to the wiper in a circumferential direction of the glue application roller, and a speed of the outer periphery of the glue application roller, so that the back face of the book block can engage with the top face of the glue application roller covered with the glue of the predetermined thickness while the book block passes through the glue application roller, wherein
the wiper is sequentially located at a first open position in which the wiper is separated from the outer periphery of the glue application roller by a first distance, a second open position in which the wiper is separated from the outer periphery of the glue application roller by a second distance which is shorter than the first distance, and the closed position during the passage of the book block through the glue application roller, whereby a leading end portion of the back face of the book block engages with the top face of the glue application roller covered with the glue of a first thickness while middle and tail end portions of the back face of the book block engages with the top face of the glue application roller covered with the glue of a second thickness which is smaller than the first thickness.

2. The perfect binding machine according to claim 1 , wherein, on the way to the closed position from the second open position, the wiper is located at a third open position in which the wiper is separated from the outer periphery of the glue application roller by a third distance which is longer than the second distance.

3. The perfect binding machine according to claim 1 or claim 2 , wherein the glue application roller is rotated in a forward or backward direction of the direction of movement of the book block.

4. The perfect binding machine according to claim 3 , wherein the wiper is fixed to a rotary shaft attached to the frame and extending across the path of the clamp unit in such a way that the wiper swings with rotation of the rotary shaft,
the wiper drive mechanism comprises:
a motor attached to the frame and having a drive shaft extending parallel to the rotary shaft;
a first lever fixed to the drive shaft of the motor so as to swing with rotation of the drive shaft; and
a second lever fixed to the rotary shaft so as to swing with rotation of the rotary shaft, wherein
a pin is attached to the distal end of the first lever and guided within a recess formed on the distal end of the second lever in such a way that the first and second levers are operatively connected with each other, and the first and second levers swing in directions toward and away from the outer periphery of the glue application roller with clockwise and counterclockwise rotations of the drive shaft of the motor, whereby the wiper swings between the position in which the wiper contacts with the outer periphery of the glue application roller and the position in which the wiper separates from the outer periphery of the glue application roller.

5. The glue application unit according to claim 2 , wherein the glue application roller is rotated in a forward or backward direction of the direction of movement of the book block.

Assignees

• Nakanishi Hirohito
• Ohuchiyama Kou
• Yokogi Takehito
• Onodera Akira
• Horizon Int Inc

Inventors

• Nakanishi Hirohito
• Ohuchiyama Kou
• Yokogi Takehito
• Onodera Akira

Classifications

• B42C9/0006

  by applying adhesive to a stack of sheets · CPC title

• B42C9/00

  Applying glue or adhesive peculiar to bookbinding · CPC title

• B42C9/0018 Primary

  for binding stacks of sheets one at the time · CPC title

• B42C9/0012

  with a roller (B42C9/0043 takes precedence) · CPC title