Web guides for corrugator machines

• US 4,086,120 A
• Filed: 05/19/1976
• Issued: 04/25/1978
• Est. Priority Date: 07/16/1975
• Status: Expired due to Term

• Current Assignee: United Container Machinery, Inc. (Barry-Wehmiller Group Incorporated)
• Original Assignee: Koppers Incorporated (Koppers Holdings Incorporated)
• Inventors: Morgret, Gordon L., Cosby, James L.
• Primary Examiner(s): Simmons, David A.
• Application Number:
  US05/687,906
• Time in Patent Office: 706 Days
• Field of Search: 156/470, 156/473, 156/205-208, 156/210, 118/245
• US Class Current: 156/473
• CPC Class Codes: B31F 1/28 combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
• CPC Class Codes: B31F 1/2836 Guiding, e.g. edge alignment; Tensioning
• CPC Class Codes: B31F 1/2854 Means for keeping the sheet in contact with one of the corrugating rollers after corrugating, but before applying the facer sheet, e.g. by air pressure, suction or pressing fingers

Abstract

An improved web guide structure of the self-adjusting type for a corrugated web single-facer machine including a plurality of laterally spaced guides for continuously and yieldably urging a corrugated medium web against a lower corrugator roller, a support rigidly mounted to the single-facer for pivotally supporting the guides, and a gravity-actuated and adjustable biasing means for urging the guides against the corrugated web at preselected pressures. The guides preferably include a trailing guide portion that remains in engagement with an adhesive applicator roll when the roll is moved out of engagement with the corrugated web to maintain alignment of the guides with the roll. Springs may also be used in conjunction with the support to apply greater or lesser pressure to all of the guides simultaneously.

The method includes applying pressure at selected lateral locations across the width of the corrugated web, such pressure being yieldably applied to each of the guides by an elastic member or by gravity-actuated counter-weights.

Claims

1. An improved self-adjusting web guide structure for a corrugated web single-facer machine of the type including:

cooperating upper and lower corrugator rolls between which a paper medium web is passed to form corrugations therein;

adhesive roll means, movable toward and away from said lower corrugator roll, for applying adhesive to the flute tips of said corrugations as said web passes around said lower corrugator roll; and

a pressure roll means for pressing a liner web against said flute tips having adhesive thereon, the improvement comprising;

a plurality of laterally-spaced guide means for continuously urging a corrugated portion of said medium web against said lower corrugator roll as said portion advances therearound to pass between said lower corrugator roll and said pressure roll means,

a support means rigidly secured to said single-facer machine, said support means including a support shaft extending along the length of said support means,

an articulated means comprising a plurality of connecting links pivotally supported on said support shaft and pivotally connected to each of said guide means for providing exact alignment of an arcuate portion of said guide means with said lower corrugator roll and permitting substantially unrestricted movement of said guide means toward and away from aid lower corrugator roll,

biasing means connected to each of said articulated means for urging said guide means against said corrugated portion at a preselected pressure, said biasing means being yieldable to compensate for irregularities in said corrugated portion of said web to provide self-adjustment of said web guide structure, and

an adhesive applicator roll having a plurality of laterally spaced circumferential grooves in alignment with said guide means for receiving a portion of said guide means therein to enable said guide means to extend partially around said lower corrugator roll between it and said applicator roll when the latter roll is in adhesive applying engagement with said corrugated portion of said web, said guide means each include a trailing guide portion adapted to remain in said grooves when said applicator roll is moved to an inactive position out of engagement with said lower corrugator roll.

2. The apparatus of claim 1 wherein said biasing means includes:

a counterweight means connected to each of said articulated means for urging said guide means against said corrugated portion of said medium web at a pressure proportional to the weight of said counterweight means.

3. The apparatus of claim 2 wherein said counterweight means is selectively movable between a high pressure applying position and a low pressure applying position for varying said preselected pressure of said guide means against said corrugated portion of said web.

4. The apparatus of claim 3 wherein said articulated means includes:

a resilient spring means secured to each of said guide means and to said support shaft operable upon partial rotation of said support shaft for simultaneously increasing or decreasing the pressure applied to said corrugated portion of said web by all of said guide means.

5. The apparatus of claim 3 wherein at least a lower tip portion of said guide means includes a coating of low friction material.

6. The apparatus of claim 3 further including:

hook means, supported by said support means, engageable with selected ones of said guide means for moving said selected guide means to an inoperative position.