Koppers Company, Inc.

Gordon L Morgret

James Lynwood Cosby

Glenn F Hyde

Charles E Thomas

Harvey A Kasinoff

Roy Ralph Lambert

Richard R Pfunder

Disclosed is an improved safety guard for use with sheet feeding mechanisms which is disposed between the feeding mechanism and the exposed feed roll nip of a mechanism for the processing of the sheet material. The safety guard includes a non-rigid, non-elastic member which prevents an attendant from inadvertently placing his appendages in the exposed nip of feed rolls while not interfering with the passage of the sheet material from the feed mechanism to the feed rolls of the processor. The safety guard adjusts automatically and instantaneously as the width of the sheet material changes to shield the variation in exposure.

Safety guard for sheet feeding mechanisms

An improved corrugator roll for use in an apparatus for making corrugated paperboard wherein the flute tip and a portion flank of the roll base metal are selectively hardened to a predetermined depth by an electro magnetic process. The valleys of the flutes and the remainder of the flank are maintained at the same hardness as the base material.

Corrugator roll

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.

Web guides for corrugator machines

Herein disclosed is a corrugating machine for forming a single-face corrugated paper web from a pair of webs passing therethrough. The corrugating machine comprises a first corrugating roll and a second corrugating roll parallel to and in meshing engagement with the first corrugating roll, the second corrugating roll carries a web of corrugated paperboard material around a portion of the outer periphery thereof. A floating guide continuously urges the corrugated web against the outer periphery of the second corrugating roll and is automatically self-adjusting for compensating for irregularities in the second corrugating roll and the corrugated web. An adhesive roll is in contact with the corrugated web extending around the second corrugating roll for applying adhesive to the tips of flutes on the corrugated web. A pressure roll carrying a facing web on the outer periphery thereof is in contact with the adhesive covered tips of the corrugated web forming the single-face corrugated web.

Corrugating machine having self-adjusting web guides

Herein disclosed is an apparatus for changing the rotary position of a slotter member and for changing the relative position between fixed and movable knives mounted on the slotter member. The apparatus comprises a first rotatable shaft having at least one of the slotter members secured thereto; the slotter member having a fixed knife secured thereto and a movable knife mounted thereon; a driving apparatus; a first phase changing mechanism connected between the first shaft and the driving apparatus for rotating the slotter member; a second rotatable shaft spaced from the first shaft; a linking mechanism connected between the second shaft and the movable knife on the slotter member; a second phase changing mechanism connected between the first shaft and the second shaft for rotating the movable knife through the linking apparatus; and a selectively operable remote control apparatus for operating the first phase changing mechanism to selectively change the rotary position of the slotter member forward and backward with respect to the driving apparatus, the second phase changing mechanism and the linking mechanism maintaining the relative position of the fixed and movable knives during operation of the first phase changing mechanism, and for operating the second phase changing mechanism independently of the driving apparatus to selectively change the position of the movable knife forward and backward relative to the position of the fixed knife.

Growing community of inventors

Baltimore, MD, United States of America

Gordon L Morgret