US1519280A - Method and apparatus for the manufacture of corrugated board - Google Patents

Description

K. WANDEL METHOD AND APPARATUS FOR THE MANUFACTURE OF CORRUGATED BOARD Filed Jan. 14, 1922 Patented Dec. 16, 1924.

UNITED STATES To all whom it may concem: L Be it known that I, KURT WANDEL, a citizen of the United States, and resident of New York, county of New York, State of N. Y., have invented an Improvement in Methods and Apparatus for the Manufac: ture of Corrugated Board, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts in each of the several views.

This invention relates to the manufacture of corrugated paper board and more particularly to the production of a paper board composed of a corrugated layer having facing layers applied to one or both sides thereof by cement-itious binderof an asphaltic or like waterproof character.- -Diiiiculty has hitherto been experienced in making paper board of this kind in a continuous operation for the reason that the straw board stock of which the corrugated layer is ordinarily made requires to be conditioned or tempered by treatment with water or steam to render the same soft and pliable whereby it is adapted to receive the corrugations, and so that the corrugations will set upon the ting or moistening of the board has rendered it incapable of adhesion with the asphaltic coating of the surface facing layer and has thus rendered it impossible to complete the board by the application of this layer at a single operation. The object of the present invention is to provide an improved method and apparatus whereby the straw board may be wetted or moistened to the required degree, then corrugated while moistened, then immediately dried, and finally united with a coated surface layer atone or both sides thereof in a series of continuing steps of a single operation; The foregoing andother obiects and advantages of the invention will more fully appear from the following with the accompanying drawin s. and the distinctive features of novelty will be pointed out in the appended claims.

Referring to the drawings:

The figure is a diagrammatic view partly in side'elevation and partly in longitudinal vertical section showing an apparatus for carrying out the invention and illustrating the method thereof.

indicates a roll of suitable stock for 'web evenly with the moisture.

drying of the corrugated board. This wetl.

detailed description. taken in connection PATENT OFFICE.

KURT wANnEL, on NEW YORK, N.,Y.- I mnrnon AND APPARATUSFOR THE MANUFACTURE or conauea'rnn BOARD.

Application filed January 14, 1922. Serial No. 529,138.

the production of the corrugated layer, e. g. straw board as customarily employed for this purpose. The web 11 drawn frm this roll is led around guide rolls 12 through a tank 13 containing water and adapted to soften the stock as it passes therethrough. The web is thenled between a pair of rolls 14 adaptedv to promote the saturation of the Thence the web is led around a lower corrugating roll 15 andinto the bite between it and a relatively large upper corrugating roll 16 which meshes with the roll 15. Before reaching the corrugating' roll 15 the paper may be subjected to further moistening and conditioning by steam delivered from an 'apertured steam pipe 17 over which. the web passes. It should be here understood that the web may be softened and conditioned for corrugating either by the use of the steam treatmentfrom the pipe 17 alone, or by its immersion in the tank 13 alone, or by both these means in combination as herein shown as may be found necessary or desirable under the conditions of operation. The corru gating roll 16 is relatively of very large size as compared with the other rolls employed and this roll is heated by steam applied internally thereof in usual mannen The corrugated web is carried around by this roll or drum 16 for a substantial distance. i. e. as shown through half the circumference thereof and it may be held closely pressed into engagement with the drum by an endless belt 17 of felt or the like mounted on rolls 18 so as to engage the web and hold it pressed against the drum. A roll 19 is mounted above the roll 16 in position to co-operate therewith for pressing the coated surface of a facing web 20 into contact with the tips of the corrugations of the corrugated web. The facing web 20 is led from a roll 21 around a guide roll 22 and through a coating station comprising a pair of rolls 23, the lower one of which extends into a tank 24 containing asphalt rendered temporarily fluid by heat or volatile solvent, preferably the former. The dimension of the larger heated corrugated roll 16 is such that the corrugated web borne thereby as described'is substantially dried out so that when it is pressed into engagement with the coated surface of the web 20, it will unite therewith and form a single faced corrugated board as indicated at 25. In case it be desired to produce a double faced corrugated board, another facing web 26 is drawn from a roll 27 through an asphalt coating station 28 and pressedinto enga ement with the lower side of the corrugate layer by a pair of rolls 29, these being located adjacent to the corrugating rolls and so that the single faced corrugated board 25 may be delivered directly thereto. The double faced corrugated board thus produced, indicated at 30,, thus has two asphalt coatings which cementitiously unite the facing layers with the corrugated layer and produce an exceptionally strong and thoroughly waterproof corrugated board. I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than tothe foregoing description to indicate the scope of the invention.

Having describedmy' invention, what I claim as new and desire to secure by Letters Patent is:

1. The herein described method which consists in softening a paper web by saturation with moisture, corrugating the, Web, drying the Web by relatively long contact with a heated element of the corrugating means, and pressing the dried web into contact with an asphalt coated surface of a facing web in a continuous sequence of steps.

2. The herein described method which sists in softening a paper web by saturation with moisture, corrugating the web, drying the web by relatively long contact'with a heated element of the corrugating means, and pressing the dried web into contact with asphalt coated surfaces of two facing Webs at the respective sides of the corrugated web in a continuous sequence of operative steps.

rugated web in contact with said relatively i large roll for a substantial interval suflicient to dry the same, and means for pressing an asphalt coated web into contact with the dried corrugated web.

4. Apparatus of the kind described com- I prising means for saturating a straw board web to condition the same for corrugating, means'for corrugating the web including a relatively large, heated corrugating roll, means for holding and guiding the corruperiod suflicient to dry the same, and means,

for pressing coated facing webs into contact w1th the opposite sides of the corrugated web 1n a continuous sequence of operative steps.

11 testimony whereof, I have signed my name to this specification.

KURT WANDEL.

0o gated web in contact with said roll for a a

Images