US1945624A - Taped paper board - Google Patents

Description

Feb, @340 J. WAGNER TAPED PAPER BOARD Filed Aug. 13. 1931 ENVENTOR M M 9- W ATTQRNEYg Patented Feb. 6, 1934 ramp PAPER aoaan Joshua Wagner, Brooklyn, N. Y., aaaignor to Diagonal Corrugated Patent Corporation, Brooklyn, N. Y., a corporation of New York Application August 1:, 19:1. sci-m No. 556.710

8 Claims. (Cl. 154-)- The invention relates to corrugated papen board of the type commonly employed in making cartons, although in a broader aspect, it is applicable to any multi-ply board constructed of paper or paper-like material. In the use of paper board of the above character in cartons or as a wrapping material, and for similar purposes, it is often necessary to secure together the abutting edges of the paper board which form a joint in the carton or wrapper, and this has been most frequently done by applying a strip of gummed tape of paper, muslin, etc. along the joint, either by hand or by machine. One object of the present invention is to provide paper board of the above character with what may be termed a self contained strip or strips of tape which will make a strong and easily formed joint.

The invention also aims to provide a method of making a taped paper board of the above character which may be readily employed in connection with existing methods and machines used in manufacturing paper boardr Further objects and advantages of the invention will be in part obvious and in part specifically referred to in the description hereinafter contained, which description however is to be considered merely as illustrative of its principles. In the drawing- Fig. 1 is a sectional view of a piece of corrugated paper board taped in accordance with the present invention.

Fig. 2 is a similar view showing the joint formed between the abutting edges of a carton blank made out of paper board of the type illustrated in Fig. 1.

Fig. 3 is a vertical sectional view somewhat diagrammatic of certain parts of a corrugating machine modified to make taped corrugated paper board in accordance with the method forming a part of the present invention.

Corrugated paper board of the type in common use has a corrugated liner 1 and a facing sheet 2 secured to one or both sides of the liner. As is well known in the art, this type of corrugated paper board is most usually produced in the form of a continuous sheet wherein the corrugations run perpendicular to the side edges of the sheet, but by the used of special machinery the corrugations may be formed so as to run diagonally as indicated in Figs. 1 and 2, the side edges of the sheet being marked 3.

In accordance with the present invention I interleave a strip of tape 4 between the sheets 1 and 2 of the paper board on one or both side edges thereof, said strip 4 being secured by adheslveto one or both of'the sheets 1 and 2. The trip 4 runs lengthwise along the paper board and pro jects laterally beyond the corresponding side edge 3, and thus when a carton blank constructed of such paper board is folded to form a joint between the side edge 3, the strip or strips 4 overlap the joint and may be secured to the adjacent facing sheet 2 by adhesive 'or in other suitable manner. Where two of the strips 4 are employed, as indicated in gig. 1, the joint in the blank will be doubly reinforced as indicated in Fig. 2, and it should be understood that the tape strips 4 may be of paper, muslin, or similar material, either plain or gummed, or if desired impregnated with a water-proofing compound such as asphalt.

A construction of the above nature is particularly advantageous where the facing sheets of the paper board are made of weak paper and in all instances where a strong joint is desired. The inner surface of the strip 4 which overlaps the facing sheet 2, may be merely wetted and pressed down into place when the joint is formed, if the strip 4 was initially gummed, or the adhesive may be applied to the surfaces at the time the joint is formed.

In Fig. 3, I have illustrated a method'of making taped corrugated paper board of the above character which may be carried out by modifying a corrugating machine as hereinafter described. In the machine chosen for purposes of illustration, the web 1 to be corrugated is first fed from a roll 5 over a preheating roller 6 and then between a pair of heated corrugating rolls 7 and 8 of usual character. As shown, the usual corrugating roller '7 is carried by fixed bearings in the frame-work 9 and the lower corrugating roller 8 is movably supported by bearing arms 10 which are pivoted to'the frame of the machine, the roll 8 being constantly urged upwardly toward roll 'l-by spring members 11 acting between the bearing arms 10 and the frame of the machine. After being corrugated by passing between rolls 7 and 8, the web 1 is carried around on to the upper side of roller 7, a suitable number of fingers 12 being provided to guide the corrugating web 1 around roll '1. As the corrugated web 1 passes around roll 'Ladhesive is applied to the outer or exposed peaks of the corrugated by means of an adhesive roll 13 or other suitable device which picks up adhesive from tray 14. A facing sheet 2 is fed from roll 15 at the foot of the'machine over a pre-heating roll 16 which warms the inner surface of the sheet and then passes between the upper corrugating roll 7 and a heater pressure roll 17 which is urged toward roll '1 by aspring 18,

The tape 4 is fed from a roll 19 mounted in frame 9 past suitable guide rolls 20 and an adhesive applying roll 21, in between the sheets 1 and 2 as the latter passes between rolls '1 and 17, the adhesive applying roller 21 being preferably employed to apply adhesive to that part of the upper surface of the strip of tape 4 which is to be positioned underneath and secured to the inner surface of facing sheet 2.

Single faced corrugated paper board is thereby produced with the strip of tape 4 interposed between the corrugated liner 1 and facing sheet 2 in the position indicated in the right hand portion of Fig. 1.

If double faced corrugated paper board is to be formed, the single faced paper board may be conducted under a roller 22 in contact with an adhesive applying roll 23 to apply adhesive to the peaks of the corrugations, and a second facing sheet 2 may be fed from a roll 24 partially around a preheating roll 25 and then over an idler roll 26 where the second facing sheet comes into contact with the underside of the single-faced paper board. The double faced board is then conducted over a stationary heater 27 and under an endless conveyor 28 arranged to apply suiilcient pressure to hold the second facing sheet and the single "faced paper board in firm contact while the adhesive is becoming set. a

If desired, a strip of tape 4 may be interleaved with the sheets of the corrugated paper board during the operation just described, the strip being fed from a roll 29 past suitable idler rolls 30 and 31, and an adhesive applying" roller 32 to meet the last mentioned facing sheet 2 and the single faced paper board above roll 26. In case a strip 4 has previously been applied in connection {with the single facing operation, double faced corrugated paper board will be formed having two strips of tape extending respectively along its side edges as shown in Fig. l, with the strips 4 in what may be termed complementary positions adapted to form a Joint of the type shown in Fig. 2, when the side edges of the paper board are bent around to meet each other.

The method of incorporating the tape into the paper board as a constituent part thereof, as above outlined, accordingly may be readily combined with the usual operations of making paper board. Paper board of the above character of course avoids the necessity of any subsequent tape applying operation such as is usually employed in making what are known in the trade as standard slotted cartons, of which the carton blank shown in Fig. 2 of the present application may be regarded as typical.

While the invention has been described as embodied in a particular construction of paper board and formed by the above described steps or operations, it is to be understood that changes may be made therein without departing from its essentials, within the scope of the appended claims.

I claim:

1. Paper boardmade up of superposed sheets and having interleaved between certain of said sheets a tape strip rimning along a side edge of the paper board and projecting laterally beyond such side edge.-

2. Corrugated paper board having a facing sheet and a corrugated liner, and a tape strip interleaved between said facing sheet and said liner, said tape strip running along a side. edge of the corrugated paper board and projecting laterally beyond said side edge.

3. Corrugated paper board having a facing sheet and a corrugated liner, and a tape strip interleaved between said facing sheet and said liner, said tape strip running along a side edge of the corrugated paper board and projecting laterally beyond said side edge, and said tape strip 'being secured by adhesive to the paper board.

4. Corrugated paper board comprising a corrugated liner and facing sheets on the opposite sides thereof, and tape strips respectively interposed between said facing sheets and said liner, said tape strips runningalong opposite side edges of said paper board and projecting laterally beyond such side edges.

5. The method of making taped paper board which includes applying adhesive to one face of a traveling paper sheet, pressing said sheet into contact with a second sheet, and feeding a traveling strip of tape in between said sheets prior to the application of such pressure.

6. The method of making taped corrugated paper board which includes corrugating a traveling paper sheet, applying adhesive to the peaks of the corrugations, pressing a facing sheet into contact with such peaks, and feeding a traveling strip of tape in between said sheets prior to the application of such pressure.

7. The method of making taped corrugated paper board which, includes corrugating a traveling paper sheet, applying adhesive to the peaks of the corrugations, pressing a facing sheet into contact with such peaks, and feeding a traveling strip of tape in between said sheets prior to the application of such pressure, then applying adhesive to the peaks of the corrugations on the opposite side of the corrugated sheet, pressing a second facing sheet into contact with said last mentioned peaks, and feeding a strip of tape in between said last mentioned facing sheet and said corrugated sheet prior to the application of such last mentioned pressure.

8. The method of making taped corrugated paper board which includes corrugating a traveling paper sheet, applying adhesive to the peaks of the corrugations, pressing a facing sheet into contact with such peaks and pressing a traveling strip of tape into contact with at least one of said sheets during the operation of making said paper board. JOSHUA WAGNER.

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