US1650049A

US1650049A - Method of producing cloth boards

Info

Publication number: US1650049A
Application number: US592079A
Authority: US
Inventors: Smith Harry Bridgman
Original assignee: LIGHTSHIP CLOTH BOARD CORP
Current assignee: LIGHTSHIP CLOTH BOARD Corp
Priority date: 1922-10-03
Filing date: 1922-10-03
Publication date: 1927-11-22
Anticipated expiration: 1944-11-22

Description

Noy. 22, 1927.

H. B. SMITH METHOD OF PRODUCING CLOTH BOARDS Filed Oct. 5, 1 922 2 heets-Sheet l A a Q m INVENTOR A TTORNE ys H. B. SMITH METHOD OF PRODUCING CLOTH BOARDS Nov. 22, 1927.

Filed Oct. 5, 1922 2 Sheets-Sheet 2 i A TTORNE Ys Patented Nov. 22, 1927.

UNITED, STATES PATENT OFFICE.

BRIDGMAN SMITH, 0F BROOKLYN, NEW YORK, AS8168 OR TO LIGHTBHIP CLOTH BOARD CORPORATION, OF BROOKLYN, NEW YORK, A CORPORATION 01' new YORK.

METHOD 0] PRODUCING CLOTH BOARDS.

My invention relates to methods of producing cloth boards of especially strong and economical laminated constructlon, by what .I call continuous operations, thatns to say, by advancing certain of the materials 1 n continuous strip form and performmgvarious operations upon the materials during such advance. l/Vhile the advancing movement of the materials may be uninterrupted,

0 it is not necessarily so, since in some cases intermittent movement may be provided for without departing from the general plan of advancing the materials in a predetermined course, or through a definite series of work positions until completed individual articles, such as clothboards, are finally produced. While some of the materials are initially advanced in continuous or strip form, it is not essential that all of the materials shall be so advanced, and, in fact, animportant feature of the invention is the provision of means for advancing and properly associating with the continuous or strip materials, successive blanks or separate sheets or pieces of material, as more fully explained hereafter.

Cloth boards used as cores or winders for certain classes of fabrics, for instance, woolen fabrics, are subjected to especially heavy strains, and these strains are especially severe in the transverse direction of the board. These severe transverse strains are caused by shrinkage of the goods which is frequently 'sufiicient to crack or break transversely boards as at present constructed, and especially expensive and heavy board structures are therefore provided for this class of fabrics in order to prevent bending, cracking, or breaking of the boards. An important object of my invention is to provide improved methods of producing laminated cloth boards of fibrous sheet material, usually cardboard or pulp board, in which the fibre arrangement of certain of the layers or laminations is generally in a longitudinal direction of the board, while the fibre arrangement of other laminations is in the transverse direction of the board to give the desired lateral stifiness to resist the compression strains of fabric such as woolens, and to also provide, when necessary or desirable, a smooth covering for the laminated core or body of the board.

The characteristics and advantages of the invention .are further sufliciently explained in connection with .the detailed description of the accompanying drawings which show certain representative forms of the cloth boards produced, and also show in a diagrammatic way certain production methods, and in these method diagrams certain instrumentalities for performing some of the operations are indicated in a diagrammatic way although it is not attempted to show complete mechanisms, nor is there any limitation as to the mechanisms or instrumentalities which may be employed to'perform the different operations, and in fact, the process may be carried out in its various forms entirely by hand or with the aid of elementary hand implements.

After consideringthese various exemplifications of the invention persons skilled in the art will understand that many modifications may be made, and I contem late the employment of any methods w ich are properly within the scope of the appended claims. I

In the drawings:

Figure 1 is a diagrammatic view showing one performance of the process. I

Figure 1 is a continuation of Fig. 1.

Figure 2 is a top plan of the underlying portion of Fig. 1.

Figure 2 is a top plan of the underlying portion of Fig. 1*.-

Figure 3 is a perspective view of the materials as they are associated and formed by the process of Figures 1 and 1.

Figure 4 is a perspective View of a completed cloth board produced by the method of Figures 1 to 3.

Figure 5 is a perspective view illustrating materials in process of association and formation to produce another form of the cloth board.

Figure 6 is a transverse section sufiiciently explaining the structure of a cloth board produced by the method of Fig. 5.

Referring first to the process as explained in Figures 1 to 3 inclusive,

continuous strips

1, 2 and 3 of suitable fibrous sheet material, such as pulp board or cardboard of suitablev grade and thickness, are advanced toward different points of assembly contact, and usually the strips are most conveniently suppliediin the form of rolls 4, 5 and 6 respec tively, and continuously advanced from the rolls, the word continuously as here used being in the broader aspect of the invention considered to cover either the continuous form of the strips during various assembly operations, or to the enerally continuous advance movement, which, however, may be checked or interrupted at different olnts, depending on the nature of the operatlons or apparatus employed. In a more restricted sense, however, and in accordance with certain preferred forms of the method, the advance movement of the continuous strip materials may be uninterrupted.

The fibres in sheet material of this class are generally arranged more or less in the direction of the length of the strip as it comes from the roll, this fibre arrangement in the continuous lon itudinal strips being sufiiciently indicated y longitudinal shading in Fig. 3. Such material has very substantial resistance to longitudinal bending, but owing to the fibre arrangement has less resistance to transverse bending, that is to say, strains applied which tend to bend or crush the material widthwise; and to provide the desired additional widthwise or transverse strength in the completed board, it is desired to supply one or more layers of similar material in which the fibre arrangement is transverse the board or at a right angle to the fibre arrangement of the

strips

1, 2 and 3. For this purpose fibrous sheet material with fibres mainly transversely arranged is supplied in the present em odimcnt of the invention between

strips

1 and 2, and between

strips

2 and 3, and while, in the broader aspect of the invention, there is no limitation as to the manner in which the material. in its transverse fibre arrangement may be supplied, in the presentperformance of the process this sheet material with the transverse fibres is desirably supplied in the form of separate pieces of convenient length which are fed consecutively between the continuous strips so as to form in practical effect a continuous layer or lamination.

In accordance with this .embodiment. of the process a plurality of pieces 7 of the sheet material cut to a suitable length are arranged in a stack holder 8. These pieces are desirably produced by cutting them transversely from a continuous roll of the sheet material of suitable width, and they are then arranged in the stack so that the fibres of the material run transversely, as is v sufiiciently indicated by transverse. surface shading in Fig. 3. The width of these pieces, as also clearly indicated in Fig. 3, is the same as the width of the

continuous strips

1, 2 and 3. The stack holder 8 is positioned so that the pieces 7 are fed successively from the stack at suitable intervals, any suitable bottom feed mechanism 9 being provided for this purpose in the present instance.

A plurality of similar sheets or pieces 10 is also similarly arranged in a stack holder for stack 11. As the

sheets

7 or 10 are separated and advanced from their stack they may be definitely fed forward between the respective continuous strips by any suitable feed mechanism, such as co-operative rolls 12 and 13, and the action of these feed rolls is regulated so that the forward edge of one sheet is brought in contact with the rear.

edge of the preceding sheet as the sheets pass between the continuous strips, and desirably a buckle as at 14 is produced in each piece as it is brought in contact with the preceding piece to insure proper end contact of the pieces in the continuous assembly.

It is of course desirable to secure the materials tightly together, and for this purpose a suitable adhesive, such as glue, is supplied in any suitable way. Evidently glue may be supplied to surfaces of the continuous strips, or to both surfaces of the filler pieces such as 7, or to one surface of one of the strips and to one surface of each of the filler pieces. Referring now particularly to the method of producing the partial assembly consistin of the

strips

1 and 2 with their intermediate filler pieces 7, glue'is sup plied to the under surface of strip 1 by any suitable glue mechanism including a glue roll 15, and glue is supplied to the under surfaces of the pieces 7 by the feed roll 13 previously mentioned, which in the present instance also acts as a glue roll and is supplied with glue in any suitable way, for instance, by the glue trough and distributing roll 16. The parts of the preliminary or partial assembly 17, consisting of

strips

1 and 2 and consecutive pieces 7, are then passed between pressing rolls 18 and firmly pressed together.

At the same time in the present performance of the process another preliminary or subordinate assembly 19 is produced consisting of the continuous strip 3 and the consecutive pieces 10, and in this instance the under surfaces of the pieces 10 are glued by roll 13 which acts as a .glue roll in the same manner as described in connection with the roduction of the other subordinate assemly; and the materials composing the subordinate' assembly 19 are pressed together by rolls 20. The two subordinate assemblies are then brought together and pressed between rolls 21 with adhesive r-eviously supplied, for instance, by a g ue-roll 22 arranged to supply glue to the under surface of strip 2.

To provide a suitable smooth finish for thebody or core structure, a strip of cover material 24, which may be sheet material of any suitable character, usually paper or cardboard thinner than the filler materials, and when desired of a better quality, s advanced from a roll 25 and over any suitable guide rolls, such as 26 and 27, and associated with the advancing assembly 23. Prior to contact glue is supplied to unite the 'cover with the core assembly, and desirably 1n the present instance this glue is applied to a surface of the strip 24, that is, the surface which is to engage with the filler assembly 23, by a glue roll 28. The complete assembly, consisting of the com osite filler and the cover sheet, is then pass through any s u1table cover folding and forming mechanism, sufiiciently indicated in the present instance by a folding channel 30 having side walls suitably curved to gradually bend margins of the cover sheet 24 upward and then over upon the upper surface of the core assembly, that is, the upper surface of strip 1, with the cover material smoothly overlying the edges of the'core assembly, until the core is entirely covered with the cover sheet as indicated at the right in Fig. 3. The longitudinal edges 31 may be arranged to more or less closely abut or meet, or alap joint may be provided as shown at 32, Fig. 5. The

edge formation of the' cover may be im-' proved or fixed by edge pressing rolls 33, and the entire assembly may then be pressed between upper and lower pressing rolls 34. The assembly is then cut transversely at regular intervals by any suitable cutting mech anism, sufficiently indicated at 35, producing individual cloth boards B, Figures 1' and 4. These boards, produced by the described performance of the process. include a composite core or filler consisting of one or more, usually a plurality, of longitudinal strips of material with the fibre thereof longitudinally arranged, and one or more, usually a plurality, of interposed layers of sheet material, usually in the form of separate pieces with abutting ends, and with the fibre thereln arranged transversely so that great resistance is provided against widthwise crushing strains as well as against longitudinal bend ing. The core is completely and smoothly encased in a sheet of suitable cover ma terial 24 having smooth edges 36, the corners of which as at 37 may be more or less rounded when desired by the suitable formation or action of the edge pressing rolls 33.

Figures 5 and 6 show another form of cloth board in which certain of the filler layers may consist of sheets of fiat fibrous material with the fibres running lengthwise of the board. for instance,

sheets

1, 2 and 3 as in the previous example, with alternating layers of substantially cellular or corrugated fibrous sheet material 40 and 41, the corrugations of which in the present instance are arranged transversely of the board to impart the greatest possible lateral stiffness. In producing this type of board according to a method sufficiently illustrated in Fig. 5, the corrugated sheets are most desirabl supplied in the form which is known as ouble faced corrugated board in which the corrugated materal is covered on both sides with a sheet of fibrous material, such as suitable paper or cardboard 42 and 43, these facing sheets being adhcsively secured to the crests of the corrugations. Double faced corrugated board of this sort may be cut into pieces similar to the

pieces

7 or 10 in the previous example of the invention, and may then be handled in a similar way in producing a continuous core assembly as shown in F 1g. 5, adhesive being of course supplied between the outer sides of the facing sheets 42 and 43, and the adjacent surfaces of the

continuous strips

1, 2 and 3, and the assembly being suitably pressed and then enclosed in a cover sheet 45, substantially as in the previous example, the cover material in this case, however, being wide enough to provide a lap joint 32.

This form of construction, with the corrugated filler sheets, provides a board which is in some cases lighter than the other form while providing sulficient strength and stiffness, and particularly sufficient strength to resist transverse crushing or bending strains for certain classes of goods.

Certain parts or all of the filler materials may be impregnated or otherwise treated when desired with suitable strengthening or stiffening materials. For instance, the corrugated sheet material 40, which in many cases may be of relatively low grade and cheap material such as strawboard', may be impregnated or otherwise treated with a solution 'of sodium silicate, or a suitable glue size, and similarly when necessary or desirable the other filler material, such as the

sheets

1, 2, 3, or the

filler pieces

7 or 10, may be similarly treated to provide additional strength or stiffness.

' I claim:

1. A method of producing composite structures of the class described, consisting of multiple layers of sheet material such as card board, comprising advancing a continuous web of such material, advancing and associating with the web such material to cover successive areas of the web and form a. core structure, and folding and securing laterally projecting portions of the web at the opposite side of the core structure.

2. A method of producing composite structures of the class described, consi ting of multiple layers of sheet material such as, cardboard, comprising advancing a continuous web of such material, and advancing and associating with the web successive pieces of such material in edgewise contact to form a continuous core structure, and folding and securing laterally projecting portions of the web at the opposite side .0 the core structure.

3. A method of producing composite structures consisting of multiple layers of sheet-material such as cardboard, comprising advancing a continuous web of such material, advancing and applying to the web successive pieces ofsuch material to form a. core structure, and folding and securing side portions of the continuous'web to enclose the core structure and form a cover therefor.

4. A method of producing composite structures of the class described, consisting of multiple layers of sheet material, such as cardboard, comprising advancing a continuous web of such material, and advancing and ast'ociating with the web successive pieces of such material in edgewise contact to form a. continuous core structure, folding and securing laterally projecting portions of the web at the opposite side of the core structure, and.

6. A method of producing cloth boards and similar articles comprising advancing a continuous strip of sheet fibrous material, advancing successive pieces of sheet fibrous material of substantially the same width as the strip and securing said pieces adhesively on a surface of the strip in endwise contact with each other, enclosing the associated materials in a cover sheet, and severing the assembly so produced transversely at intervals to produce individual cloth boards.

7. A method of producing cloth boards and similar articles comprising advancing two strips of sheet fibrous material, advancing successive pieces of sheet fibrous material and adhesively securing them in endwise contact between the two str ps, enclosing the core assembly so produced in an envelope of sheet fibrous material, and severing the complete assembly transversely at intervals to produce individual cloth boards. a

8. A method of producing cloth boards and similar articles comprising advancing two continuous strips of sheet fibrous material in which the fibres are arranged mainly longitudinally, advancing successive pieces of sheet fibrous material in which the fibres are arranged mainly transversely, adhesiveand similar articles comprising advancing a plurality of continuous strips of sheet fibrous material in which the fibres are arranged mainly longitudinally, advancing successive pieces of sheet fibrous material in which the fibres are arranged mainly transversely and adhesively securing said pieces in endwise contact between each two continuous strips, thus producing a core assembly, advancing a continuous strip of sheet fibrous cover material, folding the cover strip about the core assembly and adhesivcly securing it to form a continuous envelope, and severing the complete assembly transversely to produce individual cloth boards.

10. A method of producing cloth boards and similar articles, comprising advancing a continuous corc strip of cardboard, advancing successive individual core pieces of cardboard of a width substantially equal to that of the continuous strip, and securing said pieces to a face of the strip approximately in edgewise contact, advancing a continuous sheet of cover paper and folding and adhesively securing the cover sheet about the combined core materials to substantially enclose the same.

11. A method of producing cloth boards and similar articles comprising advancing a continuous corestrip of cardboard, ad vancmg successive individual core pieces of cardboard of a width substantially equal to that of the continuous strip, and securing said pieces to a face of the strip approximately in edgcwise contact, advancing a continuous sheet of cover paper and foldingand adhesively securing I the cover sheet about. the combined core materials to substantially' enclose the same, and severing the combined materials at regular intervals to produce the individual cloth boards or similar articles.

12. A method of producing cloth boards and similar articles, comprising advancing a continuous core strip of cardboard, the fibres of which are principally longitudinally arranged, advancing successive individual core pieces of cardboard of a width substantially equal to that of the strip and applying the individual pieces adhesively to a face of the strip in approximately edgewise contact and with .the individual pieces arranged so that their fibres are arranged principally transversely of the continuous strip, advancing a continuous sheet of cover paper and folding and adhesively securing the cover strip about the combined core materials to isubsiantially enclose them.

13. A method of producing cloth boards and similar articles, comprising advancing a continuous core strip of cardboard, the' fibres of which are principally longitudinal- 1y arranged, advancing successive individual core pieces of cardboard of a width substantiallyequal to that of the strip and applying the individual pieces adhesively to a face of the strip in approximately edgewise contact and with the individual pieces arranged so that their fibres are arranged principally transversely of the continuous strip, advancing a continuous sheet of cover paper and folding and adbesively securing the cover strip about the combined core materials to substantially enclose them. and then severing the composite assembly transversely at regular intervals to produce the individual articles.

14. A method of producing a composite core structure, comprising advancing a continuous strip of cardboard core material, advancing successive pieces of cardboard and aflixing them in approximately edgewise contact upon the strip to form a partial continuous core assembly,producing another continuous partial core assembly in a substantially similar manner, and bringing and adhcsively securing the two partial assemblies together in facial contact.

15. A method of producing cloth-bohrds or similar articles, comprising advancing a. continuous strip of cardboard core material, advancing successive pieces of cardboard and atiixing them in approximately edge wise contact upon the strip to form a partial continuous core assembly, producing another continuous partial core assembly in a substantially similar manner, bringing and adhcsively securing the two partial assemblies together in facial contact, advancing a continuous strip of cover paper, folding and adhesively securing the cover strip about the combined core materials to substantially enclose the same, and severing the complete assembly so produced transversely at regular intervals to produce the individual articles. l

.16.'A method of producing composite of such material in 19. A method, of producin structures consisting of multiple layers of sheet material such-as cardboard, comprising advancing a continuous web of" such matcrial, advancing another continuous websive separate pieces of such material in parallel relation to the continuous web, and applying and securing the separate pieces to the continuous web with their ends abutting to form a continuous core structure.

- 18. A method of producing composite structures consisting of multiple layers of sheet material such as cardboard, comprising advancing a continuous web of such material, advancing successive separate pieces arallel relation to the continuous web, app ying and securing the separate pieces to the continuous web with their ends substantially abutting to form a core structure, and folding and securing laterally. projecting portions of the continuous web to the opposite side of the core structure. I

composite structures consisting of multip elayers of t a sheet material such as cardboard, comprising advancing a plurality of continuous webs of such material, applying successive se arate pieces of such material and,secur1ng them to each of the continuous Webs, bringing the several webs with their applied pieces together andv securing them to form a continuous composite assembly, and severing the assembly transversely at regular intervals to produce individual composite pieces.

Signed at New York city in the county of New York and State of New York this 27th day of September, A: D. 1922.

HARRY BRIDGMAN SMITH.