US921674A - Apparatus for producing reinforced pulp-board. - Google Patents

Description

' W. W; CLARK.

RO DUGING REINFORCED PU APPLICATION FILED FEB. 5, 1907.

LP BOARD.

APPARATUS FOR P Patented May 18, 1909.

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W. W. CLARK. APPARATUS FOR PRODUCING REINFORCED PULP BOARD. APPLICATION FILED FEB. 5, 1907.

Patented May 18, 1909.

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v II W. W. CLARK.

ODUOING REINFORCED PULP BOARD; APPLICATION FILED FEB. 5,

APPARATUS FOR PR Patented May 18, 1909.

' neapolis, in the county ofl-lennepin and the left, are similar rollers orcylindcrs 4, the

bearings in the sides of the frame 1. The

UNITED sTATnsPATENT OFFICE.

WILLIAM W. CLARK, OF MINNEAPOLIS, MINNESOTA.

APPARATUS FOR PRODUCING REINFORCED PULP-BOARD.

Specification of Letters Patent.

Patented May 18, 1909.

Application filed February 5, 1907. Serial No. 355,803.

To all whom it may concern: Be it known that 1, WILLIAM W. CLARK, a citizen of the United States, residing at Min-. 1 1

State of Minnesota, have invented certain l new and useful Improvements in Apparatus for Producing Reinforced Pulp-Board and I do hereby declare the followin to be a full, clear, and exact description of the invention,

such as will enable others skillod in the art to which it appertains to make and use thel same.

My present invention has for its object .to provide .a simple process and apparatus or machine for producing reinforced pulp board, l and to this end it consists of the novel steps of treatment and the novel devices and combinations of devices hereinafter described and defined in the claim.

An apparatus of novel construction for carrying out the novel process herein disl closed and claimed is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the solveral views.

Referring to the drawings, Figure 1 is a plan view of the improved apparatus or machine, some parts being broken away. Fig. 2 is a side elevation of the improved ap tus or machine; and Fig. 3 is a verticaf tion taken through the machine on x m of Fig. 1f

This improved process is a continuous l process in which wood pulp is simultaneously applied to opposite sides of a reticulate woven wire reinforcement, and is pressed together so as to unite the fibers through the interstices or openings in the metallic reinforcement. The pulp, after it has been applied to the opposite faces of the woven wire reinforcement and pressed together, is further and successively compressed until it is brought to the proper compactness and thickness.

The machine involves a suitable framework indicated by the numeral 1. In suitable bearings in the sides of the frame 1, the l shafts of bed forming rollers 2, 3 and 3 are journaled. The rollers 2 are comparatively large and are preferably in the form of hollow cylinders. Directly overlying but spaced above the three large rollers or cylinders 2 at shafts of which are also journaled in suitable l strata of the pulp. l by the character 2.

three pairs of cylinders 2-4 at the left constit-ute the compression members, and the. said pairs are spaced closer and closer together, successively from the right toward the left. As shown, the shafts of said upper cylinders 4 are journaled in adjustable bearing boxes 5 mounted in suitable seats in the frame 1, and subject to adjusting screws 6, so that the spacing of the cooperating members of the pairs of compression cylinders or rollers may be varied at will.

An endless rcticulate carrier belt 7 runs over the bed rollers 2, 3 and 3. Above that portion of the belt 7 which runs upon the rollers 3 is a pair of pul supplying ioppers 89, both of which, as sliown, are so ported from the frame 1 by brackets 10. oosely journaled on the upper portions of the brackets 10 between the hoppers 8 and 9 is a spin dle 11. upon which is wound a roll of woven wire fabric 12 which is to constitute the metal reinforcement to the pulp board.

Extending longitudinally of the machine,

' at the ends of the upper cylinders 4, is a pair of gage plates 13 which, asshown, are secured to the sides of the frame 1 by adjustable brackets 14. Journaled in these gage plates 13 there is, as shown, a pair of small rollers 15 located between the upper cylinders 4 and cooperating with the small the board. The spacing of the pairs of rollers 3 15 must, of course, correspond approximately to the spacing of the cylinders 2-4 at the right thereof with respect to Fig. 3. Also journaled in the gage plates 13 is an idle wire guiding roller 16 that is preferably provided with projections adapted to pass through the openings in the wire fabric to prevent slipping and to hold the fabric spread being fed between the upper and lower The pulp is indicated Any suitable and well known means may be provided for positively driving the lower cylinders 2, or the lower cylinders 2 and upper cylinders 4,'so that under the rotation thereof in the direction of the arrows marked thereon in Fig. 3, the pulp and the interposed wire fabric q will be positively fed from the right toward the left with respect to Fig. 3, and preferably onto a receivin table 17. When the said rollers are thus riven, the carrier belt 7 will, of course, also be driven in the direction of the line i underlying rollers 3 to prevent buckling of out to the proper width while it is air ers may be employed) the pulp will be com pressed toits final density and thickness required in the board which is being manuioosely andvwith 'slackbetween factured. Furthermore, under this compression, while the pulp ismoist, the fibers thereof will be commingled through the tically integral.

ounted in suitable bearings on the table I 17, there is referably a roller 18 that is provided with aterally spaced trimmingdisks 1 9 k which cut the-edges off from the board which isforc'ed under the same and over the table 1 7. Tosecure the best results, the wire fabric is embedded between the upper and lower portions of. the pulp board in the process formation while it is under initial tension; and to accomplish this, means is shown as rovided for utting the spindle 11 under riction. As shown in Fig. 2, this frictional device is in the form of a set screw 20 passed through one of the brackets 10 and impinging against and at the end of said s indle. metallic reinforcement thus embedhed in the board under initial tension will resist, in the first instance, even-the slightest strain upon the board, whereas a wire fabric 're fabric y, I

pulp will befrollers, a gui openings in the wire fabric, so that the upper and lower strata of the fabricbecomes pracembedded the parts,

Would resist such strains only after its wires have been drawn taut. v

To make board of different widths would, in the constructionillustrated require a sub stitution-of uppercylinders 4 and rollers 15 and 16 of different lengths and would require material to be compressed, of an endless reticulate carrier belt arranged to run between the u per and .lower com ression e arranged to direct t e reinforcing fabric between said'upper and lower compressionrollers, means for delivering the pulp directly onto said carrier belt for appli-' cat1on to the lower face of said reinforcing fabric, independent means v for deliveringpulp directly onto the upper faceof said'-reinforcing fabric, and rigid guide rails ar ranged to confineand form the edges of the pulp body of said board, whereby the pulp app ied to the upper andlower faces of said reinforcing fabrlc will be successively com-f. pressed' to final compactness and thickness with a continuous-action, will be caused to unite between the meshes of said reinforcing .fabric, the surp lu s w ter will be gradually 15 pressed from said pul and the pul body of the board will be formed with para el edges, substantially as described; v p In testimonywhereof I affix my signature in presence of two-witnesses. p

. WILLIAM W. CLARK. Witnesses: MALIE Hoar,

' E. Di MERCHANT.

reinforced pulp

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