US711165A - Apparatus for making closed vessels from pulp. - Google Patents

Description

No. 7||,|s5.

F. B. HowAnn. l APPARATUS FR MAKING CLOSED VESSELS FROM PULP.

(Appicatin ld Jan. 16, 1902.)

Patented oet. I4, |9112.

(No Model.)

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UNTTED STATES PATENT OEEIcE.

FRANK B. HOWARD, OF NEV YORK, N. Y., ASSIGNOR TO LAFLIN da RAND POVDER COMPANY, OF NE YORK, N. Y., A CORPORATION OF NEW YORK. i

APPARATUS FOR MAKING CLOSED VESSELS FR'OM PULP.

SPECIFICATION forming' part of Letters Patent No. 711,165, dated October 14, 1902.

Application iiled January 16, 1902. Serial No. 90.02B. (No model.)

To @ZZ whom, it may concern:

Be it known that I, FRANK B. HOWARD, a citizen of the UnitedStates, and a resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Apparatus for Making Closed Vessels from Pulp, of which the following is a specification.

My invention relates to apparatus for maklo ing closed vessels from pulp, with the object in view of providing simple and effective means for expediting the manufacture of such articles without joint or seam.

My present invention relates more particularly to apparatus for carrying out what I am pleased to call the vacuum process, in which the pulp is forced toward the wall of the mold by internal atmospheric pressure as the pressure is removed from the exterior zo wall of the mold by means of some suitable vacuum applianee-as, for example, an exhaust-pump.

A practical embodiment of my invention is represented in the accompanying drawings,

in which- Figure l is a view of the apparatus in longitudinal section, showing the position of the condensed pulp around the margin of the mold to form the wall of the closed vessel, and

3o Fig. 2 is a transverse central section of the same.

The body of the mold is composed of longitudinalsections--in thepresent instance three longitudinal sections-each forming a third of the body, and these sections are denoted by a, b, and c. They are each formed hollow, the interior space of the section a being denoted by a', that of h by b', and that of c by c. The inner wall of each section is provided with manifold perforations CZ, through which the spaces a', ZJ', and c' communicate with the interior of the mold. The spaces a b c also communicate with one another at the meeting edges of the sections, and the space b is connected, by means of a pipe e, with a vacuum appliance of any well-known or approved form-such, for example, as an exhaust-pump. (Not shown.) The pipeeextends into the hollow through a trunnion f,

projecting from the mold-section b and hav- 5o ing a rotary movement in a bearing g, fixed to a support 7L. The trunnion f is conveniently held in position by means of a setscrew i, which extends through the bearing g into an annular groovej, formed in the periphery of the trunnion f.

From the above it follows that when the exhaust is applied through the pipe e to the interior of the section b it will also aect the sections a and c, which are in communication with the section b.

The several sections a, b, and c are held in assembled adjustment by means of heads 7.a andV Z, each provided with a shallow recess, that in the head 7c being denoted by Za' and 65 that in the head Z by Z', for the purpose of receiving the opposite ends of the assembled sections a, b, and c when the heads are drawn toward each other. The heads are hinged at m to the section Z9 of the mold, and a rod fn, 7o hinged to the section-head Z at n and arranged to swing at its free end into an open slot k2 in the head 7c, has its screw-threaded free end provided with a thumb-nut o for the purpose of forcing the heads toward each other to lock the parts in assembled adjustment and for releasing the rod n to permit the heads to be swung apart when it is desired to remove the completed article.

The heads 7o and Z, like the side sections of 8o the mold, are made hollow, the space within the head Zt being denoted by k3 and that within the head Z by Z2. The inner walls of the head, like the inner sides of the walls of the mold, are also perforated in order to establish communication between the spaces or chambers k3 or Z2 and the interior of the mold. These spaces 7c3 and Z2 are also in communication through pipes p and 1J with the vacuum appliance with which the pipe e eommu- 9o nicates, so that when the said vacuum appliance is operated it will simultaneously tend to produce a vacuum in both the heads, as well as the body, of the mold.

The head 7c is provided in the present in- 95 stance centrally with an opening 7a4 for the reception of a plug q, the latter being projected inwardly from the head 7c a sufficient distance (the thickness of the Wall of the vesplug r', seated Within the plug q, the said vent serving to supply the air-pressure to the interior of the mold when the vacuum appliance is in operation.

The entire interior of the mold is covered with a Wire-gauze 3.

The operation is as follows: The mold having been turned into position with its head 7c uppermost,` as shown in Fig. l, the plug q is removed and the mold is supplied With its charge of pulp in a free-flowing state of suspension. inserted in position and the vacuum appliance set in operation to produce a vacuum Within the body and heads of the mold. This Will cause a flow of the liquid pulp toward all of the walls of the mold and will cause the pulp itself to be deposited under atmospheric pressure, While the Water escapes through the perforations in the mold and through the pipes e, p, and p. When the pulp has been deposited to a sufficient extent to form the Wall of the Vessel, the vacuum may be relieved and the mold turned in a position with its head lo downward to permit the removal of anyremaining suspended pulp, and the mold may then be opened and the vessel removed for drying. What I claim is- The plug, with its vent r, is then.

l. An apparatus for manufacturing vessels through manifold perforations and means for placing a vacuum appliance in communication with the interiors of the hollow Walls of the mold for inducing a deposit of the pulp on the interior of the mold, substantially as set forth.

2. Apparatus for forming closed vessels from pulp comprising a lnold having its body and heads formed hollow, the interior of said hollow heads and body being in communication with the interior of the mold through manifold perforations, a vent extending from the exterior to the interior of the mold the said mold being mounted to rock on its support and means for placing a vacuum appliance in communication With the interior heads and body of the mold for inducing the deposit of the pulp on the interior of the mold, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 2d day of .Iauuary, 1902.A

FRANK B. HOWARD.

Witnesses:

FREDK. HAYNES, C. S. SUNDGREN.

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