US798597A - Art of making paper. - Google Patents

Description

No. 798,597. I PATENTED SEPT. 5, 1905.

' "R. S. GASE.

ART OF MAKING PAPER.

APPLICATION FILED JULY 23, 1902.

wammw I W d3 I 6% k attorney-Z,

UNITED STATES PATENT CFFTCE.

ART OF MAKING PAPER.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed July 23, 1902. Serial No. 116,599.

To all whom, it may concern.-

Be it known that I, RAYMOND S. CASE, a citizen of the United States, and a resident of Unionville. in the county of Hartford and State of Connecticut, have invented certain new and useful Tm provemen ts in the Art of Making Paper, of which the following is a specification.

The invention relates to the paper-making art, and more particularly to improvements in the particular class of paper which has been formerly made as a single and continuous web and then subdivided into a number of webs or sheets.

The object of the invention is to produce webs of paper having improved characteristics as to uniformity of thickness, width, &c., as will be hereinafter fully set forth, a plurality of such webs being simultaneously formed in a single machine.

It has been common practice in the art to form a single web of paper, subject said web to a drying process, and then cut the web into a plurality of strips; but this for certain purposes has been very unsatisfactory, as it has been almost impossible to secure a uniform and proper shrinkage upon a single wide'web of paper.

In the process hereinafter described the difficulties of improper shrinkage have been overcome and it is possible to secure webs or strips of uniform Width and density, at the same time providing a plurality of plies.

Referring to the drawings, Figure 1 is a diagrammatic View illustrating the method of carrying out the improved process. Fig. 2 is a diagrammatic view of a portion of the mechanism, showing also a mold for laying the paper in individual Webs.

1n the accompanying diagrams the numerals 1, 2, and 3 designate cylinder-molds cooperating with the wet apron or felt 4: and adapted to lay the stock upon said apron or felt in a plurality of individual and continuous webs; Any number of cylinder-molds may be employed, and these molds may be used to produce a paper of one or more ply. These molds and the wet apron are of any ordinary and well-known construction and are operated in the usual manner, although the molds themselves are provided with deckles 5, which separate and cause the formation of a series of webs. These deckles are of a nonforaminous structure" and by their position leave between them foraminous paper-forming sections of annular shape.

The numerals 6, 7, and 8 denote the ordinary couch-rolls,which cooperate with the cylinder-rolls l, 2, and 3. As the stock is laid upon the wet apron 4 in a series of thin webs or plies by each of the molds and the individual webs of paper are laid thereon the webs or plies of the first cylinder against the apron and the webs of each succeeding cylinder overlying webs or plies formed on the next preceding cylinder, the apron carries these individually-formed plied ,webs forward and passes them through the primary or first pressrolls 9, where the several plies of the webs of paper are compacted to a certain degree. The several formed webs are then carried forward and passed in the usual manner through the secondary or second press-rolls 10, which are used in connection with an apron 11. From the second press-rolls the individual webs are subjected to a drying process which may be secured in any of the well-knownmanners known to the art. As illustrated herein, the webs are passed over a series of dryingrolls 12, where the moisture contained in the webs is driven off and the webs are partially finished.

It is to be noted that the several individually-formed webs composed of several plies are simultaneously subjected to the same drying heat and that the plied webs are formed and subjected to the drying process in the continuous process of manufacturing paper. After these webs leave the drying process they are passed through any desired form of finishing mechanism and may of course be subsequently divided into sheets, although it is to be noted that from the time the stock is laid upon the wet apron until it leaves the drying apparatus it is in the form of a plural number of distinct, individual, and continuous webs formed and traveling along side by side.

The deckles 5 upon the cylinder-molds may of course be varied to suit the exigencies in any particular case and by their position is determined the width of the webs which are formed. In practice these deckles are ordinarily arranged to provide a series of webs' of uniform width, although, of course, one portion of the cylinder-mold might be arranged as to its deckles to provide two or more webs of one width, while the remainder of the mold might be subdivided by deckles to produce one or more webs of a different width.

Obviously changesas to the details and means for carrying out the process might be varied to a great extent without departing IIO from the spirit of the invention, which contemplates the formation of a plurality of dis-' tinct plied Webs of paper simultaneously and side by side upon the same molds and subjecting said Webs simultaneously to a drying process.

' What I claim as my invention, and desire to secure by Letters Patent, is

1. An improved article of manufacture consisting of a sheet of paper simultaneously formed with other sheets all side by side upon the same cylinder, said sheets constituting independent and separate webs of substantially uniform thickness from edge to edge, and each Web consisting of a plurality of plies, said plies of each Web being simultaneously formed upon a cylinder-mold and laid upon asingle blanket, and the several succeeding plies of each Web being formed side by side upon separate molds and laid successively over the plies formed upon the first named mold of the series, the plied webs being thus simultaneously carried upon a single blanket and simultaneously subjected to action of pressing devices and to the action of driers whereby sheets of uniform character, strength and width are formed by being simultaneously subjected to identical conditions of formation, shrinkage and finish.

2. An improved article of manufacture consisting of a sheet of paper simultaneously formed with other sheets all side by side upon the surface of the same cylinder-mold, each of said sheets being of a substantially uniform thickness from edge to edge and consisting of a plurality of films or plies, said plies being laid upon a traveling apron or blanket, and said sheets also consisting of other similar series of plies successively formed upon molds having making-surfaces registering with those of the next preceding cylinder, whereby the successively-formed plies are laid upon a single blanket or apron, one over the other, the several plied Webs thus simultaneously formed side by side upon the blanket being subjected to identically the same conditions of formation, pressing, drying and calendering whereby paper sheets of absolutely uniform character are produced.

RAYMOND S. CASE.

Witnesses:

E. P. CoFFRIN, WM. H. BARKER.

Images