Production of heavy paper
US 1315924 A
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F. H FULLER. PRODUCTION OF HEAVY PAPER, &c.
APPLICATION FILED JUNE3I I918.
Patented Sept. 9, 1919.
UNITED STATES PATENT- OFFICE.
FRED H. FULLER, OF WATERTO'WN, NEW YORK.
PRODUCTION OF HEAVY PAPER, &o.
Specification of Letters Patent.
Patented Sept. 9, 1919.
Application filed June 8, 1918. Serial No. 237,931.
To all whom it may concern:
Be it known that I, FRED H. FULLER, a citizen of the United States, residing at Watertown, in the county of J eflerson and paper.
Its object is to provide for greater efli-.
ciency and economy of manufacture and especially to enable the ready production and handling of thick sheets, such as box board or heavy paper, and'to rapidly and successfully manufacture cellucotton made from bleached sulfite pulp as a substitute for the ordinary cotton commonly used in hospi tals etc. To do this efl'ectively I provide a method ciently a thick but porous sheet.
. To these ends my invention comprises the method set forth in the appended claims and the parts and combinations of parts there recited.
In the drawings Figure 1 is aside eleva-1 tion partly in section Fig. 2 is aplan View; In these drawings I have illustrated a combined Fourdrinier and cylinder machine. The arrangement of the parts enables me to run a sheet of any desired thickness.
In these drawings 10 represents a flow box and 11a head box having a lip 12 extending to the top of a cylinder mold 13, which I. employ instead of the customary solid iron breast roll. 14 is'the makingwire or wire-cloth which passes around the cylinder mold and, on the upper run, over the table rolls 15, and on the lower run over suitable guiding and tension rollers 16 making its outer or final turn about a blowing roll 17 18 represents deckle straps running over pulleys 19 and 20 and arranged above the making-wire in the customary manner. 21 represents customary suction boxes arranged beneath the makin wire. 22 is a hot air chamber through w 'ch passes the upper run of the making-wire carrying the material being treated, the inlets for the hot air being illustrated at'23 and the, outlet at 24.
17, as described, is a roll which takes theand a machine that will handle effie upper run of place of the customary suction roll, but in this case is'a blowing roll. That is to say, air is blown through the openings in the .roll instead of being drawn in through those openings and through the material. 25 is a carrying cloth or wire turning about pulleys 26 and 27 and having a customary guiding and tensioning roller 28 and a guide roller 29 which directs the material now dried between the cutters 30, comprising two opposed outting wheels carried by the frame 31. 32 represents a table upon whichsections of dried sheets are placed as they come from the cutter. 34 is the customary pump for the return water.
In using this apparatus the stock flows on to the making-wire from the head box, he
ing held back by the customary slice not shown to enable the water to largely leave the stock and permitting the material to flow on to the making-wire in as thick a sheet as desired, this being regulated by the deckle or rubber strap holding the pulp in place on the wire.
As the pulp passes along on'the upper run of the making-wire the remaining water is drawn out by the suction boxes, leaving the material still damp.
I The cellucotton must not. be pressed and it will be observed that I have dispensed with all pressure and couch rollers. It is necessary that the material be kept very porous. The making-wire or the wire-cloth carrying the partly dried substance now passes through the hot air chamber 22' where it receives blasts of hot air, the air" passing through the sheet from the bottom upward and out of thegtop of the chamber.
This chamber may be of any desired length, suflicicnt to thoroughly drythe substance.
The sheet now passes over the roll 17.
Instead of having here a suction roller and applying a vacuum I blow air into and through this roll so as to cause the sheet to be blown off from the making-wire or wirecloth to the carrying device 25 to be directed to the cutter 30 and thence delivered to the table 32. The cellucotton is therefore formed'and carried through the machine without undergoing any pressure andit will be delivered in a porous, spongy condition.
It will be observed also that the stock flows on to the making-Wire from the top side of the cylinder mold. Ordinarily cylinder machines pick up the stock as the cylinder revolves. This permits a certain thickness of the pulp to stick to the mold, and in order to make a thick or heavy paper in such case it is necessary to use a number of cylinder molds and to unite the sheets bypressing them together on the last mold. By no method of flowing the pulp over the top 0 the cylinder miold andonto the making-wire, as described, I free the pulp of water and get the desired thick sheet suitable for all grades of paper and especially for such a production as cellucotton.
1. In a pulp drier, the combination of a flow box, a head box, a cylinder mold in the head box,'means for flowing the stock over the cylinder mold --.and Fourdrinier c0nnections receiving the stock.
2. In a ulp drier, the combination of a making roll and associated devices for carrying the'stock, of a blowing roll at the finishing end of the making wire, and a hot air receptacle surrounding the end of the making wire.
3. In a pulp drier the combination of a making wire and table rolls, of a hot air nation of a flow box or chamber inclosing the finishing end of the table rolls'and making wire, and means for supplying air to the chamber.
4. A combination Fourdrinier and cylin-' for blowing air through the treated material I after it is heated to loosen it.
5. In apaper making machine, the combivat, a head box, a cylinder in the head box, a making wire passing about the cylinder, and means for feeding and drying the stock Without subjecting it to pressure.
6. In a pulp drier, the combination of a making-wire, a roll over which passes the rear. end of the making-Wire, means for blowing air through the roll and the materlal, a carrier to receive the material, and cutters lying above the carrier.
In testimony whereof-I afiix my signature.
FRED H. FULLER.