US971936A - Apparatus for the manufacture of sheets of pulp. - Google Patents

Description

D. M. SUTHERLAND da D. M. SUTHERLAND, Jn. APPARATUS F011 THE MANUFAGTURB 0F SHEETS or PULP. APPLICATION FILED OUT-19,1908.

971,936, Patented 001;.4, 1910.

8 SHEETS-SHEET 1.

Ik H/ if 15.',

7 jf I; l H /J I (fl F l o 6 2 tyw Q LJ, /O H HFT mmfzfim H L ,1" ,g [l 1| 1 cI o III 1| l' Il HA'II l u o a z MW www, am.. w...

D. M. SUTHERLAND & D. M. SUTHERLAND, JE. APPARATUS Hm THB MANUFAGTURE 0F SHEETS or PULP.

APPLICATION FILED OUT-19, 1908. l 971,936, Patented Oct.4, 1910.

2 SHEETS-SHEET 2.

INVENTORS WITN'ESSES S Jaw far/Md 'fmgmww UNITED STATES PATENT OFFICE.

l DANIEL MANSON SUTHERLAND AND DANIEL MANSON SUTHERLAND, JR., OF SUNBURY COMMUN, ENGLAND.

APPARATUS FOR THE MANUFACTURE OF SHEETS F PULP.

Specification of Letters Patent.

Application filed October 19, 1908.

Patented Oct. 4, 1910.

Serial No. 458,371.

To all whom it may concern:

Be it known that we, DANIEL MANsoN SU'rnnuLANn and DANIEL MANsoN SU'ri-IER- LAND, Jr., both subjects of the King of Great Britain, residing, respectively, at

Ashgrove, Sunbury Common, in the county of Middlesex, England, managing director, and St. Helens, Nursery Road, Sunbury Common aforesaid, assistant manager', have jointly invented ce1-tain new and useful Apparatus for the h/[anufactl'lre of Sheets of Pulp, rood-Pulp, or the Like, of which the following is a specification.

Thick, large sheets of paper pulp, wood pulp or the like, are made by ruiming the pulp into a mold consisting of a lower frame holding a sheet of wire gauze or the like forming the bottom of the mold, an upper frame holding a similar sheet constituting the top of the mold and a frame or separate boards constituting the sides of the mold and called a deckle. The pulp having been filled into the mold the upper frame is laid in place and pressed to expel the liquid from the pulp. The bulk of the liquid passes through the bottom of the mold, but some always passes upward through the top and before the top frame can be removed for the urpose of removing the sheet the whole mold must be tipped in order to drain away this water. The mold is then laid horizontally, the top frame and the deckle are removed and the bottom frame is turned over and allowed to fall on to the trolley or the like that is to receive the sheet in order that the latter may be detached from the wire cloth. These manipulations are laborious and occupy time and the shock of the fall damages both the frame and the sheet. In another mode of manufacturing articles from wood pulp, while pressure is applied to the mold, a vacuum is made above the top of the upper mold frame and maintained so as to cause the article to adhere to that frame when the upper and -lower frames are taken apart, then, when it is desired to detach the article, the vacuum is destroyed and the article by means of compressed air is blown off the frame on to a device locatedbelow the upper frame and adapted to remove the article from between the two frames. Now according to the present invention, while the vacuum is maintained above the top frame, this frame together with an adhering sheet of pulp is moved in a direction laterally to that of the pressure; in other words from above the lower frame, until it is exterior to the molding apparatus and is brought to a desired position, it may be over a trolley or the like, the vacuum is destroyed in order to allow the sheet to fall upon the bed by its own weight and through a distance as small as may be desired. With suitable arrangements the suction applied above the top of the mold may servo to remove the portion of liquid which, as aforesaid, is expelled upward. Preferably, the mold is placed in a press, the A lower table of which can be raised or lowered such as by hydraulic power. The upper frame of the mold is fitted to a suction box arranged to drain or suck away water and air. The upper frame together with its suction box may be mounted on wheels running on rails to permit the prepared sheet, after the lower frame has been lowered, to be conveyed to the required position over the trolley or the like. The combination of the pressure on the lower frame and suction on the upper accelerates the extraction of the liquid from the pulp and makes a better sheet, in addition to facilitating the couching of the sheet as aforesaid.

In the accompanying drawings, Figure l is a front elevation of the apparatus for applying the invention, showing the upper frame and suction box in position vertically over the lower fra-me; Fig. 2 is a similar view showing the upper frame and suction box shifted laterally from the position in Fim 1 to a position over the conveyer or trolley; and Fig. 3 is one section on the line III-III of Fig. 1, having certain parts removed.

A is the platen, and B the head of a hydraulic press P.

C is the bottom frame of the mold and D is the deckle.

E is the top frame of the mold and is at,- tached to the suction box F.

H is a main suitably connected with a suitable exhaust pump H', for 'instance by a svviveling swing pipe H2 and H3 provided with a stop cock H4.

Branch ducts on pipes L from this main extend into the suction box and from this branch other branches or ducts M extend downward to the wire gauze of the top frame.

Fig. 2 shows the suction box F, suitably mounted on wheels and adapted to be shifted laterally along rails O suitably carried by the press P and supported on supports Q, not here shown, to a place exterior to the press it may be above the trolley J where the vacuum in box F is destroyed, and the sheet G allowed to fall upon the previously made sheets K.

By suitably connecting the main H with a supply of compressed air during the period when pressure is being applied to the mold, the pressure Within the suction box may be suitably increased to revent any water from entering the box. ne way of connecting the main with the compressed air source is shown in Fig. 1 where the pump H5 is connected to the swing pipe H2 by means of pipe I-IG having a stop cock H7.

I-Iaving thus described the nature of this invention and t-he best means we know of carrying the same into practical effect, we claim l. In apparatus for the manufacture of thick large sheets of paper pulp, wood pulp or the like, the combination of a press, a lower mold part adapted to contain pulp and fitted to the press, a movable upper mold part' detached from the press normally mounted above the lower mold part and adapted to cooperate therewith, a suction box attached to the upper mold part, means for pressing said mold parts together to form a sheet, and means whereby the upper mold part, the sheet and the suction box may be moved from above the lower mold part to a position external to the press.

2. In apparatus for the manufacture of thick large sheets of paper pulp, Y:wood pulp or the like, the combination of a press, a lower mold part adapted to contain pulp and fitted to the press, a movable upper mold part detached from the press normally mounted above the lower mold part and adapted to coperate therewith, a suction box attached to the upper lmold part, a series of ducts in the suction box communieating with an exhausting device and the upper mold part, means for pressing said mold parts together to form a sheet, and means whereby the sheet and the upper mold part may be moved from above the lower mold part to a position external tothe press.

3. In apparatus for the manufacture of thick large sheets of paper pulp, wood pulp or the like the combination of a press, a lower mo-ld part adapted to contain pulp and fitted to the press, a movable upper mold part detached from the press normally mounted above the lower mold part and adapted to cooperate therewith, a suction box attached to the upper mold part, a

series of ducts in the suction box communieating with the suction box, with an exhausting device, and with a source of compressed air, means for pressing said mold parts together to form a sheet, and means for removing both the sheet from between the'said mold parts and the upper mold parts to a position external to the press.

4. In apparatus for the manufacture of thick large sheets of paper pulp, wood pulp or the like, the combination of a press, a track fixed to, located within and projecting externally and laterally of the press, a lower mold part containing pulp and fitted' to the press, an upper mold part movably mounted on the track and adapted to cooperate with the lower mold part, a suction box attached to the upper mold part, means for pressing said mold parts ltogether to form a sheet, and means for removing said sheet from between the mold parts to a position exterior to the press.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

DANIEL MANSON SUTHERLAND. DANIEL MANSON SUTHERLAND, JR.

Witnesses:

JOSEPH VILLARD, WV. I. SKERTEN

Images