US942925A - Machine for saving waste pulp. - Google Patents

Description

E. F. PARKER.

MACHINE FOB. SAVING WASTE PULP.

APPLICATION FILED APR. 26, 1909 942,925. Patented Dec. 14, 1909 5'. W. ZMJVZL KWQQM *tmi EDWARD F. PARKER, OF FAIRFIELD, MAINE.

MACHINE FOR SAVING WASTE PULP.

Specification of Letters Patent.

Application filed April 26, 1909. Serial No. 492,852.

To all whom it may concern:

Be it known that I, EDWARD F. PARKER, a citizen of the United States of America, and a resident of Fairfield, in the county of Somerset, State of Maine, have invented certain new and useful Improvements in Machines for Saving Waste Pulp, of which the following is a specification.

My invention relates to a device for saving waste pulp such as is used in pulp and paper mills and known in the trade as a save-all These devices are used for collecting the small particles of pulp which escape in the waste water from the wet machines, dry machines and paper machines as well as what passes off with the spent liquor and from other sources.

The waste pulp is in the form of fine particles or fibers suspended in a relatively great bulk of water and the pulp is collected in small wet machines having their cylinders covered with very fine wire gauze whereby substantially all the fibers are caught and taken off onto the couch roll. The defect of these machines as they have heretofore been made was that while the small particles of pulp could be easily collected on the couch roll it was very difficult to remove it from the couch roll because the amount of pulp on the couch at any one time was not sufficient to form a web of paper which could be taken off in. the ordinary way and it could not be successfully scraped off by means of ordinary scrapers.

The object of my invention is to construct a machine of this type in which the fine particles of pulp may be readily removed from the couch roll or other collecting member. This I accomplish by providing a concentrating member preferably in the form of a flexible apron which rubs against the surface of the collecting member and by which the small particles are rolled together and gathered into bunches which increase in size until they are large enough to drop off and be collected.

For the purpose of illustration I have shown in the accompanying drawing a wet machine provided with my invention in the general form in which I prefer to use it but it is to be understood that it may be constructed in a great variety of ways.

In the drawing, Figure 1 is an end elevation of av wet machine with my special parts applied to it. Fig. 2 is a plan of the same.

Figs. 8 and 4 show modified forms of the apron or rubbing member.

In order to apply my invention the pulp in small detached particles is first collected on some form of stationary or movable collecting device as the couch roll of a wet machine such as herein shown.

Considering Figs. 1 and 2, A is the tank of a wet machine, a the feed spout, a the waste water duct, B the cylinder, 6 the cyl inder driving pulley and C the couch roll, these parts being constructed in the well known manner of wet machines such as are used in paper and pulp mills for the collection of pulp from the water in which it is suspended. To remove the particles of pulp from the couch roll, I provide a concentrating member which rubs against its surface preferably conforming to the surface so as to have considerable contact therewith. As shown in Figs. 1 and 2, I make use of an apron of some suitable flexible material as coarsely woven woolen or cotton fabric, rubher. or felt and so held as to rub or draw.

along the surface of the roll as the latter revolves. The apron is represented at D and it is confined by its front edge between two clamping bars d and (5 supported on the brackets (Z secured to the uprights which carry the ournal bearings of the couch roll. The apron D extends over the couch roll to the rear side thereof where its rear edge is secured to a tightening device here shown as a roll 6 by which it is held taut in contact with the couch roll. The roll 6 is mounted on a shaft 0 which is journaled in brackets e secured to the uprights 0 Means are provided for maintaining any desired tension on the apron and for this purpose I secure on one end of the shaft 0 a pulley f having a cord 7 secured to its periphery said cord passing over a pulley f and having suspended at its end a weight f which may be varied according to the amountof tension desired. The bunches of pulp as they fall from the couch roll where the apron ends its contact are deflected and directed to a suitable receptacle not here shown. I show here for that purpose a roll 9 journaled beneath the roll 6 and adapted to run in contact with the couch roll but at a greater speed. The roll 9 is journaled in sliding bearings g the position of which may be adjusted horizontally by means of an adjusting screw g journalccl in fixed up- Patented Dec. 14, 1909.

. rights A hand wheel 9 is provided for turning the screw g and by turning this hand Wheel the roll may be moved toward or from the couch roll and the contact between the two be accurately regulated. The roll 9 is rotated by a pulley 0 which is belted to a pulley 0 on the end of the shaft of the couch roll. The function of the roll g is to clean off any waste pulp which may stick to the couch after leaving the apron and to throw all the bunches of pulp as they fall from the couch onto the deflecting plate h which is so placed as to guide the saved pulp away from the machine and into a suitable receptacle. For the purpose of making the roll effective I secure to its surface strips of felt g or other fibrous material which act to keep the couch roll clear.

From what has been said the operation of the machine will be readily understood. The particles of pulp are first collected on the surface of the cylinder and transferred thence to the couch roll. As the particles come under the apron they are rolled up into small rolls or bunches gathering more fibers as they roll until when they reach the rear end of the apron they have attained considerable size varying in ordinary practice from 1/8 to 3/8 inches in diameter and from'2 to 8 inches in length. In this condition they fall readily from the couch roll when they leave the apron and being caught on the surface of the roll 9 are thrown back falling on the deflecting plate 72, and thence into the receptacle provided for them. The pulp as thus formed has a large part of the water taken out, it may be readily handled in a variety of ways and it beats up readily in the regular beating engines.

It is evident that various devices may be used as a substitute for the flexible apron above described, any device which can be made to rub over the surface of the couch or other collecting member being effective to produce the rolling effect of the fibers whereby they are aggregated to form rolls or bunches.

In Fig. 3, I show a rigid rubbing member j pivoted at j and bearlng against the surface of the couch roll 2' and in Fig. 4: I show a flexible apron made up of rigid strips 11% secured together by a flexible connection a and held at a. In each of these cases the rolling effect will be produced on the fiber but the best results will be attained with an apron such as described which is flexible in all directions so that the formation of a relatively large bunch will not lift the apron out of contact with the roll but will allow it to hug the roll closely at all times. The rubbing effect may be produced by one fixed roll resting on a movable roll but it is better to have the surfaces contact for a considerable distance so as to give the bunch of fibers time to grow to suitable size by constant accretions of fibrous particles and it is evident that the larger the couch and the longer the contact surface which the apron makes with the roll, the larger will be the rolls of pulp as they fall off.

I claim:

1. In a machine for saving waste pulp the combination of a collecting member, adapted to collect the pulp in small particles on its surface, a yielding concentrating member having a flat face adapted to drag across the surface of the collecting member to gather the particles into bunches.

2. In a machine for saving waste pulp the combination of a movable collecting member adapted to collect the pulp in small particles on its surface, a yielding concentrating member having a flat face adapted to drag across the surface of the collecting member.

3. In a machine for saving waste pulp, the combination of a movable collecting member adapted to collect the pulp in small particles on its surface, a fixed and yielding concentrating member having a flat face adapted to drag across the surface of the collecting member.

4. In a machine for saving waste pulp,the combination of a roll adapted to pick up the pulp in small particles and a yielding concentrating member having a flat face adapted to drag across the surface of the roll to concentrate .the particles.

5. In a machine for saving waste pulp, the combination of couch roll and a yielding concentrating member having a fiat face cooperating with the couch roll and adapted to drag across its surface.

6. In a machine for saving waste pulp the combination of a roll for collecting the pulp in small particles on its surface and a flexible concentrating member having a flat face and adapted to drag across the surface of said roll.

7. In a machine for saving waste pulp, the combination of a roll for collecting the Julp in small particles on its surface and a exible apron held in contact with the surface of said roll.

8. In a wet machine for saving waste pulp, the combination with the couch roll of a flexible apron held in contact with the surface of said roll.

9. In a wet machine for saving waste pulp the combination with the couch roll of an apron of flexible material secured on the front side of the roll and resting on and extending over to the rear side of said roll.

10. In a wet machine for saving waste pulp, the combination with the couch roll of an apron of flexible material secured on the front side of the roll and resting on and extending over the roll and means for drawing said apron taut against the surface of the roll.

11. In a Wet machine for saving Waste pulp, the combination With the couch roll of an apron of flexible material secured on the front side of the roll and resting 011 and extending over the roll and a tightening roll to Which the rear portion of said apron is secured for drawing the same taut over the roll.

12. In a Wet machine for saving Waste pulp, the combination With the couch roll of an apron of flexible material secured on the front side of the roll and resting on and extending over the roll, a tightening roll to Which the rear portion of said apron is secured for drawing the same taut over the roll and a tension device on said tightening roll.

13. In a Wet machine for saving Waste pulp the combination with the couch roll of a flexible apron resting on said couch roll and a cleaning roll beneath the rear end of said apron running in contact With the couch roll.

1%. In a machine for saving Waste pulp, the combination of a movable collecting member adapted to collect the pulp in small particles on its surface, a yielding concentrating member having a flat face adapted to contact With the collecting member, said face and the approaching surface of the collecting member forming an acute angle.

In Witness whereof I have hereunto set my hand this 23d day of April, 1909.

EDIVARD F. PARKER.

Witnesses HENRY D. BnoPHY, IV. C. SIMPsoN.

Images