US1211739A

US1211739A - Suction-box.

Info

Publication number: US1211739A
Application number: US1947715A
Authority: US
Inventors: Charles Edward Miser
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-04-06
Filing date: 1915-04-06
Publication date: 1917-01-09
Anticipated expiration: 1934-01-09

Description

C. E. MISER.

SUCTION BOX. APPLICATION FILED APR. 6. 1915.

1,21 1,739. Patented Jan. 9, 1917.

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SUCTION-BOX.

' Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed April 6, 1915. Serial No. 19,477.

To all whom it may concern:

Be it known that 1, CHARLES E. MISER, a citizen of the United States, and resident of VVatertown, in the county of Jefferson in the ,State of New York, have invented new and useful Improvements in Suction- Boxes, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in suction boxes for paper machines, and is adapted to be used in connection with a traveling foraminous pulp conveyer for extracting moisture from the pulp while in transit across the mouth of the suction box. This foraminous carrier for the wet pulp is usually made of screen wire of relatively fine mesh, and in passing over the suction box is drawn with greater or less pressure, according to the degree of suction against the contiguous face of such box, so that unless suitable means is provided for reducing friction, the screen carrier or conveyer soon becomes mutilated by wear to such an extent as to render it unfit for further use.

One of the main objects of my present invention is to obviate this excessive wear by providing the suction box with an endless foraminous apron, traveling in the same direction and at the same rate of speed as that of the carrier and in contact therewith throughout the entire area of the adjacent side of the suction box.

Another object is to make the foraminous apron of the suction box of resilient substance, such as rubber canvas belting or equivalent yielding material, so as to establish greater uniformity of pressure throughout the contacting area between the carrier and apron, and at the same time affording a cushioned support for the carrier to reduc the liability of relative slipping of the contoacting. parts, one upon the other, and there- A further object is to inclose the entire apron (except the portion thereof which is in direct contact with the carrier) within a substantially air-tight housing, constituting the suction box proper, from'which the air and water may be drawn by any suitable suction device.

A still further objectis to provide simple means whereby the apron. may be kept under the desired tension at all times while the machine is in operation or at rest, without removing any of the parts.

reducing the liability of excessive wear.

Other objects anduses relating to specific parts of the apparatus will be brought out in the following description.

In the drawings Figure 1 is an end view, partly in section, of my improved suction box and a portion of the foraminous pulp carrier, together with two of its supporting rollers at opposite sides of the box. Fig.2 is a longitudinal vertical sectional View, partly broken away, of the same suction box, taken on line 2-2, Fig. 1. Figs. 3 and 4 are sectional views taken respectlvely in the planes of line 33, Fig. 1, and M, Fig. 2.

This suction box is adapted to be used in connection with the horizontally traveling portion of a foraminous pulp carrier 1, and comprises a stationary suction box 2 preferably of substantially triangular cross section and containing therein an endless foraminous belt or apron -3 of rubber canvas belting or equivalent resilient material, carried by a series of, in this instance three, rollers 4 and 5 located at the angles of the triangular box 2 and prefe'rably journaled in suitable bearings -6 and -7- in or upon the end walls of the box 2.

This suction box is of greater length than the transverse width of the carrier -1, as will be clearly apparent upon reference to Fig. 2, and extends transversely thereof, preferably at right angles thereto and in a plane below the same, with its apex at the bottom and its upper side open and disposed in a substantially horizontal position parallel with and in close juxtaposition to the underside of the pulp carrier -1-, said box being provided in its lower side or apex, near one end, with an outlet pipe 8 adapted to be connected to any suitable vacuum pump or equivalent suction device not necessary to herein illustrate or describe.

The sides and bottom of the box -2-' are preferably integral and are provided at their ends with outwardly projecting flanges to which are bolted the opposite ends as 9, to form air-tight joints therewith, said ends being co-extensive with the transverse area of the box and extend upwardly slightly above the horizontal upper portion of the apron e, with their upper inner edges in close juxtaposition to the corresponding edges of the apron and foraminous belt to form reasonably tight joints therewith, these joints being more effectively closed when the machine is action, by

The apron ,-3 is of substantially the same width as the carrier l and is supported upon the peripheries of the rollers -4 and -5 so that its sides travel in close proximity to the inner faces of the corresponding sides of the stationary box 2, while its upper side is supported in close proximity to the underside of the carrier 1- and is caused to travel in the same direction and at the same speed as that of the carrier, the rollers 5 being spaced some distance apart so as to correspondingly broaden the area of contact between the up per portion of the apron 3 and carrier This upper side of the apron -3- constitutes the corresponding side of the box, the upper edges of the opposite sldes of the latter being disposed in close proximity to the underside of the carrier, and are provided with flexible packing strips -11 deflected inwardly close to the adjacent portions of the apron -3- from end to end thereof to effectively close the open joint between the upper edges of the opposite sides of the stationary box -2 and apron so as to increase the degree of suction in the box. This apron is perforated throughout its area with relatively small holes arranged as close together as possible Without weakening the fabric, so as to allow the water to be withdrawn from the pulp through the upper portion thereof while traveling acrpss the mouth of the suction box, during which action the adjacent portion of the highly flexible screen wire carrier 1 is drawn tightly against the upper side of the apron which, on account of its resiliency, permits a closer contact of the adjacent portion of the carrier throughout its contacting area than would be possible if the apron were made of metal, this close contact also serving to prevent relative slipping of the contacting'parts, one upon the other, and thereby reducing the wear of both parts to a mini mum.v

The carrier 1 is supported at inter vals by suitable rollers 12, two of which are preferably located in close proximity to the front and rear sides of the suction box, leaving the intervening portion free to yield for contact with the adjacent portion of the traveling apron.

The bearings 6 and roller icarried thereby are adjustable radially or toward and from the rollers 5, and for this purpose the openings, as -13-, in the end walls 9- through which the ends of the roller -4- project. are elongated vertically, while the hearings --6- are also provided sirniiarly elongated bolt openings lifor receiving clamping bolts 15 by which these bearings are secured to the adjacent outer faces of the ends 9. The means for adjusting the bearings 6- and holding them in their adjusted position consists of screws -16 engaging in threaded apertures in the upper offset portions of the ends 9, as shown more clearly in Fig. 2, the lower ends of said screws being engaged with the upper edges of the bearings 6 and areprovided with angular heads 17- adaptedto be engaged by a wrench or other turning device for adjusting them, the object of such adjustment being to keep the apron reason ably tight. For a similar purpose the bearlngs -7 and'rollers 5 carried thereby are also adjustable vertically by means of hand screws +18 which are engaged in internally threaded glands 19 in the upper offset portions of the end heads 9, as'shown more clearly in Fig. 3, inwhich the bearings 7 are provided with down wardly projecting bosses 20 guided in vertical sockets 21 and engaged by the upper ends of the screws 18. This latter adjustment of the bearings 7 and rollers -5 also serves to .bring the upper side of the apron 3 into proper relation to the underside of the carrier so as to contact therewith throughout its area.

The supporting shaft for one of the rollers, as 4, extends through a stufling box or gland 22' in one of the bearings 6 and is provided with a gear -23 adapted to connected to any suitable driving mechanism, preferably some rotary part of the machine, for rotating the roller 4 in such manner as to cause the upper side of the apron 3 to travel in the same direction and 'at the same rate of speed as the pulp carrier 1, whereby, as both belts are operated in unison, the water carried along with the pulp by the carrier --1 will be extracted by suction as it passes over the upper side of the bOX2-, the water passmg into the suction box being drawn through the drainage pipe 8 and de-- livered by the pumping device to any 10- callty desired, the operation ofseparating the water from the pulp being continuous.

What I claim is:

1. In a suction device for pulp carriers, a non-metallic foraminous traveling apron of resilient material, and a suction box inclosing substantially all but the portion thereof which contacts with the pulp carrier.

2. In combination with a traveling foraminous pulp carrier, a stationary suction box having an open side adjacent the underside of the carrier, and an endless traveling foraminous apron within said box and having a portion thereof movable across the open upper side thereof in contact with the underside of the carrier.

3. In cots", nation with a traveling forumlnous pulp carrier, a stationary suction box havlng an open sideadjacent the underside of the carrier, and anendless traveling foram1nous apron within said box and havmg a portion thereof movable across the open upper side thereof in contact with the underside of the carrier, and supporting rollers for said apron adjustable to tension the same.

4. In combination with a traveling forammous pulp carrier, a stationary suction box having an open side adjacent the underside of the carrier, and an endless traveling foramlnous apron within said box and having a portion thereof movable across the open upper side thereof in contact with the underside of the'carrier, and means for adjusting the upper portion of the apron relatively to the carrier.

5. In combination with a traveling forammous pulp carrier, a stationary suction box having one side adjacent the carrier open but otherwise substantially air-tight, and an endless traveling foraminous apron covering the open side of the box'in contact with the carrier and otherwise wholly within said box.

6. In combination with a traveling foraminous pulp carrier; a suction device comrising a suction box having one side adacent the pulp carrier open, a ."foraminous apron within the box and movable across its open side, supporting rollers for the apron, and means on the exterior of the box for adjusting the rollers.

In witness whereof I have hereunto set 1 my hand this 1st day of April, 1915.

CHARLES EDWARD MISER.

Witnesses:

LOUIS DE L. .BERG, MARY H. Mrsmz.