US1541928A - Broke remover for paper machines - Google Patents

Description

June 16, 1925.

T. E. DURHAM BROKE REMOVER FOR PAPER MACHINES Filed April 30 1924 2 Sheets-Sheet 1 June 16, 1925.

T. E. DURHAM BROKE REMOVER FOR PAPER MACHINES Filed April 30 924 2 Sheets-Sheet 2 described in detail.

Patented June 16, 19225.

- UNITED. si'r mg PATENT FFIQE.

THOMPSGN E; DURHAM, 033 SA'EY'L'I STE. MARIE, CANADA.

" FOR IAPER MACHINES.

Application: filed April 30, 1924-. Serial No. 710,136.

To, all whomit 91mg, concern: I Be it known that I, THOBE'PSON E. Dun- HAM, of Sault Ste. Marie, in the district of Algonia, Canada, a subject of the King of Great Britain, have invented certain new. and useful. Improvements in Broke Removers for Paper Machines, of which the following is a specification. v

This invention relates to paper making machines in which the paper after passing from the endless wire belt, commonly known as the wire )asses on to felt belts and 1S tends to encircle the upper press roll and is thrown about the room.

The object of the present invention is to provide means which may be thrown into operation at a moments notice to automatlcally removethe broken paper stock from the press roll and feed it away to one side to a suitable tank. For this purpose I provide the mechanism shown in the ac-,

companying drawings in which Fig. 1 is a side elevation of part of the paper machine provided with my improvements; 1

F ig. 2 a sectional elevation, partlybroken away; V

F'g. 3 a plan view of the doctor and conveyor mechanism; and

Fig. l a cross sectionaldetail of the doc tor and conveyor.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

The machine being of ordinary construction, provided with the usual driving mechanism, felt belts and press rolls, need not be The upper press roll of a pair is indicated at 1, and 6 is the felt belt passing between the rolls. Adjacent the top of the upper press roll is a trough 3, which is materially longer than the press roll and extends past each end thereof. I11 this trough islocated a helical conveyor 1, which is preferably increased in pitch towards the discharge end... Supported from the trough is a doctor or scraper, which. ex.- tends close'upto theperiphery of; the press roll 1.. Thisdoctor is preferably formed by cuttingout apart 20f the wall ofthe trough 3: and bending it down towardsthe press roll, and by; securing thereto a wooden scraper blade 7 with a bevelled frontedge,

the. upper surface of the scraper being-sub stan-tially tangential to theperiphery of the roll. The wet half-made paper encircling the press roll is scraped off by the doctor and passes into the trough 3, along which it is conveyed by the COID'GYOP 4 and deposited in the broke tank 5. The increase in the pitch of the helical conveyor towards the discharge end gives it an increased conveying capacity which enables it to take care of the increasing load towards the delivery end. Sprocket gearing is provided whereby the conveyor may be driven from any suitable shaft. I show for this purpose a sprocket wheel 9 on the conveyor shaft 10 driven by a sprocket chain 11 from the shaft 12 of the lower press roll. The control is by means of a clutch 13 provided with a shifter 14 which is arranged to be operated from any convenient point, when trouble occurs, by means of a sliding rod 15.

The device will be applied in connection with each pair of press rolls, if more than one pair is employed in the machine.

The instant trouble occurs resulting in the breaking of the web of paper, the operator pulls in the clutch 13 which starts the conveyor 10 in operation to carry away the broke, scraped off by the doctor. As the latter is always in position for use, any slight delay in starting the conveyor is immaterial.

What I claim is 1. The combination with a paper machine provided with press rolls of a doctor extending into close proximity to the periphery of the upper press roll; a transverse trough behind the doctor adapted to receive the broke; and a helical conveyor located in said trough, the pitch of the conveyor increasing towards the discharge end.

2. The combination with a paper machine provided with press rolls of a transverse trough located behind the top of the upper press roll and having an opening in its front wall substantially the width of the upper press roll; a doctor extending into close proximity to the upper press roll, said doctor ill comprising a scraper and a supporting member, to which the scraper is secured, connected with the trough along the lower edge of the opening in the front of the trough; and a transverse conveyor operating in said trough.

3. The combination with a paper machine provided with press rolls of a transverse trough located behind the top of the upper press roll and having an opening in its front wall substantially the width of the upper press roll; a doctor extending substantially tangentially into close proximity to the upper press roll, said doctor comprising a scraper and a supporting member, to Which the scraper is secured connecting with the trough along the lower edge of the opening in the front wall of the trough; and a trans verse conveyor operating 1n sald trough.

4-. The combination with a paper machine provided with press rolls of a transverse trough located behind the top of the upper press roll, said trough being longer than the press roll and extending past the ends thereof at each side and having an opening in its front substantially the width of the upper press roll; a doctor extending into close proximity to the upper press roll connected with the trough along the lower edge of the opening; and a transverse conveyor operating in said trough.

Signed at Sault Ste. Marie, Ont, this 11 day of April, 1924.

THOMPSON E. DURHAM.

lVitnesses T. A. JoHNsoN, 1). P. REID.

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