US1660917A - Rope-guiding bracket for paper-making machines - Google Patents

Description

Feb. 28, 1928.

I R. CARPENTER ROPE GUIDING BRACKET FOR PAPER MAKING MACHINES Filed Aug. 26. 1927 2 Sheets-Sheet 1 rag-a.

- R0556 Canben/ec Feb. 28, 1928.

R. CARPENTER ROPE GUIDING BRACKET FOR PAPER MAKING MACHINES Filed Aug. 26. 1927 2 Sheets-Sheet 2 RUsse/(Carpea/er;

Patented Feb. 28, 1 928.

OFFICE RUSSELL CARPENTER, or THREE RIVERSAUEBEC, CANADA.

ROPE-GUIDING BRACKET non PAPER-MAKING MACHINES.

Application filed Auguizt 26, 1927. Serial No. 215,666.

This invention has been developed primarily for use in connection with thedryer apparatus of high speed paper making ma chines. a

This dryer apparatus comprises a battery of cylindrical dryer rolls around which the' paper is passed for drying purposes during the manufacturing operation and as the structure of the apparatus is well-known in the art only those partswhich relate to the present invention will be described in detail. The paper travels through this drying apparatus at a very high speed consequently ropes are provided for facilitating the initial feed or travel therethrough, such ropes being looped successively around the dryer rolls and running in grooves therein adjacent the front of the machine.

- Heretofore these ropes have been a source of constant trouble and expense owing to.

their tendency to hump from the grooves and become entangled with the vmachine frame, cylinder heads and associated parts. Breakages are the inevitable result and when such breakage occurs it is usually two or three hours before the machine can be set in operation again. a I a Many attempts have been made in the past to solve the problem but as far as I am aware few have been successful.

The nearest approach to a satisfactory solution I believe may be found in the Bellemare bracket in which a series of brackets are utilized to eliminate as far as possible the danger of breakage of the ropes in the event of their displacement from the dr er rolls. Experience has shown, however,t lat while this arrangement has obtained a fair measure of success the possibility of breakage. is not entirely overcome owing to the difiiculty of maintaining the ropes sufficiently taut to prevent entanglements and come quent breakages when they jump from the.

rolls.

Furthermore in the eventof breakage of the paper during its travel through the rolls it is not possible, while the rolls are in motion, to pull out the scrap that has accumulated without considerablerisk of displacement and consequent breakage of the ropes. In fact most paper manufacturers insist upon stoppageof the machine before any attempt is made to remove the accumu lated paper and as it takes some, minutes tion again it is obvious that serious losses in the machines out-put are the result.

The present invention, therefore, seeks to make a further advance in the art by providing means which not only will retain the ropes within their grooves under all condi- ,tions but which in addition will permit of the rolls being freed of all loose scrap while the machine is operating at full speed without danger of displacement.

To this end the invention consists of specially designed brackets located in fixed position adjacent the grooves in the dryer rolls at the pointsof entry of the ropes thereinto.

For full comprehension of the invention reference should be had to the accompanying drawings in which the same reference characters indicate the same parts inall the views. 1

Figure 1 is a diagrammatic frontview of a portion of the dryer apparatus of a paper making machine showing my invention applied thereto;

Figure 2 is a side elevationthereof;

Figure 3 is a side elevation of one of the brackets drawn to a larger scale;

Figure 4 is an underside view thereof;

Figure 5. is an end view thereof;

Figure 6 is a sectional view taken on line 6-6 Figure 4.

Figure 7 is a bracket;

Figure 8 is a side elevation of a modified form of bracket; a v

Figure 9 is a sectional view taken on line 9-9 Figure 8;

Figure 10 is a side elevation of another modified form of bracket;

Figure 11 is a sectional view on line 11-11 Fi ure 10;

perspective view of the igure 12 a detail view of the bracket point at which a lateral 'displacement of to stop the machine and also to set it in mo- 1 the ropeshas the greatest tendency to cause them to jump from or run out of the grooves takes place at or adjacent to that point at which they first engage or run onto each roll, the slightest pressure at these points against the ropes towards the front of the machine such as sometimes occurs when the paper breaks and accumulates between the rolls or when an operator attempts to pull out the loose scrap ahnost instantaneously whipping the ropes off the entire series with the usual disastrous results. The present invention, therefore. seeks to provide means which will positively prevent sufficient displacement at these points to permit such an eventuality to take place.

To this end I mount in fixed position upon the machine frame 5 abracket or guard 6 at or adjacent to the point of entry of the ropes into the groove in each dryer roll or in other words at a point alongside the tangentially disposed portion 4" of the ropes which extends from one roll to another. This arrangement is clearly indicated in Figure 1. Each of these brackets consists of a unitary plate member of tapered form in plan view having oppositely curved inturned longitudinal side edges 7 and 8 re spectively presenting a trough-like or channel cross section, the plate being carved outwardly from end to end in longitudinal section as indicated at 9 to provide a channel which gradually increases in depth from the end of thebracket nearer the point of entry of the ropes into the groove to the opposite end. This gradual increase in depth provides a comparatively deep mouth which permits a limited lateral displacement of the ropes in an outward direction such as might result from an accumulation of the paper when breakage takes place and at the same 7 time prevents suiiicient movement inthis direction to cause the ropes to be whipped out of or displaced from their groove in the dryer roll. The bracket may be supported in position by any preferred means, that being indicated consisting of a metal strap 10 of substantially Z form the opposite ends of which are respectively secured to the machine frame and'to lugs 11 011 the back of the bracket.

In view of the end play which takes place in all dryer rolls in machines of this type it is imperative that the bracket be so construct-ed and arranged that it will allow the dryer roll perfect freedom in this respect while efiiciently performing its function. To this end the side flange 8 of the bracket is curved concentrically to the center of the roll so that it conforms snugly with the periphery of the latter and when the bracket is mounted in position this side flange is disposed in close proximity to that portion of the periphery of the roll between the groove tlierein and the adjacent end thereof, This arrangement overcomes the dryer roll.

difficulty experienced in the pastin providing perfect end play freedom of the roll without leaving a. space sufficient to permit the ropes to escape through.

The bracket hereinbefore described has proved its ability to meet the requirements for which it is designed but it is to be distinctly understood that I do not limit myself to its specific shape because it is believed that variations in this respect can be made without departing from the spirit and scope of the invention.

For instance in Figures 8 and the bracket in the main is constructed of U crosssection and is provided at one end with an extension having a surface which is inclined inwardly to the edge of the groove in the In Figures 11 to 13 inclusive the-bracket consists of a member of channel form extending across the intervening space between the adjacent dryer rolls and having its ends curved to conform to the peripheries thereof in like manner to that of the bracket shown in Figures 8 and 9. Various other modifications may be made with equally advantageous results.

In using brackets of the type shown in the modified instructions it is preferable to hinge them upon the-machine frame so that they may be swung to position clear ofthe ropes when it is desired to replace the latter.

\Vhat I claim is as follows: 7

1. In a machine of the type described, the combination with a rotary dryer roll having a grooved periphery and ropes arranged to run within said groove, of means preventing displacement of the ropes from the groove said means consisting of a guidebracket separate and distinct from the dryer roll and located in fixed position alongside the ropes adjacent their point of entry into the said groove, said bracket being constructed and arranged to prevent the ropes from being displaced laterally in an outward direction to a sufficient extent to permit their dis placement from said groove.

2. In a machine of the type described, the combination with a rotary dryer roll having a grooved periphery and ropes arranged to travel within said groove, of means separate and distinct from the dryer roll and located in fixed position alongside the ropes adjacent their point of entry into said groove, said means consisting of a bracket substantially of channel-form constructed and arranged to prevent displacement of the ropes from the groove.

3. In a machine of the type described the combination with a rotary dryer roll having a grooved periphery and ropes arranged to run within said groove, of means located in lac combination with a rotary dryer roll having a grooved periphery and ropes arranged to run within said groove, of means located in fixed posit-ion alongside the ropes adjacent their point of entry into said groove and constructed and arranged to preventtheir displacement therefrom said means consisting of a unitary bracket constituted by a plate of tapered form in plan view having oppositely curved inturnedlongitudinal side edges said plate being cuved outwardly in longitudinal section, such bracket being arranged with one of its longitudinal side.

edges conforming with and located in close proximity to the periphery ofthe roll alongside the groove therein, substantially as described.

5. In a machine of the type described, the combination with a rotary dryerroll having a grooved periphery and ropes arranged to run Within said groove, of extraneous means located in fixed position alongside the ropes adjacent their point of entry into the groove and constructed and arranged to prevent their displacement therefrom, said means conforming with and located in close prox imity to the periphery of the roll alongside the groove therein, substantially as described. 1

Signed at the city of Three Rivers, Quebec, this twenty-second day of August, 1927.

I RUSSELL CARPENTER.

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