US1868310A

US1868310A - Web tension device

Info

Publication number: US1868310A
Application number: US440230A
Authority: US
Inventors: Allan J Cline
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-31
Filing date: 1930-03-31
Publication date: 1932-07-19
Anticipated expiration: 1949-07-19

Description

y 155, 1932- A. J. CLINE 1,868,310

WEB TENSION DEVICE Filed March 31, 19150 2 Sheets-Sheet 1 I IIIIIIIII/l/ July 19, 1932. A. J. CLINE 1,868,310

' WEB TENSION DEVICE I Filed March 31, 1930 2. Sheets-Sheet 2 llllllllnl h l I llZ/f Mm! MW 77 76 I Patented July 19,

ALLAN J. GLINE, OF CHICAGO, ILLINOIS WEB TENSION DEVICE Application filed. March 31, 1930. Serial No. 440,230.

This invention relates to web tension apparatus for controlling the rotation of web rolls such, for example, as the paper rolls used to supply printing presses, such rolls being ordinarily supported by roll stands or reels located underneath the presses, as in the basement or on a lower floor of the printing plant.

Tension mechanism of this general character to which my invention is particularlyadaptable is shown in Scott Patent No. 1,610,- 713, it being an object of the invention to provide means whereby tension mechanism, such as is shown in this patent, may be adjusted and the tension thereby controlled from a remote point, as from a pressroom control station, whereby the pressmen may vary the tension on the web from time to time, in ac cordance with changing conditions, without the necessit of calling down to the roll tenders in the asement orotherwise signalling for an adjustment of the tension. 7

The invention is also applicable to tension mechanism such as that shown in my pending application, Serial No. 389,363 and other adaptations of it will be readily apparent.

Referring to the drawings:

Fig.1 is a side elevation of a roll stand equipped with tension mechanism in which my lnvention is embodied, one of the pedestals of the roll stand being removed and the printing machine being diagrammatical- 1y illustrated;

Fig. 2 is a side elevation of the movable collar and associated parts by which the brake mechanism is actuated and Fig. 3 is an elevationaland sectional view showing the device of the invention applied to the tension mechanism shown in my copending application above mentioned.

In the embodiment of the invention shown in Fig. 1, thereference character 11 indicates a press unit (shown diagrammatically) adapted to be supplied with paper from web rolls 12 supported in the basement or upon a sub-level, said rolls being carried by a roll stand comprising spaced pedestals 13 in the upper ends of which is journaled a shaft 14 which carrie two'spiders 15 located at the opposite ends thereof and provided with spindles '16 adapted to support the rolls 12, this part of the construction being well known in the art. The web 17, which is shown in two positions to indicate the full and depleted condition of the roll passes over a floating or spring roller 18, thence downwardly around a compensating roller 19 from which it is directed upwardly through the pressroom floor 21 and over a guide roller 22 forming a part of the press mechanism. The roller 18 is mounted in a bracket 23 and is normally urged upwardly by means of a spring 24 mounted on a rod 25 connected with a bearing block 26 in which the end of theroller is carried, it being understood that GI this mechanism is duplicated at the opposite end of the roller so that the latter will be properly balanced. The mounting of the roller 19 will be later described.

.The shaft 14, carrying the spiders 15'between which the rolls are supported, is adapted' to be rotated in any suitablemanner as by thereon, said straps thus serving as brakes, .which, as will presently appear, may be automatically tightened when the web is slack and loosened when it is taut.

The toggles 33 are each provided with a rod 34 extending inwardly toward the shaft 14, being supported in brackets 35 on the spiders 15. Said rod 34 is equipped at its inner end with a screw 36 adapted to engage a cam surface 37 on a'collar 38 slidably mounted upon the shaft '14, said collar being held against rotation by means of a pin 39 which is adapted to extend into a socket in the pedestal 13. Said collar 38 is provided with a groove 41 in which there is disposed a yoke 42 connected by means of'a link 43 with a rod 44 extending upwardly and connected at its upper end with a lever 45 which is pivoted at 46 to a frame bracket 47. Said lever extends beyond the pivot 46 and the opposite end 48 thereof is connected by means of a spring 49 witha fixed part on the frame, the upper part of said spring and its connection to the frame being omitted for convenience in illustration. l The roller 19, previously mentioned, is carried by arms 51 mounted upon a shaft 52, said arms being extended beyond said shaft and the'opposite ends 53 thereof being connected by means of a rod 54 to a dashpot 55 which serves to steady the roller 19 and to 2o ver 45 and, by means of the rod 44, to the oke42 which actuates the collar 38 therey actuating the toggle to the

brake

29, 31 on the active roll i. e., the roll now shown at the right in Fig. 1. It will be evident that when the roller 19 is raised by reason of in creased tension on the web, due to increased speedof the press or to other causes, the rod 44 willbe lowered, causin the collar 38 tobe just the weig moved to the left viewing ig. 2, thereby loosening the

straps

29 and 31 on the friction wheel 28 and when the roller 19 is permitted to lower by reason of slack in the web the eflt'ect upon the brake will be the opposite to that just described causing the

straps

29 and 31 to be tightened upon the friction wheel 28 thereby slowing down the roll.

A threaded rod 58 is supported on the shaft 52 and extends in op oslte direction to the arms 51, said rod 58 eing provided with a counterweight 59 which, in accordance with the present invention, consists of a small" motor which is adapted to be moved along said rod 58 b 'ts own power to thereby adaccording to changing conditionsin the o eration of the press, said motor being sub ect to control by the pressmen on the floor above by means of a reversing switch diagrammatically illustrated at 61. Said switch is connected to an electric line, the opposite sides of which are indicated by the reference numerals 62 'and 63,.

and may be of any standard type whereby the di'rectionof flow of the current through the motor may be reversed. at will, said switch being connected with the motor by suitable wirmg contained in a cable 64. The

f details of the mounting of the motor 59 are best shown in Fig. 3, from which it will be noted that the motor shell is suspended from a bracket 64 carried upon a hub part 65 of a gear 66 which meshes with a pinion 67 on the armature shaft, saidhub portion 65 being threaded upon the rod 58 so that rotation of said gear 66 moves the entire assembly lengthwise of the rod. By thus providing for the control of the counterweight from the pressroom floor, the tension on the roll may be varied at will by the pressmen who are in best position to udge the needs for change in the tautness of the web'and it is rendered unnecessary for the -pressmen to call to, or otherwise communicate with; the men in the basement when a tension change is desired.

The same adjusting means may be applied to a tension device of the type shown. in my prior application, Serial No. 389,363, hereinabove mentioned, this adaptation of the invention being'illustrated in Fig. 3. In said figure a tenslon strap 68 is shown as secured at its lower end to a spring bolt 69 mounted in an angle member 71 permanently attached to the floor, said strap extending from said bolt around a roller 7 2,.thence upwardly in contact with the surface of the roll '(which is shown as full in the dotted lineposition and as artially depleted in the solid line, position? the upper end of the strapbeing connected to an arm 73 carried by a roller 74 which is movably mounted in a bracket 75 which is permanentlyattached to the under side of the pressroom floor or to a fixed frame structure. There are ordinarilyin practice several of the straps 68 spaced across the J length of the roll and it w1ll be understood that they are similarly anchored and secured to the floating roller 74. The web 17 passes over said roller 74, thence downwardly to the rod 58 as shown in Fig. 1, and having mounted thereon as a counterweight the motor and gear assembly previously described. It will be evident that the tension on the web may be increased by moving said motor outwardly on the rod portion 58 and decreased by moving said assembly inwardly since such movementtends toalter the upward force of the roller 74. While the action is specifically opposite to that in the embodiment v of the invention shown in Fig. 1 in the sense that movement of the motor assembly outwardly on the rod tends to increase the tension and inward movement tends to decrease the tension, whereas the reverse action occurs with the construction shown in Fig. 1, the two embodiments are fundamentally similar in that the'movement of the motor varies the tension and may be readily controlled by operation of the reversing switch 61. In the embodiment shown in Fig. 3 the tension is to a certain extent automatically controlled in that the web when taut tends to draw the thereby controlling the tension produced by the brake mechanism upon the roll.

sion of the straps 68 on the roll and when slack develops in the web said roller 74; is

i moved upwardly by the weight 59 thus in- 5 creasing the tension, but in accordance with my invention the tension may be still further controlled to accommodate changing conditions due to such factors as changes in the temperature and humidity affecting the elasticity of the web, the tension mechanism being therefore, more eflicient and better adapted to conditions of service than with a construction in which the counterweight or other counter balance for the floating roller is fixed or subject only to manual adjustment. a

The foregoing detailed description has been given for clearness of understanding only, and no unnecessarylimitations should be understood therefrom, but the appended claims should be construed as broadly as permissible in view. of the prior art.

I claim:

1. A web tension device comprising, in combination with a roll support and'a machine to which the web is ,to be supplied; brakemechanism for controlling the roll;

, means governed by the tension of the web for operating said brake mechanism; a counterweight for regulating said brake operating means; and a remote control device for adjusting said counterweight.

2, A web tension device comprising, in combination with a roll support and a machine to which theweb is to be supplied; brake mechanism for controlling the roll; means governed by the tension of the web for operatin said brake mechanism; a movable counter alancing element for regulating said brake operating means; and a remote control device for adjusting the position of said counterbalancing element.

for operating said brake mechanism; a counterweight comprising a movably mounted motor for regulating said brake operating means; a source of current for said motor; a switch for controlling the supply of current to the motor; and means operable by the motorfor adjusting the position of the latter to vary its value as a counterweight,

4. A. web tension device comprising, in combination with a roll support and a machine to which the web is to be supplied; brake mechanism for controlling the roll; means governed b the tension of the web A for operating said hrake mechanism; a counterweight comprising a movably mounted I motor for'regulating said brake operating means; a source of current for said motor; a reversing swltch for controlling the. supply of current to the motor; and means operable by the motor for adjusting the p'osition of the latter to vary its value as a counterweight, thereby controlling the tension produced by the brake mechanisnrupon the roll.

5. A web tension device comprising, in

' combination with a roll support and a machine to which the .web is to be supplied;

brake mechanism for controlling the roll;

means governed by the tension 'ofthe web for operating said brake mechanism; a counterbalance comprising a movably mounted motor forv regulating said brake operating means; a source of current for said motor;

a reversing switch located accessibly to the operator of said machine for controlling the suppl of current to the motor; and means opera le by the motor for'adjusting the position of the latter to vary its counterbalancin eflfect, thereby controlling the tension prloduced by the brake mechanism upon the r0 1.

6. A web tension device comprising, in

combination with a-roll support and "a printin g press to which the web is to besupplied;

brake mechanism for controlling the roll;

7 A web tension device comprising, in

combination with a rollsupport and a printing press to which the web is to be supplied; brake mechanism for controlling the roll;

means governed by the tension of the web for operating said brake mechanism; a counterbalance comprislng a movably mounted motor for regulating saidbrake operating means; a source of current for said motor: a reversing switch located at a control station adjacentlthe press for controlling the supply and directi'onbf the current to the motor; and means comprising a threaded rod and an internally threaded motor carriage thereon geared to the motor for ad justing the position of the latter tovary its counterbalancing 'efit'ect, thereby controlling the tension produced by the brake mecha nism upon the roll.

8. 'A web tension device comprising, in combination with a roll support and a printing press to which the web is to be supplied; brake mechanism for controlling the roll;

means including a compensating rollergoverned by the tension of the web for operating said brake mechanism; a counterbalance for said. roller including a rod and a motor mounted thereon, said motor being movable under its own power on said rod; a source of current for. said motor; and a reversing switch for controlling the supply of current to said motor.

9. A web tension device comprising, in comm-bination with aroll support and a printing press to which the web is to be supplied; brake mechanism for controlling the roll; means including a compensating roller governed by the tension of the web for operating said brake mechanism; a counterbalance for said roller including a rod and a motor mounted thereon, said motor being movable under its own power on said rod; a source of current for said motor; and a reversing switch located at a control station near the press for controlling the supply of current to the motor. 10. A tension device for web rolls including: means for bringing web rolls; one at a time, into feeding position; controlling mechanism governed by the tension of the web from the roll which is in feeding position, said controlling mechanism including a movably mounted motor operating as a counterweight; v and brake mechanism for said rolls to coact with said controlling mechanism.

11. A tension device for web rolls including: means for bringing web rolls, one at a time, into feeding position; controlling mechanism governed by the tension of the web .from the roll which is in feeding position,

said controlling mechanism including a counterweight controllable from a remote point to adjust the position thereof; and brake mechanism for said rolls to co-act with said controlling mechanism.

12. A web tension device comprising, in combinationwith a roll support and a printing press to which the web is to be supplied: brake mechanism for controlling the roll;

means including a com ensating roller governed by the tension 0? the webfor operating said brake mechanism; and a movably mounted motor controllable from a press control station for counterbalancing said compensatin roller to thereby control the tension app Rd to the roll.

In witness whereof I hereunto subscribe my name to this specification. ALLAN J, CLINE.