US3724735A - System for driving or braking a strip - Google Patents

System for driving or braking a strip Download PDF

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Publication number
US3724735A
US3724735A US00131925A US3724735DA US3724735A US 3724735 A US3724735 A US 3724735A US 00131925 A US00131925 A US 00131925A US 3724735D A US3724735D A US 3724735DA US 3724735 A US3724735 A US 3724735A
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US
United States
Prior art keywords
strip
shoe
roller
jack
compressed air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00131925A
Inventor
P Gay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creusot Loire SA
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Creusot Loire SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Creusot Loire SA filed Critical Creusot Loire SA
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Publication of US3724735A publication Critical patent/US3724735A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/003—Regulation of tension or speed; Braking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2812/00—Indexing codes relating to the kind or type of conveyors
    • B65G2812/02—Belt or chain conveyors
    • B65G2812/02128—Belt conveyors
    • B65G2812/02138—Common features for belt conveyors
    • B65G2812/02148—Driving means for the belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/517—Drying material

Definitions

  • Means are therefore required to impart these different required traction conditions to the strip.
  • Such means are generally either driving or braking rollers, around which the strip extends over an angle a, as shown in FIG. 1.
  • a stationary member is disposed outside the roller and formsa chamber between itself and the roller, a pressure fluid being introduced into said chamber to apply the strip to the roller.
  • the object of this invention is to improve these latter known systems.
  • a system for driving a strip comprising a roller for receiving strip, a shoe applicable radially toward the roller in the region in which the strip will be received, and means to inject a pressure fluid radially inward the shoe, the system being characterized in that the shoe is slightly movable in a fixed frame by ajack so that when pressure fluid is applied between the shoe and a strip received by theroller, the strip will be applied against the roller with a force equal to that exerted by the jack on the shoe, while contact between the shoe and'the strip will be prevented by the formation of a very thin fluid cushion which will leave only a very small clearance between the shoe and the strip and which will prevent any rubbing of the shoe on the strip.
  • pressure fluid is compressed air.
  • FIG. 1 is a diagrammatic end elevation of a roller with a strip applied to it.
  • FIG. 2 is a vertical section of this embodiment.
  • the strip 1 moves in the direction of the arrow and passes successively around a deflector roller 2, and then a drive (or brake) roller 3 and finally a deflector roller 4.
  • Reference 9 denotes the frame which supports the bearings forming the axes of rotation of the rollers 2, 3 and 4.
  • a jack 7 fed with pressure fluid by the device 8 applies the shoe 5 against the strip 1 in the region where said strip extends around the roller 3.
  • a device 6 feeds compressed air to the cavity of the shoe 5 adjacent the strip.
  • a valve 11 provides a varying pressure loss between the supply 6 and the shoe 5 so that the rate of flow of the fluid can be reduced. Said flow will be adjusted for a given force of the jack 7 to a value just sufficient to prevent the shoe 5 from rubbing on the strip.
  • a system for driving a strip comprising a roller for receiving a strip, a shoe movable radially toward the roller in the region in which the strip is received, and means for injecting compressed air radially inward of said shoe against said strip, a fixed frame movably supporting said shoe, a jack moving said shoe in said frame whereby when compressed air is applied between said shoe and said strip on said roller, said strip is applied against said roller with a force equal to that exerted by said jack on said shoe, the compressed air forming a very thin fluid cushion and providing a very small clearance between said shoe and said strip preventing rubbing of said shoe on said strip.
  • said means for injecting pressure fluid between said shoe-and said strip including a valve providing an adjustable pressure loss.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Braking Arrangements (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Advancing Webs (AREA)

Abstract

A system to apply a strip to a roller including a shoe movable radially toward the roller in the region where the strip will engage the roller, a jack to move the shoe and means to inject a fluid between the shoe and strip to transfer the force of the jack to the strip while keeping the shoe clear of the strip.

Description

United States Patentv 1 51 Apr. 3, 1973 Gay [54] SYSTEM FOR DRIVING OR BRAKING ASTRIP [75] Inventor: Pierre Gay, La Tour-en-Jarez,
France [73] Assignee: Creusot-Loire Enterprises, Paris,
France [22] Filed: Apr. 7, 1971 [21] Appl. No.: 131,925 1 [30] Foreign Application Priority Data Mar. 8, 1970 France ..70I6777 July 17, 1970 France ..7026343 [52] U.S. Cl .....226/95 [51]. Int. Cl. ..B65li 23 /24 [58] Field of Search.....l "226/7, 95, 195,183
[56] References Cited UNITED STATES PATENTS- 2,955,732 10/1960 Stobb "226/95 2/1964 Davison ..226/95X 6/1966 Altobelli ..226/95 Primary Examiner-Richard A. Schacher Attarney-Cameron, Kerkam & Sutton 571 ABSTRACT A system to apply a strip to a roller including a shoe movable radially toward the roller in the region where the strip will engage the roller, a jack to move the shoe and means to inject a fluid between the shoe and strip to transfer the force of the jack to the strip while keeping the shoe clear of the strip.
2 Claims, 2 Drawing Figures PATENTEM N 375 3,724,735
During the various stages in the production of a metal strip it is frequently necessary for it to move continuously and for it to be subjected to appropriate traction conditions in various zones for the purposes of the operations that it is required to undergo in such zones.
Means are therefore required to impart these different required traction conditions to the strip.
Such means are generally either driving or braking rollers, around which the strip extends over an angle a, as shown in FIG. 1.
The known formulas indicate the limits in which a roller of this kind can convert a tension t into an outlet tension t The following equation applies:
in whichfis the coefficient of friction of the strip on the roller and a is the angle by .which the strip extends around the roller. The tension increase or reduction capacity is therefore limited by the slip of the strip on the roller.
To increase this drive capacity, it is conventional practice to use pressure rollers which apply the strip against the drive or brake roller.
These pressure rollers have a limited effect, because the force that they exert on the strip must not be such as to result in any deformation of the latter.
They also .have the very serious disadvantage of producing faults in the strip guidance, and such faults may be such that the strip'leaves its normal path, so that itis then impossible for the production line to continue operating.
To increase this drive capacity, it has also been proposed to exert pressure on the strip in the region in which the said strip is applied to the roller. In the prior art systems, a stationary member is disposed outside the roller and formsa chamber between itself and the roller, a pressure fluid being introduced into said chamber to apply the strip to the roller.
These known systems have the disadvantage of requiring a considerable flow of pressure-transmitting fluid. There is an appreciable clearance between the chamber and the roller over which the strip (of varying thickness) extends.
The object of this invention is to improve these latter known systems.
According to the present invention there is provided a system for driving a strip comprising a roller for receiving strip, a shoe applicable radially toward the roller in the region in which the strip will be received, and means to inject a pressure fluid radially inward the shoe, the system being characterized in that the shoe is slightly movable in a fixed frame by ajack so that when pressure fluid is applied between the shoe and a strip received by theroller, the strip will be applied against the roller with a force equal to that exerted by the jack on the shoe, while contact between the shoe and'the strip will be prevented by the formation of a very thin fluid cushion which will leave only a very small clearance between the shoe and the strip and which will prevent any rubbing of the shoe on the strip.
According to a specific feature of the invention, the
pressure fluid is compressed air.
It Wlll be apparent that the combination of the effect of the pressure of the jack on the shoe results in a very small flow of pressure fluid between the shoe and the strip and also prevents any rubbing of the shoe on the strip. These two considerable advantages are not found in the prior art systems. In the invention, firstly, the fluid consumption is greatly reduced and, secondly, the disadvantages of the shoe rubbing on the strip are eliminated.
One embodiment of the system according to the invention willbe explained hereinafter by way of example without limiting force in order that the invention may be more readily understood.
FIG. 1 is a diagrammatic end elevation of a roller with a strip applied to it.
FIG. 2 is a vertical section of this embodiment.
The strip 1 moves in the direction of the arrow and passes successively around a deflector roller 2, and then a drive (or brake) roller 3 and finally a deflector roller 4. Reference 9 denotes the frame which supports the bearings forming the axes of rotation of the rollers 2, 3 and 4.
A shoe Sis guided in the frame 9 at 10.
A jack 7 fed with pressure fluid by the device 8 applies the shoe 5 against the strip 1 in the region where said strip extends around the roller 3. A device 6 feeds compressed air to the cavity of the shoe 5 adjacent the strip.
A valve 11 provides a varying pressure loss between the supply 6 and the shoe 5 so that the rate of flow of the fluid can be reduced. Said flow will be adjusted for a given force of the jack 7 to a value just sufficient to prevent the shoe 5 from rubbing on the strip.
Of course, variants and improvements as to detail, and the use of equivalent means, are possible without departing from the scope of the invention.
I claim:
l. A system for driving a strip comprising a roller for receiving a strip, a shoe movable radially toward the roller in the region in which the strip is received, and means for injecting compressed air radially inward of said shoe against said strip, a fixed frame movably supporting said shoe, a jack moving said shoe in said frame whereby when compressed air is applied between said shoe and said strip on said roller, said strip is applied against said roller with a force equal to that exerted by said jack on said shoe, the compressed air forming a very thin fluid cushion and providing a very small clearance between said shoe and said strip preventing rubbing of said shoe on said strip.
2. A system according to claim 1, said means for injecting pressure fluid between said shoe-and said strip including a valve providing an adjustable pressure loss.
a m: a a

Claims (2)

1. A system for driving a strip comprising a roller for receiving a strip, a shoe movable radially toward the roller in the region in which the strip is received, and means for injecting compressed air radially inward of said shoe against said strip, a fixed frame movably supporting said shoe, a jack moving said shoe in said frame whereby when compressed air is applied between said shoe and said strip on said roller, said strip is applied against said roller with a force equal to that exerted by said jack on said shoe, the compressed air forming a very thin fluid cushion and providing a very small clearance between said shoe and said strip preventing rubbing of said shoe on said strip.
2. A system according to claim 1, said means for injecting pressure fluid between said shoe and said strip including a valve providing an adjustable pressure loss.
US00131925A 1970-05-08 1971-04-07 System for driving or braking a strip Expired - Lifetime US3724735A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7016777A FR2087183A5 (en) 1970-05-08 1970-05-08
FR7026343A FR2097661A6 (en) 1970-05-08 1970-07-17

Publications (1)

Publication Number Publication Date
US3724735A true US3724735A (en) 1973-04-03

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US00131925A Expired - Lifetime US3724735A (en) 1970-05-08 1971-04-07 System for driving or braking a strip

Country Status (6)

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US (1) US3724735A (en)
JP (1) JPS5110195B1 (en)
BE (1) BE763801A (en)
DE (1) DE2122685B2 (en)
FR (2) FR2087183A5 (en)
GB (1) GB1344874A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926353A (en) * 1974-01-11 1975-12-16 Creusot Loire Apparatus adapted for driving or braking a metallic band
US4337884A (en) * 1979-08-17 1982-07-06 Mitsubishi Jukogyo Kabushiki Kaisha Single facer
WO1990005105A1 (en) * 1988-11-08 1990-05-17 Hughes Aircraft Company Pneumatic shoe for high speed filamentary capstan
US5038990A (en) * 1988-11-08 1991-08-13 Hughes Aircraft Company Pneumatic shoe for high speed filamentary capstan
US20100206931A1 (en) * 2007-11-02 2010-08-19 Wataru Mizuno Nip apparatus and nip method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2212187B1 (en) * 1972-12-29 1975-03-28 Creusot Loire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955732A (en) * 1957-12-16 1960-10-11 Anton R Stobb Air pressure means for urging paper web against a rotating cylinder
US3122295A (en) * 1962-06-04 1964-02-25 Sylvania Electric Prod Web transport
US3258184A (en) * 1964-04-20 1966-06-28 Sylvania Electric Prod Tape transport apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955732A (en) * 1957-12-16 1960-10-11 Anton R Stobb Air pressure means for urging paper web against a rotating cylinder
US3122295A (en) * 1962-06-04 1964-02-25 Sylvania Electric Prod Web transport
US3258184A (en) * 1964-04-20 1966-06-28 Sylvania Electric Prod Tape transport apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926353A (en) * 1974-01-11 1975-12-16 Creusot Loire Apparatus adapted for driving or braking a metallic band
US4337884A (en) * 1979-08-17 1982-07-06 Mitsubishi Jukogyo Kabushiki Kaisha Single facer
WO1990005105A1 (en) * 1988-11-08 1990-05-17 Hughes Aircraft Company Pneumatic shoe for high speed filamentary capstan
AU612522B2 (en) * 1988-11-08 1991-07-11 Hughes Aircraft Company Pneumatic shoe for high speed filamentary capstan
US5038990A (en) * 1988-11-08 1991-08-13 Hughes Aircraft Company Pneumatic shoe for high speed filamentary capstan
US20100206931A1 (en) * 2007-11-02 2010-08-19 Wataru Mizuno Nip apparatus and nip method

Also Published As

Publication number Publication date
DE2122685A1 (en) 1971-11-18
FR2097661A6 (en) 1972-03-03
BE763801A (en) 1971-08-02
JPS5110195B1 (en) 1976-04-02
GB1344874A (en) 1974-01-23
FR2087183A5 (en) 1971-12-31
DE2122685B2 (en) 1972-03-16

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