US3679115A - Uniform pressure draw rolls - Google Patents

Uniform pressure draw rolls Download PDF

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Publication number
US3679115A
US3679115A US95282A US3679115DA US3679115A US 3679115 A US3679115 A US 3679115A US 95282 A US95282 A US 95282A US 3679115D A US3679115D A US 3679115DA US 3679115 A US3679115 A US 3679115A
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US
United States
Prior art keywords
roll
web
arm
gripping
bridge
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
US95282A
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English (en)
Inventor
David K Stock
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Application granted granted Critical
Publication of US3679115A publication Critical patent/US3679115A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B41/00—Supplying or feeding container-forming sheets or wrapping material
    • B65B41/12—Feeding webs from rolls
    • B65B41/16—Feeding webs from rolls by rollers

Definitions

  • each roll comprises a series of short roll segments mounted on a common shaft of relatively small diameter, and, on only one of the rolls, means for applying pressure against the shaft between each longitudinally adjacent pair of roll segments.
  • the small diameter shaft and segmented construction provides the capability of accommodating localized variations in pressure between the two rolls because the shaft of-the pressure roll can flex without distorting its end bearings.
  • Fluid operated power cylinders apply downward pressure on a vertically movable upper draw roll.
  • the cylinders are connected to a common pressure line and are so dimensioned and arranged to maintain equal web gripping force in the nip between the upper draw roll and a lower draw roll.
  • FIG. 1 is a transverse section through a typical bag making machine at a web gripping zone incorporating the improved FIG. 3 is a longitudinal section taken along lines 3-3 on FIG. 1.
  • the lower draw roll 16 comprises two sections which are centrally secured in coaxial relation by means including a stub shaft 40 on one roll section that is secured by a key 42 in a complementary bore of the other roll section.
  • a stub shaft 40 on one roll section that is secured by a key 42 in a complementary bore of the other roll section.
  • one hub portion 41 around the bore has a radial saw cut whereby a locking bolt 43 extending loosely through one half of the hub and threaded into the other half, clamps the hub onto the key and stub shaft.
  • the stub shaft 40 merges with an integral bearing journal 44 that is seated in a central ball hearing 46.
  • the ball bearing 46 (FIG.
  • the outer surface of the draw roll 16 comprises a resilient sleeve 55 provided with the usual circumferential grooves for fixed stripper fingers 60 that prevent the web from rolling around the draw roll.
  • Each stripper finger is secured to a common mounting bar 62 that is bolted to frame blocks 66 on the frame plates 12 and 14.
  • the upper end of each block is provided with a spring socket that holds a compression spring 70, the purpose ofwhich is later explained.
  • Circumferential grooves in a resilient outer sleeve 85 on the upper draw roll are aligned with the grooves of the resilient sleeve 55 of the lower draw roll and are each associated with a stripper finger 86.
  • These strip er fingers are in fixed relation to the upper draw roll 18, and are thus mounted on a tie bar 88 that has end portions bolted to the pivoted support arms 84.
  • Tie bar 88 is formed of three interconnected sections, end sections 90 (FIG. 1) which end short of the central bearing 78, and a center section 92 that is notched on its underside to clear a pivotally mounted pressure arm 94 which is aligned with the support yoke 48.
  • the pressure arm 94 is provided at one end with a downwardly facing arcuate surface which is engaged with the upper sector of the bearing 78, and at the other end has a pivot connection 96 to two depending arms of an overhead clevis bracket 98.
  • the bracket 98 is bolted to a transverse bridge beam 100 which spans and is secured to the frame plates 12 and 14 by machine screws, one of which is shown at 102.
  • the bridge beam 100 is provided with upstanding side flanges and lateral reinforcing webs to resist both longitudinal and torsional flexure.
  • Each cylinder 106 and 110 is of the single acting type and has a base inlet conduit 112 connected to a common manifold 113.
  • the springs raise the pivot arms 84 and elevate the upper draw roll approximately one-eighth of an inch. This prevents the development of flat spots on the resilient surfaces of the draw rolls when the draw rolls are not in operation, and opens the nip between the rolls for initial threading of the web.
  • the cylinders 106 and 110 are pressurized so that their associated piston rods react against the support arms 84 and the central pressure arm 94 in the expected manner, However, the central air cylinder 110 must apply more force than the end cylinders 106 in order to equalize the nip force along the rolls.
  • pivot 96 of pressure arm 94 is farther from the axis of the upper draw roll, than are the pivots 86 of the support arms 84.
  • the slight difference in pivot locations does not adversely affect the raising and lowering ofthe upper draw roll.
  • a similar effect can be obtained by using three cylinders of the same size, and reducing the pressure of the fluid supplied to the two end cylinders by means of a pressure regulator.
  • the end result of the structure described is that equal nip force is produced along the entire nip of the upper and lower draw rolls because the central cylinder provides proportionately more force than the end cylinders, and because the lower draw roll is rigidly supported at points vertically aligned with the points of force application against the upper draw roll.
  • the folded portions will cause a running deformation of the resilient sleeves 55 and where the web has increased plies due to the folds, because the nip force is uniform along the length of the nip.
  • the present draw roll structure maintains intimate and coextensive gripping engagement with the web.
  • the present draw roll structure does not cause the web to veer, and provides accurate tracking of the web regardless of the variations it may have in the number of plies across its width.
  • a draw roll assembly for gripping the web comprising an upright frame plate at each side of the machine, a transverse bridge beam spanning said frame plates, a lower roll rotatably mounted between said frame plates, an upper roll displaceably mounted for downward engagement with said lower roll, a fluid operated cylinder mounted on said bridge for applying downward bias to each end portion of said upper roll, an intermediate fluid operated cylinder mounted on said bridge for applying a downward bias on said upper roll, a bracket depending from said bridge, and a presser arm pivoted to said bracket and extending under the piston rod of said intermediate cylinder above the path of the web, said presser arm having an arcuate undersurface engaged with a complementary upper surface of said upper roll to apply downward bias thereto without interference with the web.
  • Apparatus according to claim 3 and a pivot arm connected to each end of said upper gripping roll, means pivoting each arm to the adjacent one of said frame plates, a mounting bar interconnecting said frame side plates beneath the path of the web and intermediate the ends of said pivot arms, and a compression spring mounted between each pivot arm and said mounting bar, said springs applying upward bias to said upper roll for releasing gripping pressure and lifting said upper roll when all three of said pressure cylinders are deenergized.
  • a draw roll assembly for gripping the web comprising an upright frame plate at each side of the machine, a transverse bridge beam spanning said frame plates, a lower roll rotatably mounted between said frame plates, an upper roll movably mounted for downward engagement with said lower roll, fluid operated cylinders mounted on said bridge for applying downward bias to each means for causing said central cylinder to apply proportionately more force than said end cylinders in order to maintain the linearity of said movable roll and produce a uniform gripping force along the nip of said fixed and movable rolls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Replacement Of Web Rolls (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US95282A 1970-12-04 1970-12-04 Uniform pressure draw rolls Expired - Lifetime US3679115A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9528270A 1970-12-04 1970-12-04

Publications (1)

Publication Number Publication Date
US3679115A true US3679115A (en) 1972-07-25

Family

ID=22251137

Family Applications (1)

Application Number Title Priority Date Filing Date
US95282A Expired - Lifetime US3679115A (en) 1970-12-04 1970-12-04 Uniform pressure draw rolls

Country Status (6)

Country Link
US (1) US3679115A (de)
JP (1) JPS516942B1 (de)
BE (1) BE772591A (de)
DE (1) DE2137350B2 (de)
FR (1) FR2117042A5 (de)
GB (1) GB1311459A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061260A (en) * 1976-03-29 1977-12-06 Copp Robert M Bag making machine
FR2386348A1 (fr) * 1977-04-06 1978-11-03 Stamicarbon Procede de preparation d'un catalyseur sur des systemes de support
FR2437933A1 (fr) * 1978-10-04 1980-04-30 Jagenberg Werke Ag Dispositif d'etirage en largeur pour bandes de materiau en defilement, en particulier, en papier
DE3139118A1 (de) * 1981-10-01 1983-04-28 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zugwalzenpaar fuer falzappartate
US4492327A (en) * 1981-09-21 1985-01-08 Carrier Corporation Tube pulling apparatus
US5702045A (en) * 1994-08-11 1997-12-30 Ramisch Kleinewefers Gmbh Roll for the pressure treatment of cloth webs
US5836500A (en) * 1996-02-27 1998-11-17 Asselin Guiding device using a non-bending segmented rotary roll

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2853162C2 (de) * 1978-12-08 1982-05-19 Vasilij Alekseevič Moskva Čumakov Einrichtung zum Herstellen von Gußteilen mit gerichteter Kristallisation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970911A (en) * 1932-05-19 1934-08-21 Budd Edward G Mfg Co Metal working machine
US2718827A (en) * 1952-10-08 1955-09-27 Farrel Birmingham Co Inc Paper calender
GB747347A (en) * 1952-12-23 1956-04-04 William Meikle Cochran Improvements relating to calenders and rolling mills
US3119324A (en) * 1960-08-29 1964-01-28 Beloit Iron Works Controlled deflection roll

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970911A (en) * 1932-05-19 1934-08-21 Budd Edward G Mfg Co Metal working machine
US2718827A (en) * 1952-10-08 1955-09-27 Farrel Birmingham Co Inc Paper calender
GB747347A (en) * 1952-12-23 1956-04-04 William Meikle Cochran Improvements relating to calenders and rolling mills
US3119324A (en) * 1960-08-29 1964-01-28 Beloit Iron Works Controlled deflection roll

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061260A (en) * 1976-03-29 1977-12-06 Copp Robert M Bag making machine
FR2386348A1 (fr) * 1977-04-06 1978-11-03 Stamicarbon Procede de preparation d'un catalyseur sur des systemes de support
FR2437933A1 (fr) * 1978-10-04 1980-04-30 Jagenberg Werke Ag Dispositif d'etirage en largeur pour bandes de materiau en defilement, en particulier, en papier
US4239142A (en) * 1978-10-04 1980-12-16 Jagenberg Werke Aktiengesellschaft Broad-drawing apparatus
US4492327A (en) * 1981-09-21 1985-01-08 Carrier Corporation Tube pulling apparatus
DE3139118A1 (de) * 1981-10-01 1983-04-28 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zugwalzenpaar fuer falzappartate
US5702045A (en) * 1994-08-11 1997-12-30 Ramisch Kleinewefers Gmbh Roll for the pressure treatment of cloth webs
US5836500A (en) * 1996-02-27 1998-11-17 Asselin Guiding device using a non-bending segmented rotary roll

Also Published As

Publication number Publication date
BE772591A (fr) 1972-01-17
DE2137350B2 (de) 1973-09-27
JPS516942B1 (de) 1976-03-03
FR2117042A5 (de) 1972-07-21
DE2137350C3 (de) 1974-05-02
GB1311459A (en) 1973-03-28
DE2137350A1 (de) 1972-06-29

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