US1151527A - Cutting-knife for calenders. - Google Patents

Cutting-knife for calenders. Download PDF

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Publication number
US1151527A
US1151527A US2966615A US1151527A US 1151527 A US1151527 A US 1151527A US 2966615 A US2966615 A US 2966615A US 1151527 A US1151527 A US 1151527A
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US
United States
Prior art keywords
knife
roll
cutting
calenders
action
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
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Inventor
George H Lewis
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.)
Fisk Rubber Co
Original Assignee
Fisk Rubber Co
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 Fisk Rubber Co filed Critical Fisk Rubber Co
Priority to US2966615 priority Critical patent/US1151527A/en
Application granted granted Critical
Publication of US1151527A publication Critical patent/US1151527A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/02Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
    • B26D1/03Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members
    • B26D1/035Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members for thin material, e.g. for sheets, strips or the like
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/235Calendar
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/647With means to convey work relative to tool station
    • Y10T83/6584Cut made parallel to direction of and during work movement
    • Y10T83/6604Tool in contact with surface of work-conveying means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/647With means to convey work relative to tool station
    • Y10T83/664Roller

Definitions

  • lhis invention relates to cutting knives for-calenders, which are arranged to slit by the roll; With-such an arrangement the.
  • An object of this invention is to provide a knife or plurality of knives for slitting material during the calendering operation
  • Another object is to provide a device of the class described, wherein the knives are so arranged that the pressure thereof against the material being calendered is increased by the drag of material itself.
  • FIG. 1 it represents a calender roll of the usual type which is rotatably mounted in a frame A and driven in any suitable manner.
  • the roll 0, shown in the drawings may be arranged for steam and hot water heating in the usual manner, if desired, and preferably should be, when used for calendering rubber stock.
  • a rod Z) is mounted in parallel and spaced relation with the roll a and is suitably fixed in brackets secured to the frame A.
  • the rod 6 has a key 0 fixed therein which extends entirely across the rod. The latter serves to support a plurality of knife supporting arms in a manner to be described.
  • 1 represents a sleeve having an integral flange 2, which is slidable on the rod 6 but is held against rotation by the key 0.
  • the sleeve 1 is cutaxially in several places as indicated at 4 in Figs. 3 and a and is threaded at one end to receive a nut 5.
  • Suitable notches 3 and 6 are cut in the periphery of the flange 2 and nut 5 to receive a spanner wrench.
  • the sleeve 2 is held to the shaft 12 by frictional resistance. In practice the amount of this frictional resistance is so gaged that the sleeve 1 will not be displaced from its axial position on the shaft 7) by ordinary vibrations but may be readily moved by the operator without loosening the nut 5.
  • Each of these arms supports a knife 9, which is sharpened to a cutting edge at 10.
  • Each knife 9 is clamped to one face of an arm 8 by a plate 11, which is secured to the arm. by a pair of cap screws 12.
  • the inclination of the knife 9 relative to the arm 8 may be' varied within limits as desired.
  • the sleevel has been shown as supporting a pair of arms 8 and, while this arrangement is preferable in many cases, a single arm only may be mounted on the sleeve as shown at the left of Fig. 2.
  • a cutting mechanism for slitting a web of material comprising in combination, a roll for feeding the web and a knife supported in position to bear on said roll and to be forced against said web by the rotational action of the roll.
  • a cutting mechanism for slitting material during a calendering operation comprising in combination, a roll and a pivotally supported knife arranged to engage and to be forced against said roll by gravitational action.
  • a cutting mechanism for slitting material during a calendering operation comprising in combination, a roll and a pivotally supported knife arranged to be forced against said roll by gravitational action and the dragging action of the calendered material.
  • a cutting mechanism for slitting materialduring a calendering operation comprising in combination, a roll over which the material is arranged to pass and a pivotally supported knife arranged to contact with the roll to slit the materialand to be forced thereagainst by gravitational action,
  • the point of contact of the knife with the roll being so located relatively to the center of the roll and said pivotal support that the pressure on the knife is increased by the drag of the material.
  • a cutting device for calenders adapted to slit material as it is calendered, comprising in combination, a suitable calender roll, a rod adjacent said roll, a sleeve azu'ally adjustable thereon and a knife rotatably supported on said sleeve arranged to' engage said roll and to be forced against said roll by gravitational action, all constructed and arranged so that the pressure on said knife is accentuated by the dragging action of the calendered material.
  • a cutting device for calenders adapted to slit material as it is calendered, comprising in combination a suitable calender roll, a rod mounted adjacent thereto, a plurality of sleeves axially adjustable on said rod, and one or more knives rotatably supported 011 each of said sleeves, each thereof arranged to engage the periphery of said roll and to be forced against said roll by gravitational action, all constructed and arranged so that the pressure on said knife is accentuated by the dragging action of the calendered material, each of said knives be- -10 ing freely and independently movable on their supporting sleeve and arranged to be readily removed from said roll at will.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Description

G. H. LEWIS,
CUTTING KNIFE FOR CALENDERS.
APPLICATlON FILED MAY 21. 1915.
1,151,527, Patented Aug. 24, 1915.
2 SSSSSSSSSS ET I.
WITNESSES:
A TTOR NE Y3 G. H. LEWIS.
CUTTING KNIFE FOR'CALENDERS.
APPLICATION FILED MAY 21. 1915.
Patented Aug. 24, 1915.
2 SHEETS-SHEET 2.
WITNESSES:
IN V EN TOR.
By k f.
A TTORNE YS GEORGE E. LEWIS, OF CHICOPEE FALLS, MASSACHUSETTS, ASSIGNOR TO THE FISK Specification of Letters Patent.
CHICOPEE FALLS, MASSACHUSETTS, A CORPORATION OF CUTTING-KNIFE FOR CALENDERS.
ratenteaaag. 2a, 1915.
Application filed may 21, 1915. Serial No. 29,666.
To all whom. it may concern:
Be it known that I, GEORGE H. Lnwrs, a citizen of the United States of America, residing in the city of Chicopee Falls, county of Hampden, and State of Massachusetts, have invented certain new and useful Improvements in Cutting-Knives for Calenders, of which the following is a specification.
lhis invention relates to cutting knives for-calenders, which are arranged to slit by the roll; With-such an arrangement the.
cutting is accomplished by thetop .of the knife rather than bythe pointand the dragging action of the material being calendered tends to force the knife away from the roll. To insure proper cutting action with the arrangement just described, it has been found necessary to use strong elastic means to force the knife against the roll and the use of said means has been found in ractice to score the periphery of the calen er roll in a short time. Furthermore, the use of the elastic means prevents quick withdrawal of the knife from the roll since said means must first be disconnected. These disadvantages I seek to overcome by my invention.
An object of this invention is to provide a knife or plurality of knives for slitting material during the calendering operation,
which are pivotally mounted and arranged to engage the calender roll by gravitational action and to be quickly and conveniently withdrawn from cutting position.
Another object is to provide a device of the class described, wherein the knives are so arranged that the pressure thereof against the material being calendered is increased by the drag of material itself.
A further object is to provide improved means for axially positioning a set of knives 'on a pivotal support, which permits instant tional view partly in section of a single cutting. knife; and Fig. 4 is a sectional view taken on the line .l4= of Fig. 3 and looking in the direction of the arrows.
Referringto the drawings in detail; it represents a calender roll of the usual type which is rotatably mounted in a frame A and driven in any suitable manner. The roll 0, shown in the drawings may be arranged for steam and hot water heating in the usual manner, if desired, and preferably should be, when used for calendering rubber stock. A rod Z) is mounted in parallel and spaced relation with the roll a and is suitably fixed in brackets secured to the frame A. The rod 6 has a key 0 fixed therein which extends entirely across the rod. The latter serves to support a plurality of knife supporting arms in a manner to be described.
Referring more particularly to Figs. 3 and 4: 1 represents a sleeve having an integral flange 2, which is slidable on the rod 6 but is held against rotation by the key 0. The sleeve 1 is cutaxially in several places as indicated at 4 in Figs. 3 and a and is threaded at one end to receive a nut 5. Suitable notches 3 and 6 are cut in the periphery of the flange 2 and nut 5 to receive a spanner wrench. By tightening the nut 5 the sleeve 2 is held to the shaft 12 by frictional resistance. In practice the amount of this frictional resistance is so gaged that the sleeve 1 will not be displaced from its axial position on the shaft 7) by ordinary vibrations but may be readily moved by the operator without loosening the nut 5.
Loosely mounted on the sleeve 1 and loosely held between the head 2 and nut 5,
are a pair of arms 8, which are freely and independently movable on the sleeve. Each of these arms supports a knife 9, which is sharpened to a cutting edge at 10. Each knife 9 is clamped to one face of an arm 8 by a plate 11, which is secured to the arm. by a pair of cap screws 12. By this arrangement the inclination of the knife 9 relative to the arm 8 may be' varied within limits as desired. In Figs. 3 and 4, the sleevel has been shown as supporting a pair of arms 8 and, while this arrangement is preferable in many cases, a single arm only may be mounted on the sleeve as shown at the left of Fig. 2.
N The operation of the cutting device de-' when a knife 9 is in cutting position, it so engages the periphery of theroll that the only force acting to hold theknife against the roll a is that due to gravity. In practice, however, and especially when rubber stock is cut, it has been found that the material (Z exerts dragging action on the lmife 9 to still further increase the pressure thereon. This increased pressure is in reality 'due to a toggle action wherein lines drawn from the center of the roll at and the center of rod 6 to the point of engagement of the knife 9 with the roll may be considered as links and. the force acting on the toggle as the moving material at; Obviously, as the two links of the toggle are moved downwardly to approach a single straight line drawn between the centers of roll a and rod 6 so that the three points of the toggle all lie in a same line, the pres: sure on the lmife 9 is greatly increased and as the links are moved upwardly the pressure is diminished. The range of pressure due to this toggle arrangement is, therefore, great and any pressure from a slight one to one great enough to break the knife may be obtained. Thus, in practice, a wide range '-.of adjustment is provided for the knives 9 to permit the slitting of various materials. In former structures, where the point of contact of the knife with the roll lay below the line connecting the pivotal points of the two elements, this dragging action was ob jectionable, as it diminished the pressure of the knife. It will be clearly obvious from the above analogy that the drag of the 'material tends tobreak the toggle and force the knife away from the material.
Thus, heavy springs were necessary to overcome the eifect of the drag and to supply the necessary pressure. The omission of the springs, heretofore used, and the improved arrangement wherein the dragging action is turned to advantage permits a very simpleyet highly efficient structure.
1. A cutting mechanism for slitting a web of material, comprising in combination, a roll for feeding the web and a knife supported in position to bear on said roll and to be forced against said web by the rotational action of the roll.
2. A cutting mechanism for slitting material during a calendering operation, comprising in combination, a roll and a pivotally supported knife arranged to engage and to be forced against said roll by gravitational action.
3. A cutting mechanism for slitting material during a calendering operation, comprising in combination, a roll and a pivotally supported knife arranged to be forced against said roll by gravitational action and the dragging action of the calendered material.
4. A cutting mechanism for slitting materialduring a calendering operation, comprising in combination, a roll over which the material is arranged to pass and a pivotally supported knife arranged to contact with the roll to slit the materialand to be forced thereagainst by gravitational action,
the point of contact of the knife with the roll being so located relatively to the center of the roll and said pivotal support that the pressure on the knife is increased by the drag of the material.
5. A cutting device for calenders, adapted to slit material as it is calendered, comprising in combination, a suitable calender roll, a rod adjacent said roll, a sleeve azu'ally adjustable thereon and a knife rotatably supported on said sleeve arranged to' engage said roll and to be forced against said roll by gravitational action, all constructed and arranged so that the pressure on said knife is accentuated by the dragging action of the calendered material.
6. A cutting device for calenders, adapted to slit material as it is calendered, comprising in combination a suitable calender roll, a rod mounted adjacent thereto, a plurality of sleeves axially adjustable on said rod, and one or more knives rotatably supported 011 each of said sleeves, each thereof arranged to engage the periphery of said roll and to be forced against said roll by gravitational action, all constructed and arranged so that the pressure on said knife is accentuated by the dragging action of the calendered material, each of said knives be- -10 ing freely and independently movable on their supporting sleeve and arranged to be readily removed from said roll at will.
GEORGE H. LEWIS.
US2966615 1915-05-21 1915-05-21 Cutting-knife for calenders. Expired - Lifetime US1151527A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111724A (en) * 1991-05-21 1992-05-12 Gould Inc. Slitter knife arrangement
US5964024A (en) * 1997-06-25 1999-10-12 Norkol/Fibercore, Inc. Roll cutter
US20030172787A1 (en) * 2002-02-04 2003-09-18 Wallace Marcus T. Plunge cut paper roll converter
US11458646B2 (en) 2017-02-22 2022-10-04 Core Link Ab Method and apparatus for removing wrapping from rolls

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111724A (en) * 1991-05-21 1992-05-12 Gould Inc. Slitter knife arrangement
US5964024A (en) * 1997-06-25 1999-10-12 Norkol/Fibercore, Inc. Roll cutter
US6282766B1 (en) 1997-06-25 2001-09-04 Fibercore Equipment Co. Roll cutter
US20030172787A1 (en) * 2002-02-04 2003-09-18 Wallace Marcus T. Plunge cut paper roll converter
US7878098B2 (en) * 2002-02-04 2011-02-01 P&M Services, Inc. Plunge cut paper roll converter
US7882773B2 (en) * 2002-02-04 2011-02-08 P&M Services, Inc. Plunge cut paper roll converter
US11458646B2 (en) 2017-02-22 2022-10-04 Core Link Ab Method and apparatus for removing wrapping from rolls

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