US3248987A - Rotary cutter - Google Patents

Rotary cutter Download PDF

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Publication number
US3248987A
US3248987A US433528A US43352865A US3248987A US 3248987 A US3248987 A US 3248987A US 433528 A US433528 A US 433528A US 43352865 A US43352865 A US 43352865A US 3248987 A US3248987 A US 3248987A
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US
United States
Prior art keywords
blade
drum
cylindrical
sleeves
rotary cutter
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
US433528A
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English (en)
Inventor
Cardinet Guy
Faudemay Edmond Lucien Jean
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.)
Gillette France SA
Original Assignee
Gillette France 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 Gillette France SA filed Critical Gillette France SA
Application granted granted Critical
Publication of US3248987A publication Critical patent/US3248987A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/10—Making cuts of other than simple rectilinear form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D19/00—Shearing machines or shearing devices cutting by rotary discs
    • B23D19/04—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs
    • B23D19/06—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips
    • B23D19/065—Shearing machines or shearing devices cutting by rotary discs having rotary shearing discs arranged in co-operating pairs with several spaced pairs of shearing discs working simultaneously, e.g. for trimming or making strips for cutting along lines not parallel to the longitudinal direction of the material, e.g. oblique or zig-zag cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9374—With spacer interposed between shaft-mounted tools
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9408—Spaced cut forming tool

Definitions

  • Tlu's invention comprises an improved rotary machine for cutting from sheet material bands, strips or ribbons having undulating, sinuous or angular longitudinal edges as distinguished from ribbons of rectilinear shape having straight parallel edges.
  • the machine may be utilized with particular advantage in the production of strips of characteristic pattern recurring at regular intervals arranged in mating relation and produced preferably without waste.
  • bands can be used after being cut into unit lengths, as wrappings for identical objects such as razor blades or razor blade packages.
  • the invention is not limited to this or any specific field but is of general application.
  • An object of the present invention is to provide for this special work a rotary machine of the general type heretofore used in the production of bands having parallel edges, that is to say a machine having cooperating cylinders between which the paper is fed, one being equipped with rotary knives and the other serving as a cutting bed or anvil.
  • the cutting blades instead of being plane and located parallel to each other are undulating, sinuous or angular in contour.
  • the development of this blade shape corresponds to the shaping of the edges of the strip to be cut i.e. to an integer number of identical repetitive patterns desired in the strip.
  • the invention includes within its scope a novel process for producing blades of the required shape.
  • the invention includes novel structure for incorporating such a blade in a rotary cylinder.
  • the contoured circular blade required is produced by first cutting a fiat ring from sheet steel, then deflecting portions of the ring out of its plane and hardening the blade thus formed. In deflecting portions of the ring, the length of its outside perimeter is made equal to the development of the trace that will be cut by the knife.
  • the ring may be preformed by suitable equipment, such as a press provided with cooperating dies curved and arched at regular intervals and at the same time holding both the inner and 3,248,937 Patented May 3, 1966 outer diameters of the conformed knife to a predetermined radius of cylindrical curvature. Having formed the knife in this manner, it is now hardened in its conformed shape and ready to be incorporated in a rotary cuting machine.
  • the outing machine of the present invention includes in its structure a knife-carrying roll or cylinder comprising an inner drum having a smooth continuous cylindrical surface and a series of cylindrical sleeves slidable axially on the drum and having axially undulating or angular circumferential end walls of complementary contour inter-fitting about the entire circuit of the drum and clamped in position to support the ring-shaped ribbon blade upon both sides.
  • FIG. 1 is a plan view of a short section of three mating strips produced by the rotary cutter of this invention
  • FIG. 2 is a view in perspective of the rotary cutter in partially assembled condition
  • FIG. 3 is a view in elevation of the assembled cutter
  • FIG. 4 is a fragmentary sectional view on the line 44 of FIG. 3;
  • FIG. 7 is a view in perspective of one of the bladeclarnping sleeves.
  • FIG. 8 is a plan view of the ring blank from which the blade is formed.
  • FIG. 1 One example of the type of product which it is desired to produce, as shown in FIG. 1, comprises mated strips A, B and C designed to be cut at each revolution of the rotary cutter and having the length L.
  • each section of the strips is included three identical connected blanks a, b and c that when severed may serve as envelopes or tucks for safety razor blades or packages thereof.
  • Each blank has oppositely directed tapering end tongues and a wider central area of roughly octagonal contour.
  • FIGS. 2 and 3 the rotary cutter designed to produce the strips of FIG. 1. It comprises an inner drum or cylinder 10 upon which are mounted a pair of cylindrical end sleeves 11 and three intermediate sleeves 12 all making a close sliding fit on the drum 10.
  • the end walls of the sleeves 11 and 12 are contoured accurately in accordance with the pattern of the strips A, B and C and all portions of these walls are therefore inclined axially or longitudinally with respect to the axis of the drum.
  • each contiguous pair of sleeves 11 or 12 is rigidly clamped an endless blade 13 of thin ribbon steel in the order of .004" in thickness.
  • the inner edge of the blade rests upon the smooth cylindrical surface of the drum 10 and its outer edge protrudes beyond the outer cylindrical surface of the sleeves 11 and 12 a small amount, as for example, by an amount equal to the thickness of the paper to be cut.
  • the blade 13 is itself flexible and must be firmly supported on both sides in order to be operative in its rotary assembly.
  • the first step in the production of the blade consists in cutting or punching from sheet steel a flat ring 13' as suggested in FIG. 8.
  • the cutter diameter of the ring is calculated from the length L of the trace to be cut at each revolution of the cutter in producing the repeating pattern desired.
  • the outside diameter D of the hat ring 13' must therefore be I. divided by 7: and the thickness of the ring must be slightly greater than the thickness of the cylindrical sleeves 11 and 12.
  • the flat ring while still unhardened, is shaped to coincide with the contour of the end walls of the sleeves 12 by being subject to forming pressure between the sleeves acting as cooperating dies, or between similarly shaped dies operating in a die press.
  • various sections of the ring are deflected longitudinally or axially with respect to the axis of the ring, forming in effect a series of oppositely directed open loops, viz. the loops 16 opening outwardly and the loops 17 opening inwardly as shown in FIG. 6.
  • the material of the flat steel ring may be slightly elongated or the outside diameter decreased.
  • the blade 13 preformed as abovedescribed is now heat treated for hardening and tempering.
  • the inside diameter of the preformed and tempered blade may be ground in order to make the blade fit with extreme accuracy to the cylindrical surface of the drum 10. This step is useful in removing from the inner edge of the blade any departure from the desired true cylindrical contour that may have been introduced in the heat treatment of the blade.
  • the tempered and ground blades 13 are now assembled on the drum between the contoured end walls of the sleeves 11 and 12 as suggested in FIG. 2.
  • the sleeves and blades are drawn into rigid clamping engagement between circular end plates 14 secured to the ends of the drum by bolts 15 thus uniting all the elements of the rotary cutter of the present invention.
  • the final step of the process which converts the rotary cutter into a precision instrument, consists in grinding the protruding blade edges to insure that they lie in a single predetermined cylindrical plane true to the axis of the cutter.
  • This cylindrical grinding of the blades imparts to them a square end surface with sharp corner edges and also determine the amount of their edge exposure above the cylindrical surface of the sleeves 11 and 12. If now the drum surface is perfectly cylindrical and is revolving about its true axis, the cutting edge of all the blades will thus lie in a cylindrical plane which is ex actly parallel to the plane of the drum surface and spaced therefrom by the height of the blades.
  • FIG. 5 a typical machine having a rotary cutter with blades 13 for cutting eight strips or bands.
  • the cutter is journaled in a frame and cooperates with a smooth anvil roll 21.
  • the latter is geared to the rotary cutter and maintained under spring pressure against the cutter by compression springs 22 at the base of the frame.
  • the rotary cutter may include any convenient or desired number of blades depending upon the number of strips to be cut.
  • the edge exposure of the blades will depend on the sheet material to be cut and whether it is to cut as a single sheet or in multiple. For cutting a single sheet of paper an edge exposureo'f about the thickness of the paper has proved satisfactory.
  • the individual blades are all identical in shape and may be [replace-ably and interchangeably used in the machine.
  • the sheet In operating the machine of FIG. 5 the sheet is fed at high speed through the bite of the rotary cutter and the anvil roll '21 and the mating strips A, B, C, etc. leaving the rolls are severed by the action of the blades 13. It is usually convenient to direct the severed strips alternately in divergent paths as this contributes to clean separation between the strips and facilitates coiling them on separate take-up reels.
  • the endless blades as shown in FIG. 6 are in themselves flexible and so require rigid support on both sides nearly up to the cutting edge in order to be maintained in operative cutting; condition.
  • the blades are given an initial shape conforming to that of the sleeve walls and the trace of the pattern to be cut. They thus tend naturally to assume the desired contour without the development of appreciable initial strain. They may have any desired contour, departing little or none from the original plane of the flat ring, so long as they are shaped to be supported internally by the inner drum and clamped on both sides by the sleeves against flexing when in operation.
  • a rotary cutter for sheet material comprising an inner drum having a smooth continuous cylindrical surface, cylindrical sleeves on said drum, and :a flexible endless thin ribbon steel blade supported by said drum surface at its inner edge and extending perpendicular to said surface, said blade being clamped rigidly on both sides between a pair of said cylindrical sleeves and protruding therefrom, said blade being of such thinness and flexibility as to require firm support on both sides to give rigidity to its cutting edge, said cutting edge being formed by an end surface with opposed sharp corner edges, lying wholly in a cylindrical plane coaxial with the inner drum and merging at each side with a sharp corner edge.
  • a rotary cutter for sheet material comprising an inner drum having a smooth continuous cylindrical surface, cylindrical sleeves on said drum and having axially undulating circumferential end walls of complementary contour interfitting about the entire circuit of the drum, and a flexible endless thin ribbon steel blade in the order of .004" thickness supported by said drum surface at its inner edge and extending perpendicular to said surface, said blade being clamped rigidly between said cylindrical sleeves on both sides with its cutting edge protruding therefrom and conformed by axially deflected blade portions to the axially undulating contour of contiguous cylindrical sleeves, said blade being of such thinness and flexibility as to require firm support on both sides to give rigidity to its cutting edge, said cutting edge constituting an end surface lying wholly in a cylindrical plane coaxial with the inner drum and defined between sharp corner edges.
  • a rotary cutter for sheet material comprising an inner drum, cooperating sleeves thereon, and an endless flexible blade of such thinness and flexibility as to require firm support on both sides to give rigidity to its cutting edge clamped securely between a pair of sleeves with its cutting edge protruding therefrom, said cutting edge being formed by a square end surface with opposed sharp corner edges, said end surface lying wholly in a cylindrical plane coaxial with said inner drum.
  • a rotary cutter for sheet material comprising an inner drum, cooperating sets of sleeves thereon having mating end walls contoured in the form of oppositely directed open loops, and an endless flexible blade of such thinness and flexibility as to require firm support on both sides to give rigidity to its cutting edge clamped securely between each pair of contiguous sleeves and held in the contoured shape of said sleeves with its cutting edge protruding therefrom, said cutting edge being formed by a square end surface with opposed sharp corner edges, said end surface lying in a cylindrical plane with said inner drum.
  • a rotary cutter for sheet material comprising an inner dru-m, cooperating sleeves thereon having mating end walls, an endless flexible blade of such thinness and flexibility as to require firm support on both sides to give rigidity to its cutting edge located between the end walls of said sleeves and having protruding cutting edge, and means for clamping the sleeves together in position supporting the flexible blade on both sides up to near the cutting edge and with its inner edge shaped to engage the cylindrical surface of the drum, said cutting edge being formed by a square end surface With opposed sharp 5 corner edges, said end surface lying in a cylindrical plane 1,256,657 2/1918 Cameron et a1 8356 X coaxial with said inner drum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US433528A 1959-07-08 1965-01-25 Rotary cutter Expired - Lifetime US3248987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR799626A FR1238852A (fr) 1959-07-08 1959-07-08 Dispositif pour le découpage en continu de rubans à contours réguliers

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US3248987A true US3248987A (en) 1966-05-03

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967009A (en) * 1996-05-30 1999-10-19 Kimberly-Clark Worldwide, Inc. Rotary knife apparatus and cutting method
US6279440B1 (en) 1996-05-30 2001-08-28 Kimberly-Clark Worldwide, Inc. Heavy duty knife apparatus and cutting method
US6298760B1 (en) 1996-05-30 2001-10-09 Kimberly-Clark Worldwide, Inc. Non-symmetrical knife apparatus and cutting method
US6305260B1 (en) 1996-05-30 2001-10-23 Kimberly-Clark Worldwide, Inc. Non-symmetrical heavy duty knife apparatus and cutting method
EP1166980A2 (fr) * 2000-06-26 2002-01-02 Corazza S.p.A. Procédé de découpe d'une feuille pour la production d'un emballage pour un produit pâteux, ainsi qu'un outil de coupe pour la production d'emballages et emballages pour produits pâteux
EP1555094A1 (fr) * 2004-01-14 2005-07-20 Vacotec Co., Ltd. Dispositif de coupe longitudinal pour faire une ligne de coupe avec une forme ondulante

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9017843D0 (en) * 1990-08-14 1990-09-26 Forbo Mayfair Limited Process for producing self-adhesive sheet materials

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422486A (en) * 1890-03-04 Embossing and edge-shaping roller for moldings
US958809A (en) * 1909-06-26 1910-05-24 Fredrick L Hawkins Noodle-cutter.
US1256657A (en) * 1914-10-10 1918-02-19 Cameron Machine Co Process for making surgical bandages.
US1682606A (en) * 1927-01-11 1928-08-28 Dvilnsky Abraham Pinking machine
US2400527A (en) * 1943-12-13 1946-05-21 Rock Hill Printing & Finishing Slitting machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422486A (en) * 1890-03-04 Embossing and edge-shaping roller for moldings
US958809A (en) * 1909-06-26 1910-05-24 Fredrick L Hawkins Noodle-cutter.
US1256657A (en) * 1914-10-10 1918-02-19 Cameron Machine Co Process for making surgical bandages.
US1682606A (en) * 1927-01-11 1928-08-28 Dvilnsky Abraham Pinking machine
US2400527A (en) * 1943-12-13 1946-05-21 Rock Hill Printing & Finishing Slitting machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5967009A (en) * 1996-05-30 1999-10-19 Kimberly-Clark Worldwide, Inc. Rotary knife apparatus and cutting method
US6279440B1 (en) 1996-05-30 2001-08-28 Kimberly-Clark Worldwide, Inc. Heavy duty knife apparatus and cutting method
US6298760B1 (en) 1996-05-30 2001-10-09 Kimberly-Clark Worldwide, Inc. Non-symmetrical knife apparatus and cutting method
US6305260B1 (en) 1996-05-30 2001-10-23 Kimberly-Clark Worldwide, Inc. Non-symmetrical heavy duty knife apparatus and cutting method
EP1166980A2 (fr) * 2000-06-26 2002-01-02 Corazza S.p.A. Procédé de découpe d'une feuille pour la production d'un emballage pour un produit pâteux, ainsi qu'un outil de coupe pour la production d'emballages et emballages pour produits pâteux
EP1166980A3 (fr) * 2000-06-26 2003-10-08 Corazza S.p.A. Procédé de découpe d'une feuille pour la production d'un emballage pour un produit pâteux, ainsi qu'un outil de coupe pour la production d'emballages et emballages pour produits pâteux
EP1555094A1 (fr) * 2004-01-14 2005-07-20 Vacotec Co., Ltd. Dispositif de coupe longitudinal pour faire une ligne de coupe avec une forme ondulante

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Publication number Publication date
FR1238852A (fr) 1960-08-19

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