US3730034A - Cut-off devices for continuous rod-making machines - Google Patents

Cut-off devices for continuous rod-making machines Download PDF

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Publication number
US3730034A
US3730034A US00146037A US3730034DA US3730034A US 3730034 A US3730034 A US 3730034A US 00146037 A US00146037 A US 00146037A US 3730034D A US3730034D A US 3730034DA US 3730034 A US3730034 A US 3730034A
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US
United States
Prior art keywords
rod
ledger
cutting
nodal point
continuous
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
US00146037A
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English (en)
Inventor
E Preston
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.)
Mpac Group PLC
Original Assignee
Molins Ltd
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 Molins Ltd filed Critical Molins Ltd
Application granted granted Critical
Publication of US3730034A publication Critical patent/US3730034A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/14—Machines of the continuous-rod type
    • A24C5/28—Cutting-off the tobacco rod
    • 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
    • Y10T83/04—Processes
    • Y10T83/0515—During movement of work past flying cutter
    • Y10T83/0519—Cyclically varying rate of tool or work movement
    • 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
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4734—Flying support or guide for work
    • 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
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4749—Tool mounted on oscillating standard

Definitions

  • Continuous-rod making machines such as cigarette making machines and cigarette filter rod making machines commonly include a cut-off device which cuts a continuous rod into short lengths.
  • cut-off devices commonly include a ledger which supports the rod during cutting and has a reciprocating motion produced by a crank.
  • the velocity of the ledge varies approximately sinusoidally, whereas the continuous rod travels at a uniform speed.
  • the timing of the knife in relation to the ledger is so arranged that the points in time at which each cutting operation commences and finishes are both either before or are both after the point in time at which the ledger reaches its peak velocity.
  • the knife is preferably one with a part-helical blade, for example as shown in U.S. Pat. No. 3,604,162.
  • the ledger may for example be as shown in U.S. Pat. No. 3,241,414.
  • Preferably cutting takes place during a part of the ledger stroke which includes a nodal point; that is to say a point in time at which the ledger speed equals rod speed. Furthermore in a preferred arrangement the relative displacement between the rod and the ledger before the nodal point is substantially equal to the relative displacement after the nodal point.
  • FIG. I is a diagrammatic representation of a ledger
  • FIG. 2 is a graph of ledger speed against ledger crank angle.
  • a continuous rod 10 formed by a continuous rod making machine travels at uniform speed in the direction of the arrow.
  • a ledger (shown diagrammatically) includes two guide tubes 12 and 13 carried by a body 14.
  • a crank 15 drives a connecting rod 16 which is pivoted to the block 14 by a pin 17.
  • the body 14 is carried by parallel rigid support arms 18 and 19. These arms are pivotally connected to the body 14 at 20 and 21 respectively. and to a frame at 22 and 23 respectively.
  • the pivotal connections may, for example, be crossed spring connections as described and shown in the aforementioned U.S. Pat. No. 3,241,414.
  • rotation of the crank 15 causes the ledger body 14 to reciprocate with approximately a sinusoidal velocity.
  • the crank 15 is driven by a driving means represented diagrammatically at 24 in FIG. 1.
  • a cutter 25 for cutting the continuous rod 10 into the shorter lengths seen on the left hand side of FIG. 1.
  • the cutter 25 and the crank 15 are connected to the common driving means 24 so that the cutter 25 passes between the ledger tubes 12 and 13 and cuts the continuous rod before the ledger body reaches its peak velocity.
  • the relative phases of the cutter 25 and crank 15 may be such that the cut takes place in a part of the ledger stroke after the ledger has passed its peak velocity.
  • FIG. 2 is a graph plotting mainly the ledger speed (i.e. the speed of the ledger body 14 in FIG. 1) against crank angle.
  • the curve C1 shows the ledger speed characteristic for a rod speed S as used in the past.
  • the cutting started at a point A1 and finished at a point A2, these points being at equal distances from the point A3 which is where the ledger velocity is at a peak.
  • the difference between the rod speed and the ledger speed was never very great, being represented by the distance V1 at the beginning and end of the cycle and by the distance V2 (which could be equal to V1) at the mid-point of the cycle.
  • the curve C2 shows the ledger speed characteristic adopted now according to the present invention for use in a rod which still moves at the same speed S.
  • the peak velocity is higher, being produced by an increase in the radius of the crank.
  • Cutting now starts at the point A4 and finishes at the point A5.
  • the ledger velocity curve is such that the relative displacements between the rod and the ledger before and after the nodal point N are approximately equal. That is to say, the area D1 on the graph, bounded by the curve C2, the horizontal line at S and the vertical line at A4, is equal to the area D2 bounded by the curve C2, the horizontal line at S and the vertical line at A5. Thus the displacements on opposite sides of the nodal points cancel out one another.
  • a cigarette or other continuous rod making machine having a cut-off device for cutting a moving continuous rod into predetermined lengths, comprising a ledger which supports the rod during cutting and which is driven in a reciprocatory manner, including an acceleration mode and a deceleration mode during each stroke in the direction of movement of the rod, and a knife for cutting the rod, arranged so that the knife both starts and completes the cut during one of the said modes.
  • a machine according to claim 1 arranged to cut during a part of each ledger stroke which includes a nodal point.
  • a method of cutting a continuous lengthwise moving rod into rod sections of predetermined length comprising supporting the rod by means of a rod supporting means, driving the rod supporting means in a reciprocatory manner, including an acceleration mode and a deceleration mode during each stroke of the rod supporting means while moving in the direction of motion of the rod, and cutting the continuous rod entirely during one of the said modes.
  • a cigarette or other continuous rod making machine having a cut-off device for cutting a continuous lengthwise moving rod into rod sections of predetermined length, comprising a reciprocating ledger to support the rod during cutting; a cutting means for cutting the rod; and drive means for driving the ledger and the cutting means; the driving means being connected to the ledger by a crank so as to drive the ledger with a substantially sinusoidal velocity having an acceleration mode and a deceleration mode during each stroke of the ledger in the direction of motion of the rod, and the driving means being connected to the cutting means so that the cutting means both starts and completes each cut during one of the said modes.
  • a machine according to claim 9 arranged to cut during a part of said mode which includes a nodal point.
  • a machine according to claim 10 in which the relative displacement between the rod and the ledger before the nodal point is substantially equal to the relative displacement after the nodal point.

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  • Shearing Machines (AREA)
US00146037A 1970-05-26 1971-05-24 Cut-off devices for continuous rod-making machines Expired - Lifetime US3730034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2519270 1970-05-26

Publications (1)

Publication Number Publication Date
US3730034A true US3730034A (en) 1973-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00146037A Expired - Lifetime US3730034A (en) 1970-05-26 1971-05-24 Cut-off devices for continuous rod-making machines

Country Status (4)

Country Link
US (1) US3730034A (de)
DE (1) DE2126237A1 (de)
FR (1) FR2097804A5 (de)
GB (1) GB1351130A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815460A (en) * 1972-04-22 1974-06-11 Hauni Werke Koerber & Co Kg Apparatus for severing wrapped tobacco rods or the like
US4997415A (en) * 1986-10-15 1991-03-05 Molins Machine Co. Inc. Continuous rod-making machine
US5992282A (en) * 1995-12-21 1999-11-30 G.D Societa' Per Azioni Device for cutting continuous cigarette rods
US6918328B2 (en) * 1999-12-18 2005-07-19 Hauni Maschinenbau Ag Method of and apparatus for counteracting the lack of balance of parts in a cutoff for cigarettes and the like
US20160146323A1 (en) * 2013-07-05 2016-05-26 International Tobacco Machinery Poland Sp. Z O.O. Ledger mechanism for rod making machines

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140632A (en) * 1959-11-13 1964-07-14 Molins Machine Co Ltd Cigarette rod cut-off device with knife adjustable about three axes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140632A (en) * 1959-11-13 1964-07-14 Molins Machine Co Ltd Cigarette rod cut-off device with knife adjustable about three axes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815460A (en) * 1972-04-22 1974-06-11 Hauni Werke Koerber & Co Kg Apparatus for severing wrapped tobacco rods or the like
US4997415A (en) * 1986-10-15 1991-03-05 Molins Machine Co. Inc. Continuous rod-making machine
US5992282A (en) * 1995-12-21 1999-11-30 G.D Societa' Per Azioni Device for cutting continuous cigarette rods
US6918328B2 (en) * 1999-12-18 2005-07-19 Hauni Maschinenbau Ag Method of and apparatus for counteracting the lack of balance of parts in a cutoff for cigarettes and the like
US20050241448A1 (en) * 1999-12-18 2005-11-03 Hauni Maschinenbau Ag Method of and apparatus for counteracting the lack of balance of parts in a cuttoff for cigarettes and the like
US20160146323A1 (en) * 2013-07-05 2016-05-26 International Tobacco Machinery Poland Sp. Z O.O. Ledger mechanism for rod making machines
US9677652B2 (en) * 2013-07-05 2017-06-13 International Tobacco Machinery Poland Sp. Z O.O. Ledger mechanism for rod making machines

Also Published As

Publication number Publication date
DE2126237A1 (de) 1972-01-13
GB1351130A (en) 1974-04-24
FR2097804A5 (de) 1972-03-03

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