US3645430A - Apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags - Google Patents

Apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags Download PDF

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Publication number
US3645430A
US3645430A US37675A US3645430DA US3645430A US 3645430 A US3645430 A US 3645430A US 37675 A US37675 A US 37675A US 3645430D A US3645430D A US 3645430DA US 3645430 A US3645430 A US 3645430A
Authority
US
United States
Prior art keywords
rollers
sheath
pair
differential
cage
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
US37675A
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English (en)
Inventor
Georges Lagain
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.)
SOFAMECA Sarl
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3645430A publication Critical patent/US3645430A/en
Assigned to SOFAMECA S.A.R.L. reassignment SOFAMECA S.A.R.L. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LAGAIN, GEORGE
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
    • B65B65/00—Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details
    • B65B65/02—Driving gear
    • 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
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/10—Feeding or positioning webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • B65H2511/112—Length of a loop, e.g. a free loop or a loop of dancer rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed

Definitions

  • iiieierenees Cited 1 (115111115, 11 Drawing i iguii'e UNiTED STATES PATENTS 1 2,151,570 3/1939 tim ng 'l he present invention relates to an apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags.
  • the sheath which is unwound from a storage reel, is driven by a first pair of rotary rollers followed by an assembly of fixed and movable rollers of conventional type on which the sheath is wound, and by a second pair of rotary rollers arranged upstream of the welding and cutting jaws, according to the direction of advance of the sheath.
  • this ltnown driving device does not enable a regular advance of the sheath and a constant pulling from the beginning to the end of the reel to be obtained, so that irregularities in the length of the bags result.
  • a device for driving a sheath at variable and automatically adjustable speed is used in a machine for manufacturing plastic bags, in which the sheath driving device comprises, following a reel around which the sheath is wound, a first pair of drive rollers, a series of tired and movable, freely rotating rollers, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, characterized in that the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions of a differential, the cage of which carrying the satellite pinions may be rotated during the displacement of a set of free rollers on which the sheath is wound.
  • the device according to the invention enables the sheath to be advanced in regular manner, i.e., withoutjerlt's, and enables very heavy sheaths to be used in the machine.
  • the single FlGURlE shows a schematic elevational view of an embodiment of the drive device according to the invention.
  • the sheath ll coming from a storage reel 2 is engaged between a first pair of rollers 3, 3a, at least one of which, 33a, is driven by a motor speed regulator l by means of a transmission member 5.
  • the sheath l is directed between a second pair of rollers ll, be, only one of which, fizz, is connected by a transmission member 9 to a motor speed regulator ill
  • the members for controlling the speed of the motor speed regulator il are connected by a shaft ill and a transmission member l2 to a pulley l3 keyed to a shaft Ml carrying at one of its ends a handwheel l5 and at its other end a planetary pinion lid of a differential l7, said planetary pinion to being connected by satellite pinions to a planetary pinion l9 keyed to a shaft
  • the planetary pinions lid, .lda mounted to rotate on axes 2i, Illa unitary with a cage .22 of the differential 117.
  • the shaft 2h one of whose ends is unitary with the planetary pinion l9, carries at its other end a pinion 2.3 meshing with a revcrser pinion 2d unitary with a shaft on which is keyed a pulley 2d which, by means of a transmission 2'7, is connected to a shaft controlling the speed control members of the motor speed regulator d.
  • rollers 7, 2a are mounted to rotate at each of their ends on a support member 29 fixed to an endless chain 3b, mounted on a pair oftoothed wheels Ell, Ella.
  • a boss Jill is fixed to the other edge of one of the endless chains which boss may come into contact with two stop members Zid, 33 n unitary with an endless chain or belt 3 d arranged on a toothed wheel mounted to rotate on the frame: and on a toothed wheel 36 unitary with the cage 22 of the differential H2.
  • the drive device operates as follows:
  • the motor speed regulators 4i and. ill) are set into operation at the same time, but the rollers 3, Zia are only rotated if the rollers 8, be are themselves rotated.
  • a clutch is arranged between the motor speed regulator d and the rollers 3, 3n, as well as between the motor speed regulator lid and rollers it, do.
  • the two clutches which are preferably electromagnetic, are mounted in parallel and are actuated from a single control contactor.
  • the handwheel lid is maneuvered in order to rotate the shaft Ji l and the pulley or toothed wheel ill in one direction or the other and to act, by the transmission l2, on the rotation of the shaft lll. controlling the means for ad justing the motor speed regulator ill.
  • the planetary pinion l6 and pinions ill, lllla are used to rotate cage 22 and the endless chain lid is driven until one of the stop members 3%, 33a comes into contact with the boss 32.
  • the cage Due to the resistant torque opposed by the assembly of fixed and movable rollers, the cage is fixed and the planetary pinion i6 drives pinion li by the satellite pinions lib, tile.
  • the shaft 2% is also driven which transmits its movement by the reverser pinions 23, 24 and the transmission 26, 27 to the shaft 23 for controlling the members for adjust-- ing the motor speed regulator.
  • the satellite pinions ill, llda drive the planetary pinion l9 and the shaft 243 which controls, by transmission 27, the drive of the shaft 28, in order to act on the means for adjusting the motor speed regulator t in order to increase the speed of the rollers 35, do.
  • rollers 7, 7a descend in the direction opposite that of arrow A, until the speed is stabilized, in order to correspond to the normal output of the machine.
  • the satellites lltl that drive the pinion W, the shaft 2i) and, by the transmission 27, the shaft 23 which con trols the members for adjusting the mot-or speed regulator d, in the sense of a reduction in speed or" the rollers 3, do.
  • a device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions on said differential, said cage of said differential carrying the satellite pinions and rotatable during the displacement of a set of free rollers on which the sheath is wound.
  • a device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, said movable rollers being mounted on support means so as to permit their vertical displacement and having an actuator member capable of acting selectively during passage on two stop members fixed at a certain distance from one another on a linearly moving member connected to said cage of said differential, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions of said differential, said cage of said differential carrying the satellite pinions being rotatable during the displacement of a set of free rollers on which the sheath is wound.
  • a drive device as defined in claim 2, wherein the means for supporting the movable rollers comprise two endless chains mounted on two pairs of toothed wheels, two support members carried on one side of said chains in which the ends of said rollers are rotatably mounted, one of said chains carrying on the other side a boss capable of coming into contact with two stop members mounted on endless chain mounted on a pair of toothed wheels, one of said wheels being unitary with said cage of said differential.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)
  • Retarders (AREA)
US37675A 1969-05-20 1970-05-15 Apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags Expired - Lifetime US3645430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6916303A FR2044407A5 (enExample) 1969-05-20 1969-05-20

Publications (1)

Publication Number Publication Date
US3645430A true US3645430A (en) 1972-02-29

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ID=9034300

Family Applications (1)

Application Number Title Priority Date Filing Date
US37675A Expired - Lifetime US3645430A (en) 1969-05-20 1970-05-15 Apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags

Country Status (3)

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US (1) US3645430A (enExample)
DE (1) DE2025683A1 (enExample)
FR (1) FR2044407A5 (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768715A (en) * 1972-05-01 1973-10-30 Bell & Howell Co Planetary differential and speed servo
US4070951A (en) * 1974-06-21 1978-01-31 Packaging Industries, Inc. Web handling apparatus
US5007270A (en) * 1989-11-07 1991-04-16 Wallis Bernard J Web handling apparatus for metal ribbon stock
US5833107A (en) * 1997-03-04 1998-11-10 Ro-An Industries Corporation Apparatus for drawing, a web through a synchronization section of a bag making machine
US6085956A (en) * 1998-08-04 2000-07-11 Quad/Graphics, Inc. Method and apparatus for controlling tension in a web offset printing press

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151570A (en) * 1936-02-27 1939-03-21 Gen Electric Control system
DE1102885B (de) * 1956-12-17 1961-03-23 Siemens Ag Steuerung fuer Mehrmotorenantriebe mit Drehstrommotoren
US3087663A (en) * 1961-04-13 1963-04-30 James K Anderson Apparatus for adjusting printing web tension

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151570A (en) * 1936-02-27 1939-03-21 Gen Electric Control system
DE1102885B (de) * 1956-12-17 1961-03-23 Siemens Ag Steuerung fuer Mehrmotorenantriebe mit Drehstrommotoren
US3087663A (en) * 1961-04-13 1963-04-30 James K Anderson Apparatus for adjusting printing web tension

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3768715A (en) * 1972-05-01 1973-10-30 Bell & Howell Co Planetary differential and speed servo
US4070951A (en) * 1974-06-21 1978-01-31 Packaging Industries, Inc. Web handling apparatus
US5007270A (en) * 1989-11-07 1991-04-16 Wallis Bernard J Web handling apparatus for metal ribbon stock
US5833107A (en) * 1997-03-04 1998-11-10 Ro-An Industries Corporation Apparatus for drawing, a web through a synchronization section of a bag making machine
US6085956A (en) * 1998-08-04 2000-07-11 Quad/Graphics, Inc. Method and apparatus for controlling tension in a web offset printing press

Also Published As

Publication number Publication date
FR2044407A5 (enExample) 1971-02-19
DE2025683A1 (de) 1970-11-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SOFAMECA S.A.R.L.,STATELESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAGAIN, GEORGE;REEL/FRAME:004834/0378

Effective date: 19850614

Owner name: SOFAMECA S.A.R.L., CHAVENAY (YVELINES) 14, RUE HAU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LAGAIN, GEORGE;REEL/FRAME:004834/0378

Effective date: 19850614