US3836089A - Web splicing, unwinding and forwarding apparatus - Google Patents

Web splicing, unwinding and forwarding apparatus Download PDF

Info

Publication number
US3836089A
US3836089A US00342556A US34255673A US3836089A US 3836089 A US3836089 A US 3836089A US 00342556 A US00342556 A US 00342556A US 34255673 A US34255673 A US 34255673A US 3836089 A US3836089 A US 3836089A
Authority
US
United States
Prior art keywords
web
dancer
unwinding
forwarding
splicing
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
US00342556A
Other languages
English (en)
Inventor
C Riemersma
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.)
Procter and Gamble Co
Original Assignee
Procter and Gamble 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 Procter and Gamble Co filed Critical Procter and Gamble Co
Priority to US00342556A priority Critical patent/US3836089A/en
Priority to CA194,450A priority patent/CA1012522A/en
Priority to GB1126174A priority patent/GB1457583A/en
Priority to DE2412435A priority patent/DE2412435A1/de
Priority to NL7403573A priority patent/NL7403573A/xx
Priority to CH369774A priority patent/CH575875A5/xx
Priority to BE142122A priority patent/BE812444A/xx
Priority to FR7409135A priority patent/FR2222294B1/fr
Priority to JP49031397A priority patent/JPS5025968A/ja
Priority to IT20788/74A priority patent/IT1007473B/it
Application granted granted Critical
Publication of US3836089A publication Critical patent/US3836089A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1857—Support arrangement of web rolls
    • B65H19/1873—Support arrangement of web rolls with two stationary roll supports carrying alternately the replacement and the expiring roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/14—Accumulating surplus web for advancing to machine while changing the web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1842—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact
    • B65H19/1852—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact taking place at a distance from the replacement roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • 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
    • B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/463—Splicing splicing means, i.e. means by which a web end is bound to another web end
    • B65H2301/4631—Adhesive tape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/46—Splicing
    • B65H2301/464—Splicing effecting splice
    • B65H2301/46414—Splicing effecting splice by nipping 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
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/21—Accumulators
    • B65H2408/217—Accumulators of rollers type, e.g. with at least one fixed and one movable roller
    • B65H2408/2172—Accumulators of rollers type, e.g. with at least one fixed and one movable roller several cascaded loops of 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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Definitions

  • This invention relates generally to providing apparatus for continuously forwarding web material such as one mill polyethylene into a web consuming apparatus such as a converter for manufacturing disposable diapers. Continuous forwarding is enabled through successively splicing the leading edge of a new roll of web to the trailing edge of a just depleted roll of web.
  • Such an apparatus commonly called an unwind stand, normally includes some means for controlling web tension during steady state operation and, to a degree, during splicing transients and the like.
  • the present invention relates to providing a low tension unwind stand having improved means for causing and controlling increased tension in the web during splicing and other major transients whereby the equipment can be re-stabilized quickly.
  • each new roll In order to continuously supply a web consuming apparatus with web from a succession of rolls of web material each new roll must be spliced to the preceding roll. Desirably, this is done without diminishing the rate of forwarding web to the web consuming apparatus.
  • Such splicing is commonly accomplished by stopping the trailing edge of the just depleted roll while the leading edge of the succeeding roll is spliced to it.
  • Accumulator means defining a variable length looped path for the web are provided between the splicing means and the web forwarding means to store and pay out the web required by the web consuming apparatus during the splicing interval. That is, while the trailing edge of a just depleted roll of web is stopped to perform a splice, web is forwarded to the web consuming apparatus from the accumulator whereby the length of web stored therein is diminished. After the splice is completed, tension in the web acts tangentially on the new roll of web whereby the new roll of web is caused to accelerate.
  • the length of web which must be provided by the accumulator during a splicing operation is dependent on the time required to perform the splice and on the time required for tension in the web to accelerate the new roll to line velocity.
  • Certain web converting processes require that web materials such as distensible thermoplastic films be forwarded under very low tension although the web material is capable of withstanding relatively high tension loads without breaking.
  • An example of such converting operations is the combining of polyethylene film with cellulose pads to make absorbent disposable diapers having a substantially impervious covering. If the plastic film is cut to length while distended, and is joined with a cellulose pad before it returns to'its unstressed length, the film will cause the pad to become distorted.
  • a major object of the invention is providing an improved, low tension, web splicing, unwinding and forwarding apparatus wherein a low level of steady state web tension can be maintained and in which web tension is increased during splicing transients in order to shorten such splicing induced transient intervals.
  • Another major object of the present invention is providing an improved web splicing and forwarding apparatus comprising an accumulator having an underslung, web supported dancer and means responsive to dancer rate-of-descent for preventing slack in the web looped through the accumulator.
  • Yet another major object of the invention is providing an improved web splicing, unwinding and forwarding apparatus comprising an underslung, web supported dancer which apparatus comprises means for normally maintaining a low level of tension in the web and means for increasing web tension during splicing transients, and comprises means responsive to the rate of dancer descent for preventing slack in the web looped through the accumulator.
  • the improved apparatus includes a frame, splicing means, web forwarding means, web unwinding means including means for revolvingly mounting a plurality of rolls of web for unwinding them and braking means for applying a controllable braking force to retard such unwinding.
  • the apparatus further includes a web accumulator means intermediate the web forwarding means and the splicing means.
  • the accumulator means includes a vertically movable underslung web loading dancer assembly and a plurality of idler rollers defining a looped path of variable length for the web, the length of the looped path being inversely related to the displacement of the dancer assembly above the lower end of its range of travel.
  • Means are provided for normally controlling the unwind braking force as a dependent function of dancer elevation to maintain a substantially constant low level of web tension.
  • the improved apparatus may comprise means for maintaining substantially constant dancer loading only throughout a lower range of dancer elevations and means for increasing dancer loading in a predetermined manner with respect to dancer elevations above said lower range.
  • the improved apparatus may comprise means for increasing, in a predetermined manner, unwind brake loading above its normal dancer-elevation-dependent value during periods when the dancer is decending at a rate equal to or greater than a predetermined rate.
  • FIG. 1 is a diagramic fragmentary side elevational view of a web splicing, unwinding and forwarding apparatus embodying the present invention.
  • FIG. 2 is an enlarged scale diagramatic side elevational view of the accumulator portion of the apparatus shown in FIG. 1 having the dancer disposed against the DOWN stop.
  • FIG. 3 is en enlarged scale diagramatic side elevational view of the accumulator of the apparatus of FIG. 1 having the dancer disposed against the UP stop.
  • FIG. 4 is a fragmentary front elevational view of the dancer assembly of the apparatus shown in FIG. 1 taken along line 44 thereof.
  • FIG. 5 is a diagramatic pictorial schematic of the tension control system for the apparatus shown in FIG. 1.
  • FIG. 6 is an enlarged scale view of the dancer operated cam and air pressure regulator shown in FIG. 5 which are used to control unwind braking as a function of dancer elevation in the apparatus shown in FIG. 1.
  • FIG. 7 is a graph showing the dependent relation of regulated brake pressure to dancer displacement from the DOWN stop of the dancer assembly.
  • FIG. 8 is an enlarged fragmentary view of the dancer rate-of-descent sensing mechanism embodied in the tension control system shown in FIG. 5.
  • FIG. 9 is a composite graph showing dancer loading versus dancer elevation, and showing brake-induced web tension versus dancer elevation.
  • FIGS. 1, 2 and 3 there is shown an improved web splicing, unwinding and forwarding apparatus 20 (alternatively referred to as unwind stand 20) which is a preferred embodiment of the present invention comprising frame 21, web forwarding means 22, roll support means 23, unwind braking means 24, web splicing means 25, web accumulator 26, transient dancer loading means 27, and dancer rate-of-descent responsive means 28.
  • unwind stand 20 which is a preferred embodiment of the present invention comprising frame 21, web forwarding means 22, roll support means 23, unwind braking means 24, web splicing means 25, web accumulator 26, transient dancer loading means 27, and dancer rate-of-descent responsive means 28.
  • unwind stand 20 is of such an unwind stand which is configured and adjusted to unwind and forward web from 21 inch diameter rolls of one mill polyethylene, 16 inches wide, at line velocities of up to about 750 feet per minute. Such rolls weigh about 140 pounds and commonly have 3% inch diameter spools. However, it is not intended to thereby limit the scope of the present invention to such sizes and velocity.
  • the present invention is described as improving the performance of unwind stand during splicing induced transients. Although improved performance during splicing induced transients is believed to be a primary benefit of the present invention, the present invention generally improves the overall operation of unwind stand 20.
  • web forwarding means 22 acts to unwind rolls 31 of web material 30 while braking means 24 provides torque to retard such unwinding in order to establish and maintain desired tension in web 30.
  • Web splicing means 25 is provided to splice a new roll of web to a just depleted roll of web so that web can continuously be forwarded by web forwarding means 22 at a substantially constant velocity to downstream apparatus even during splicing transients and the like.
  • Transient dancer loading means 27 enables maintaining a low level of web tension during normal, steady state op eration while providing increased web tension during splicing and other major transients.
  • Such increased tension is provided to quickly accelerate a new roll of web whereby the length of web stored in accumulator 26 can be small as compared to the length that would be required if tension were not increased during such transients.
  • Dancer rate-of-descent responsive means 28 is provided to increase unwind braking torque in a predetermined manner whenever the rate-of-descent of the dancer equals or exceeds a predetermined value. The predetermined manner of increasing braking torque and the predetermined rate-of-descent are selected to prevent the dancer from reaching the DOWN stop which would otherwise precipitate slack in the web..
  • web forwarding means 22 withdraws web stored in web accumulator 26. Following the splicing operation, web forwarding means 22 applies tension through the web which, acting tangentially on the new roll, causes the new roll of web to accelerate until its peripheral velocity equals and then exceeds the forwarding velocity of web 30 passing through web forwarding means 22.
  • the dancer rate-ofdescent responsive means 28 enables doing this as will be described more fully after completing the description of the preferred embodiment of the present invention.
  • Web forwarding means 22, FIG. 1 comprises nip rollers 35, 36 which are so disposed and so configured to form a nip 37 therebetween for engaging web material 30 whereby web can be forwarded to downstream apparatus. Rollers 35 and 36 are driven by means not shown in FIG. 1 to provide the desired web forwarding velocity.
  • Upper and lower roll support means 23, FIG. 1, are provided formounting rolls 31a, 31b of web material 30 so that they are freely rotatable in the unwind direction except when such rotation is retarded by braking means 24.
  • Braking means 24, alternatively referred to as brakes 24, comprises pneumatically actuated brakes which are secured to frame 21 so that they can act, through means not shown, to apply torque to retard unwinding rolls 31a and 31b in the direction indicated.
  • the braking torque provided by brakes 24 is controllable by controlling the pressure of air supplied to them.
  • Web splicing means 25 is provided with idler rollers 40, 41 and 42 for guiding web 30 from roll 31a between splicing rollers 43 and 44.
  • Splicing means is further provided with idler rollers 45, 46 and 47 for guiding a web from roll 31b to between splicing rollers 43 and 44.
  • the splicer is prepared to perform a splice by applying pressure sensitive splicing tape 50 to the transversely extending leading edge of the new roll of web and to secure tape 50 to transversely extending support 51 so that the leading edge 53 of splicing tape 50 extends between splicing rollers 43 and 44.
  • the splicing rollers 43 and 44 are mounted on eccentric axes so that when they are simultaneously rotated, they will press splicing tape 50 against the trailing edge of web 30 from a just depleted roll of web.
  • the means for synchronizing the rotation of splicing rollers 43 and 44 to perform the splice as described is not shown. Suffice it to say that it is believed to be within the range of skill or persons having ordinary skill in the art to provide means for synchronizing the rotation of the splicing rollers. Such means might comprise, for instance, a photo electric detector.
  • rolls of web 31 are alternately forwarded from the upper and lower roll support means 23 to enable web forwarding means 22 to uninterruptedly forward web 30 to downstream apparatus at substantially constant velocity.
  • Accumulator means 26, FIG. 1 is provided intermediate web forwarding means 22 and web splicing means 25 for the purpose of storing a loop of web of sufficient length to permit web forwarding means 22 to uninterruptedly forward web 30 to downstream apparatus even during splicing operations when infeed into the accumulator is momentarily stopped and until the new roll of web is accelerated to line velocity.
  • Another function of the accumulator is to provide means for establishing and maintaining a low level of the tension in web 30 during steady state operation.
  • the web accumulator 26, FIGS. 1, 2 and 3 comprises frame supported, rotatably mounted idler rollers 55, 56 and 57, a vertically movable, underslung dancer assembly 58, and vertically extending guides 65, FIG. 4, secured at their ends to frame 21.
  • the accumulator also comprises two loops of chain 66, two upper sprockets 67, two lower sprockets 68, shafts 69, 70, DOWN stop 61, and UP stop 62.
  • the dancer assembly 58 comprises hollow aluminum dancer idler rollers 59, 60 to reduce the inertia of the dancer. Rollers 59, 60 are rotatably supported at both ends of guide blocks 64. Each guide block 64 is provided with bushing means not shown for telescoping a guide 65 through it. Tie bar 63, disposed within dancer idler roller 59, is non-rotatably secured to guide blocks 64 to increase the structural integrity of dancer assembly 58. Because guides 65 extend vertically,
  • dancer assembly 58 has a vertically extending range of travel. As also indicated in FIG. 4, means is provided for securing a chain to each end of dancer assembly 58 which chain is looped about upper sprockets 67 and lower sprockets 68, FIGS. 2 and 3, mounted on shafts 69, respectively. Shafts 69, 70 are rotatably secured to frame 21. The lower sprockets 68 are non-rotatably secured to shaft 70.
  • yoke 72 will be described in conjunction with describing transient dancer loading means 27, and the functions associated with rotating shaft 70 will be described in conjunction with describing the control of unwind braking means 24 and in describing dancer rate-of-descent responsive means 28.
  • a storage loop of web 30 comprising two nested Vs is formed by threading web 30 through accumulator 26 as shown in FIG. 1.
  • the dancer assembly is operable between a DOWN stop 61 and an UP stop 62 which stops are secured to frame 21 and are provided with suitable cushioning means not shown.
  • DOWN and UP stops 61 and 62 respectively are spaced to provide a vertical range of travel for dancer assembly 68 of about forty inches for use with 21 inch diameter rolls of polyethylene as described hereinbefore.
  • FIGS. 2 and 3 One side of two substantially identical sides of the transient dancer loading means 27 which is incorporated in the preferred embodiment of the improved unwind stand 20 is shown in FIGS. 2 and 3.
  • Each side of means 27 comprises a tension spring 73 intermediate frame 21 and the smaller end of a headed rod 74 so that spring 73 and rod 74 depend from frame 21.
  • Yoke 72 is provided with a clearance aperture through which rod 74 will freely pass except for its headed end.
  • a length L of rod 74 extends below yoke 72.
  • the dancer imparted load on the web hereinafter the dancer load, on web 30 will essentially be the weight of dancer assembly 58 through stroke L and will be the sum of the weight of dancer assembly 58 and tension in springs 73 through the remainder of the dancers range of travel.
  • the means for controlling braking torque applied by brakes 24 to retard unwinding the rolls 31a, 31b of web 30 is shown in the diagrammatic schematic FIG. 5.
  • Pressurized air is received from a suitable source therefore to pressurize tubing 79 to a pressure of about pounds.
  • Cam 80, secured on shaft 70a is driven by shaft 70 through a suitable gearbox for synchronized rotation therewith.
  • Cam 80 operates air pressure regulator 81 through a follower mechanism as better illustrated in enlarged scale in FIG. 6.
  • cam 80 is ground and indexed with dancer elevation to provide the regulated pressure for the unwind brakes 24 versus the dancer elevation as graphed in FIG. 7.
  • maximum pressure is applied to brakes 24 through tubing 82 between the zero and three inch levels of dancer elevation as measured from DOWN stop 61.
  • the pressure is rapidly reduced between the 3 and 7 inch levels to a value of 8 p.s.i.
  • pressure is gradually reduced from 8 p.s.i. to O p.s.i. O p.s.i. air is applied to tubing 82 through regulator 81 while the dancer is between the l2 and 40 inch levels.
  • Dancer rate-of-descent responsive means 28 is shown, FIG. 5, to comprise winching sheave 85, cable 86, bracket 87, air cylinder 88, tension springs 89, 90, tubing 91, adjustable bleed orifice 92, pressure operated switch 93, solenoid valve 94, and electric wires 95, 96 and 97. Also, the discharge port of solenoid valve 94 is connected to tubing 82 through an adjustable orifice 98 and tubing 99.
  • cylinder 88 is shown in enlarged scale with its piston rod connected by cable 86 to winching sheave 85 so that upward travel of the dancer assembly 58 will extend the piston rod and, upon downward movement of the dancer assembly, springs 89 and 90 will act through bracket 87 to retract the piston of the air cylinder.
  • air is drawn into tubing 91 through bleed orifice 92 during upward movement of the dancer assembly which air is pressurized within cylinder 88 upon downward movement of the dancer assembly 58.
  • the pressure developed by cylinder 88 is a function of the dancer rate-of-descent and the adjustment of bleed orifice 92. Because switch 93 is only operated to its closed position by a higher than ambient pressure, it is closed only when the dancer rate-of-descent equals or exceeds a predetermined value. Bleed orifice 92 is used to adjust the predetermined rate.
  • switch 93 Upon closing of switch 93, electric power is applied from a suitable source to solenoid valve 94 which then ports unregulated pressurized air from tubing 79 to tubing 82 through tubing 99 and orifice 98 and thence to brakes 24 whereby increased braking is effected whenever the dancer rateof-descent equals or exceeds the predetermined value.
  • Switch 93 will open when the dancers rate-of-descent decreases to below the predetermined rate and the pressure in tubing 91 bleeds down through bleed orifice 92.
  • Air pressure regulator 81 is a continuous bleed type regulator which acts to bleed its discharge line to ambient whenever the pressure in the discharge line exceeds the pressure which the regulator is positioned for. Thus, upon the opening of switch 93 causing solenoid valve 94 to be degenerized, valve 94 closes. Then, with no air applied to tubing 82 through valve 94, the pressurized air in tubing 82 will bleed through regulator 81 whereby brakes 24 are depressurized to whatever pressure regulator 81 is positioned for by cam 80 (i.e., the elevation of dancer assembly 58).
  • the operation of the improved unwind stand embodying the present invention can be understood best by describing the sequence of events which occur during an interval from just after stand 20 has stabilized after a splicing event until steady state operation is achieved again after the next splicing event.
  • the following description describes splicing roll 31b, FIG. 1, to roll 31a with the understanding that rolls disposed in the upper and lower roll supports will be spliced alternately.
  • curves 100, 101, and 102 show web tension versus dancer elevation for 21, 10, and 3% inch diameter rolls respectively which curves reflect the effect of regulating brake pressure as a function of dancer elevation, FIG. 7.
  • dancer load curve 103 reflects the fact that the dancer load consists only of the dancer weight between the 0 and 12 inch levels of the dancer travel and is increased above the 12 inch level due to the elongation of springs 73 as described hereinbefore.
  • curves 100 and 103 The intersection between curves 100 and 103, FIG. 9, indicates that dancer 58 of unwind stand 20 is balanced with the dancer at about the 7 inch level because web tension is then equal to dancer load.
  • the intersections between curve 103 and curves 101 and 102 further indicate that as a roll of web is depleted and its diameter decreases to the 3%. inch spool diameter, the dancer will rise to about the eleven inch level in order to reduce regulated braking pressure to maintain a substantially constant low level of tension in the web of about 2 /2 pounds.
  • the high levels of web tension that are induced by brakes 24 when the dancer is in the 0 to 7 inch range of travel are provided primarily to quickly stop high inertia rolls of web in the event nip rollers 35, 36 are quickly slowed or stopped.
  • this range of dancer travel is operative during start-up and will become operative if the dancer moves to below the 7 inch level during transients such as post-splice stabilization.
  • the brake control system functions substantially the same during such events as during a-quick stop by applying increased regulated air pressure to brakes 24 as a function of dancer elevation.
  • An improved web splicing, unwinding and forwarding apparatus for unwinding web from a succession of supply rolls and forwarding web uninterruptedly to downstream apparatus at substantially constant ve locity under substantially constant tension
  • said apparatus including a frame, splicing means, web forwarding means, unwinding means including means for revolvingly mounting a plurality of said rolls for unwinding them and braking means for applying a controllable braking force to retard said unwinding, web accumulator means intermediate said forwarding means and said splicing means, said accumulator means including a vertically moveable underslung web loading dancer assembly and a plurality of idler rollers defining a looped path of variable length for said web, the length of said path being inversely related to the displacement of said dancer assembly above the lower end of its range of travel, and means for normally controlling said braking force as a dependent function of dancer elevation to maintain substantially constant web tension, the improvement comprising means for maintaining substantially constant dancer loading only throughout a lower range of dancer elevation and means for
  • An improved web splicing, unwinding and forwarding apparatus for unwinding web from a succession of supply rolls and forwarding web uninterruptedly to downstream apparatus at substantially constant velocity under substantially constant tension
  • said apparatus including a frame, splicing means, web forwarding means, unwinding means including means for revolvingly mounting a plurality of said rolls for unwinding them and braking means for applying a controllable braking force to retard said unwinding, web accumulator means intermediate said forwarding means and said splicing means, said accumulator means including a vertically moveable underslung web loading dancer assembly and a plurality of idler rollers defining a looped path of variable length for said web, the length of said path being inversely related to the displacement of said dancer assembly above the lower end of its range of travel, and means for normally controlling said braking force as a dependent function of dancer elevation to maintain substantially constant web tension, the improvement comprising means for maintaining substantially constant dancer loading only throughout a lower range of dancer elevation and means for increasing dancer
  • An improved web splicing, unwinding and forwarding apparatus for unwinding web from a succession of supply rolls and forwarding web uninterruptedly to downstream apparatus at substantially constant velocity under substantially constant tension, said apparatus including a frame, splicing means, web forwarding means, unwinding means including means for revolvingly mounting a plurality of said rolls for unwinding them and braking means for applying a controllable braking force to retard said unwinding, web accumulator means intermediate said forwarding means and said splicing means, said accumulator means including a vertically moveable underslung web loading dancer assembly and a plurality of idler rollers defining a looped path of variable length for said web, the length of said path being inversely related to the displacement of said dancer assembly above the lower end of its range of travel, and means for normally controlling said braking force as a dependent function of dancer elevation to maintain substantially constant web tension, the improvement comprising means for increasing, in a predetermined manner, brake loading above its normal dancer-elevation-dependent value
  • An improved web splicing, unwinding and, forwarding apparatus for unwinding web from a succession of supply rolls and forwarding web uninterruptedly to downstream apparatus at substantially constant velocity under substantially constant tension
  • said apparatus including a frame, splicing means, web forwarding means, unwinding means including means for revolvingly mounting a plurality of said rolls for unwinding them and braking means for applying a controllable braking force to retard said unwinding, web accumulator means intermediate said forwarding means and said splicing means, said accumulator means including a vertically moveable underslung web loading dancer assembly and a plurality of idler rollers defining a looped path of variable length for said web, the length of said path being inversely related to the displacement of said dancer assembly above the lower end of its range of travel, and means for normally controlling said braking force as a dependent function of dancer elevation to maintain substantially constant web tension, the improvement comprising means for increasing, in a predetermined manner, brake loading above its normal dancer-elevation-

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US00342556A 1973-03-19 1973-03-19 Web splicing, unwinding and forwarding apparatus Expired - Lifetime US3836089A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00342556A US3836089A (en) 1973-03-19 1973-03-19 Web splicing, unwinding and forwarding apparatus
CA194,450A CA1012522A (en) 1973-03-19 1974-03-08 Web splicing, unwinding and forwarding apparatus
GB1126174A GB1457583A (en) 1973-03-19 1974-03-13 Web handling apparatus
DE2412435A DE2412435A1 (de) 1973-03-19 1974-03-15 Zufuehrungsvorrichtung zum abwickeln und zum ununterbrochenen zufuehren von bahnmaterial
NL7403573A NL7403573A (hu) 1973-03-19 1974-03-18
CH369774A CH575875A5 (hu) 1973-03-19 1974-03-18
BE142122A BE812444A (fr) 1973-03-19 1974-03-18 Appareil pour l'amenee a vitesse constante d'une bande continue sous tension sensiblement constante
FR7409135A FR2222294B1 (hu) 1973-03-19 1974-03-18
JP49031397A JPS5025968A (hu) 1973-03-19 1974-03-19
IT20788/74A IT1007473B (it) 1973-03-19 1974-04-08 Apparecchiatura perfezionata per giuntare srotolare e far avanzare un nastro

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00342556A US3836089A (en) 1973-03-19 1973-03-19 Web splicing, unwinding and forwarding apparatus

Publications (1)

Publication Number Publication Date
US3836089A true US3836089A (en) 1974-09-17

Family

ID=23342339

Family Applications (1)

Application Number Title Priority Date Filing Date
US00342556A Expired - Lifetime US3836089A (en) 1973-03-19 1973-03-19 Web splicing, unwinding and forwarding apparatus

Country Status (10)

Country Link
US (1) US3836089A (hu)
JP (1) JPS5025968A (hu)
BE (1) BE812444A (hu)
CA (1) CA1012522A (hu)
CH (1) CH575875A5 (hu)
DE (1) DE2412435A1 (hu)
FR (1) FR2222294B1 (hu)
GB (1) GB1457583A (hu)
IT (1) IT1007473B (hu)
NL (1) NL7403573A (hu)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995791A (en) * 1975-07-09 1976-12-07 Package Machinery Company Continuous web supply system
US4065067A (en) * 1975-09-30 1977-12-27 Martinez D Manuel Torres System for automatic coupling or splicing of bobbins, submitting a strip to a continuous feed process for paper manufacturing machines
FR2438615A1 (fr) * 1978-10-09 1980-05-09 Giampiero Giusti Dispositif automatique pour amortir et compenser la force de traction exercee sur une bande de materiau en mouvement
US4281803A (en) * 1979-11-19 1981-08-04 Molins Machine Company, Inc. Splicer control
FR2510085A1 (fr) * 1981-07-27 1983-01-28 Sireix Georges Devidoir pour machine de formage en continu de profiles tubulaires
GB2160180A (en) * 1984-04-24 1985-12-18 Procter & Gamble Web unwind-splicer apparatus and concomitant method
US5050812A (en) * 1990-12-05 1991-09-24 Sterling Envelope Corporation Dual-envelope making machine and method of using
US5887816A (en) * 1997-07-28 1999-03-30 Accra-Wire Controls Inc. Dereeler for selectively feeding coiled stock into an associated fabricating machine
US6024319A (en) * 1997-04-09 2000-02-15 Sumitomo Electric Industries, Ltd. Tension control apparatus
US20030209629A1 (en) * 2002-05-10 2003-11-13 Tsugio Hirata Web splicing method and web splicing apparatus
US6676062B1 (en) * 1999-06-01 2004-01-13 Honigmann Industrielle Elektronik Gmbh Device for discharging webs
WO2005054101A2 (de) * 2003-12-01 2005-06-16 Koenig & Bauer Aktiengesellschaft Rollenwechsler und verfahren zur durchführung eines fliegenden rollenwechsels
US20050139713A1 (en) * 2003-11-24 2005-06-30 Kimberly-Clark Worldwide, Inc. System and process for controlling the deceleration and acceleration rates of a sheet material in forming absorbent articles
US20060207716A1 (en) * 2005-03-15 2006-09-21 Uwe Schneider Apparatus for reducing downtime in web processes
CN102826405A (zh) * 2008-09-18 2012-12-19 蒋超 一种一次性卫生用品生产线的供料机构
US20130056576A1 (en) * 2011-02-25 2013-03-07 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US20130146410A1 (en) * 2011-12-13 2013-06-13 Joy Mm Delaware, Inc. Swinging sheave bracket with force control
CN104828613A (zh) * 2015-04-21 2015-08-12 太阳机械股份有限公司 多层蓄纸装置
US9283683B2 (en) 2013-07-24 2016-03-15 Curt G. Joa, Inc. Ventilated vacuum commutation structures
US9289329B1 (en) 2013-12-05 2016-03-22 Curt G. Joa, Inc. Method for producing pant type diapers
CN104284854B (zh) * 2012-04-27 2016-06-01 宝洁公司 用于在被喂送穿过储料器的幅材中预防褶皱的方法和系统
US9670021B2 (en) 2014-08-28 2017-06-06 The Procter & Gamble Company Mandrel
US9919887B2 (en) 2014-08-28 2018-03-20 The Procter & Gamble Company Web material unwind stand
US9926160B2 (en) 2014-08-28 2018-03-27 The Procter & Gamble Company Robotic unwind stand
US9969587B2 (en) 2014-08-28 2018-05-15 The Procter & Gamble Company Web material unwind apparatus
US20180362280A1 (en) * 2017-06-20 2018-12-20 Fameccanica.Data S.P.A. Unwinding assembly and method for automatically loading reels into an unwinding assembly
US10167156B2 (en) 2015-07-24 2019-01-01 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
EP3590877A1 (en) * 2018-07-02 2020-01-08 OCE Holding B.V. Dancer suspension assembly for a roll-to-roll printer
US11325801B2 (en) 2015-10-13 2022-05-10 Curt G. Joa, Inc. Disposable product assembly systems and methods
US11745970B1 (en) * 2023-03-03 2023-09-05 Elisa M. Duncan Automatic sleeving splicer and methods of making and using the same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8206711A1 (es) * 1981-10-28 1982-08-16 Torres Martinez M Mejoras introducidas en los sistemas de fabricacion de car- ton ondulado
IT8520717V0 (it) * 1985-02-06 1985-02-06 Meschi Luciano Dispositivo di immagazzinamento e rilascio di materiale in striscia di carta
JPH0714280Y2 (ja) * 1988-07-28 1995-04-05 三菱重工業株式会社 紙継装置の張力制御装置
DE68926229T2 (de) * 1989-01-25 1996-10-02 Mitsubishi Heavy Ind Ltd Verbindungssystem für Bahnen
JPH0678139B2 (ja) * 1990-04-13 1994-10-05 エス・ケイエンジニアリング株式会社 ウェブ自動継ぎ装置
US5098029A (en) * 1990-06-01 1992-03-24 Eastman Kodak Company Apparatus and method for minimizing web cinching during unwinding of rolls of web materials of indeterminate length
IT1309358B1 (it) * 1999-05-06 2002-01-22 Pfm S P A Dispositivo per la giunzione di film da imballaggio per macchineconfezionatrici del tipo flow-pack
CN102502300B (zh) * 2008-09-18 2014-06-04 蒋春花 一种一次性卫生用品生产线的供料机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024157A (en) * 1958-08-22 1962-03-06 Congoleum Nairn Inc Web splicer
US3305189A (en) * 1964-12-21 1967-02-21 Butler Web supply apparatus
US3414208A (en) * 1966-09-02 1968-12-03 Jr Richard A Butler Apparatus for controlling the unwinding of web
US3645463A (en) * 1969-10-06 1972-02-29 Champion Paper Products Co Web-splicing apparatus
US3669375A (en) * 1969-03-21 1972-06-13 Eastman Kodak Co Web or strip material handling apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024157A (en) * 1958-08-22 1962-03-06 Congoleum Nairn Inc Web splicer
US3305189A (en) * 1964-12-21 1967-02-21 Butler Web supply apparatus
US3414208A (en) * 1966-09-02 1968-12-03 Jr Richard A Butler Apparatus for controlling the unwinding of web
US3669375A (en) * 1969-03-21 1972-06-13 Eastman Kodak Co Web or strip material handling apparatus
US3645463A (en) * 1969-10-06 1972-02-29 Champion Paper Products Co Web-splicing apparatus

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995791A (en) * 1975-07-09 1976-12-07 Package Machinery Company Continuous web supply system
US4065067A (en) * 1975-09-30 1977-12-27 Martinez D Manuel Torres System for automatic coupling or splicing of bobbins, submitting a strip to a continuous feed process for paper manufacturing machines
FR2438615A1 (fr) * 1978-10-09 1980-05-09 Giampiero Giusti Dispositif automatique pour amortir et compenser la force de traction exercee sur une bande de materiau en mouvement
US4281803A (en) * 1979-11-19 1981-08-04 Molins Machine Company, Inc. Splicer control
FR2510085A1 (fr) * 1981-07-27 1983-01-28 Sireix Georges Devidoir pour machine de formage en continu de profiles tubulaires
GB2160180A (en) * 1984-04-24 1985-12-18 Procter & Gamble Web unwind-splicer apparatus and concomitant method
US4676447A (en) * 1984-04-24 1987-06-30 The Procter & Gamble Company Web unwind-splicer apparatus
US5050812A (en) * 1990-12-05 1991-09-24 Sterling Envelope Corporation Dual-envelope making machine and method of using
US6024319A (en) * 1997-04-09 2000-02-15 Sumitomo Electric Industries, Ltd. Tension control apparatus
US5887816A (en) * 1997-07-28 1999-03-30 Accra-Wire Controls Inc. Dereeler for selectively feeding coiled stock into an associated fabricating machine
US6676062B1 (en) * 1999-06-01 2004-01-13 Honigmann Industrielle Elektronik Gmbh Device for discharging webs
EP1364897A1 (en) * 2002-05-10 2003-11-26 Zuiko Corporation Web splicing method and web splicing apparatus
US20030209629A1 (en) * 2002-05-10 2003-11-13 Tsugio Hirata Web splicing method and web splicing apparatus
US6886772B2 (en) 2002-05-10 2005-05-03 Zuiko Corporation Web splicing method and web splicing apparatus
US20050098677A1 (en) * 2002-05-10 2005-05-12 Tsugio Hirata Web splicing method and web splicing apparatus
US7458540B2 (en) * 2003-11-24 2008-12-02 Kimberly-Clark Worldwide, Inc. System and process for controlling the deceleration and acceleration rates of a sheet material in forming absorbent articles
US20050139713A1 (en) * 2003-11-24 2005-06-30 Kimberly-Clark Worldwide, Inc. System and process for controlling the deceleration and acceleration rates of a sheet material in forming absorbent articles
WO2005054101A3 (de) * 2003-12-01 2005-08-04 Koenig & Bauer Ag Rollenwechsler und verfahren zur durchführung eines fliegenden rollenwechsels
US20070102564A1 (en) * 2003-12-01 2007-05-10 Anton Loffler Roll changer and method for carrying out a flying roll change
WO2005054101A2 (de) * 2003-12-01 2005-06-16 Koenig & Bauer Aktiengesellschaft Rollenwechsler und verfahren zur durchführung eines fliegenden rollenwechsels
US20090050731A1 (en) * 2003-12-01 2009-02-26 Anton Loffler Methods for carrying out a flying reel change
CN100595117C (zh) * 2003-12-01 2010-03-24 赛鲁迪公司 卷筒更换装置和实施快速更换卷筒的方法
US20060207716A1 (en) * 2005-03-15 2006-09-21 Uwe Schneider Apparatus for reducing downtime in web processes
US8910689B2 (en) 2005-03-15 2014-12-16 The Procter & Gamble Company Apparatus for reducing downtime in web processes
CN102826405A (zh) * 2008-09-18 2012-12-19 蒋超 一种一次性卫生用品生产线的供料机构
CN102826405B (zh) * 2008-09-18 2015-06-10 江西理工大学 一种一次性卫生用品生产线的供料机构
US20130056576A1 (en) * 2011-02-25 2013-03-07 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US9907706B2 (en) 2011-02-25 2018-03-06 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US9566193B2 (en) * 2011-02-25 2017-02-14 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US20130146410A1 (en) * 2011-12-13 2013-06-13 Joy Mm Delaware, Inc. Swinging sheave bracket with force control
US9221651B2 (en) * 2011-12-13 2015-12-29 Joy Mm Delaware, Inc. Swinging sheave bracket with force control
CN104284854B (zh) * 2012-04-27 2016-06-01 宝洁公司 用于在被喂送穿过储料器的幅材中预防褶皱的方法和系统
US9283683B2 (en) 2013-07-24 2016-03-15 Curt G. Joa, Inc. Ventilated vacuum commutation structures
US9289329B1 (en) 2013-12-05 2016-03-22 Curt G. Joa, Inc. Method for producing pant type diapers
US9919887B2 (en) 2014-08-28 2018-03-20 The Procter & Gamble Company Web material unwind stand
US9731933B2 (en) 2014-08-28 2017-08-15 The Procter & Gamble Company Mandrel
US9670021B2 (en) 2014-08-28 2017-06-06 The Procter & Gamble Company Mandrel
US9926160B2 (en) 2014-08-28 2018-03-27 The Procter & Gamble Company Robotic unwind stand
US9969587B2 (en) 2014-08-28 2018-05-15 The Procter & Gamble Company Web material unwind apparatus
CN104828613A (zh) * 2015-04-21 2015-08-12 太阳机械股份有限公司 多层蓄纸装置
US10167156B2 (en) 2015-07-24 2019-01-01 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
US10494216B2 (en) 2015-07-24 2019-12-03 Curt G. Joa, Inc. Vacuum communication apparatus and methods
US10633207B2 (en) 2015-07-24 2020-04-28 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
US11325801B2 (en) 2015-10-13 2022-05-10 Curt G. Joa, Inc. Disposable product assembly systems and methods
US20180362280A1 (en) * 2017-06-20 2018-12-20 Fameccanica.Data S.P.A. Unwinding assembly and method for automatically loading reels into an unwinding assembly
US10822190B2 (en) * 2017-06-20 2020-11-03 Fameccanica.Data S.P.A. Unwinding assembly and method for automatically loading reels into an unwinding assembly
US11066264B2 (en) * 2017-06-20 2021-07-20 Fameccanica.Data S.P.A. Method for automatically replacing reels in an unwinding assembly and relative unwinding assembly
EP3590877A1 (en) * 2018-07-02 2020-01-08 OCE Holding B.V. Dancer suspension assembly for a roll-to-roll printer
US11745970B1 (en) * 2023-03-03 2023-09-05 Elisa M. Duncan Automatic sleeving splicer and methods of making and using the same

Also Published As

Publication number Publication date
NL7403573A (hu) 1974-09-23
DE2412435A1 (de) 1974-10-03
GB1457583A (en) 1976-12-08
CH575875A5 (hu) 1976-05-31
CA1012522A (en) 1977-06-21
FR2222294A1 (hu) 1974-10-18
JPS5025968A (hu) 1975-03-18
BE812444A (fr) 1974-09-18
IT1007473B (it) 1976-10-30
FR2222294B1 (hu) 1977-06-17

Similar Documents

Publication Publication Date Title
US3836089A (en) Web splicing, unwinding and forwarding apparatus
EP0949175B1 (en) A unit for controlling the tension of an outgoing web of material
US4100012A (en) Driven nip roll splicer
EP0094631B1 (en) Webbing system
US4917327A (en) Tape dispenser
US3365143A (en) Web tension regulator
US3083602A (en) Precise web metering device
EP0329830B1 (en) Web tensioning apparatus
FI60174C (fi) Anordning foer separering av av haollarbandrullar uppburna och fjaellikt lagrade ventilpaosar och foer matning av de separerade paosarna till fyllningsmaskiner
US3568944A (en) Winding machine
US3491963A (en) Thread delivery mechanism
US3974948A (en) Web tension control device
US3933322A (en) Method and apparatus for the unwinding of bands
US3250488A (en) Braking and tension roll
US3618870A (en) Tension control apparatus
US3630463A (en) Web-tension control apparatus
US4281803A (en) Splicer control
US3625446A (en) Fabric dispenser
US4337904A (en) Web tension control method and apparatus
US3889895A (en) Web-tension sensing and control apparatus
JPH0648627A (ja) 張力制御装置及びその方法
US3777995A (en) Thread winding device
GB1225008A (en) Improvements in unwinding mechanisms
US3559862A (en) Drag wipe
EP0485592B1 (en) Apparatus and method for minimizing web cinching during unwinding of rolls of web materials of indeterminate length