US3779138A - Curl corrector apparatus for operating on a continuous web - Google Patents

Curl corrector apparatus for operating on a continuous web Download PDF

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Publication number
US3779138A
US3779138A US00233511A US3779138DA US3779138A US 3779138 A US3779138 A US 3779138A US 00233511 A US00233511 A US 00233511A US 3779138D A US3779138D A US 3779138DA US 3779138 A US3779138 A US 3779138A
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US
United States
Prior art keywords
web
rods
curl
corrector
pairs
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00233511A
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English (en)
Inventor
H Lindstaedt
E Webb
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.)
Masson Scott Thrissell Engineering Ltd
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Masson Scott Thrissell Engineering Ltd
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Publication date
Application filed by Masson Scott Thrissell Engineering Ltd filed Critical Masson Scott Thrissell Engineering Ltd
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Publication of US3779138A publication Critical patent/US3779138A/en
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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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/34—Apparatus for taking-out curl from webs

Definitions

  • PATENTEB UElH 81973 sum u or a ⁇ CURL CORRECTOR APPARATUS FOR OPERATING ON A CONTINUOUS WEB
  • This invention relates to curl corrector apparatus for operating on continuous travelling webs of paper, cardboard or like material. When such material is unwound from a reel, it has an inherent tendency to curl in the same direction as it has been previously wound, and this tendency becomes particularlyapparent when the material is cut into individual sheets.
  • Previously proposed curl corrector apparatus comprises a rotatable bar of comparatively small diameter over which, the web is deflected in the opposite sense to its tendency to curl.
  • the curl corrector rod is normally provided with support rolls on its side remote from the web to reduce bending of the rod.
  • the sense in which the reel is unwound and consequently the direction of curl of the web may be in either direction according to the number of previous occasions on which the web has been reeled during preliminary processing.
  • the known curl corrector apparatus can, however, only deal with curl in one direction and so it is necessary for a reel with the opposite direction of curl to be rewound before that curl corrector apparatus can be used.
  • a curl corrector apparatus for operating on a continuous travelling web of paper, cardboard or like material, comprises two similar curl corrector rods mounted on opposite sides of the path of the web between two pairs of web guide rollers and displaceable transversely to the path of the web, so that the curl corrector rods are respectively capable of deflecting the web to opposite sides of the straight line path between the pairs of guide rollers, for correction of curl in either direction.
  • the two curl corrector rods may be rotatably carried by a common mounting element at each end displaceable transversely to the path of the web.
  • the common mounting elements may also carry two pairs of support rolls, each pair being arranged side by side and contacting the curl corrector rod on its side away from the web.
  • the mounting elements are guided in their transverse displacement so that the angle formed by the deflected path of the web is always substantially bisected by the plane which passes through the axis of the curl corrector rod which is deflecting the web and passes equidistantly between its support rolls.
  • the mounting elements may be guided by means of a pivotal linkage comprising, for each mounting element, a pair of non-parallel swinging arms pivoted at one of their ends at spaced positions on a fixed part of the apparatus adjacent to one of the pairs of guide rollers, and pivoted at their other ends at spaced positions on the respective mounting element.
  • the two mounting elements may each be formed by a pivotal arm which is pivoted at one endto a fixed part of the apparatus adjacent to one of the pairs of guide rollers and carries one end of each of the two curl corrector rods at its other end, the support rolls being carried by the pivotal arms through links which are pivoted to the arms on the axes of the respective curl corrector rods and which are connected by further links to spaced pivots on the fixed part.
  • the mounting elements may be guided on rails extending transversely to the straight line path between the pairs of guide rollers.
  • Means may be provided for urging the two curl corrector rods against one another, so that the one which is not acting as a curl corrector at any given time will serve as an additional support roll! for the one which is so acting.
  • FIG. 1 is a diagrammatic vertical section through a curl corrector appararus
  • FIG. 2 is a similar section through a second form of apparatus
  • FIG. 3 is a similar view of a third embodiment
  • FIG. 4 is a similar view of a fourth embodiment
  • FIG. 5 is a partial underneath plan view of the embodiment of FIG. 4, and
  • FIG. 6 is a diagrammatic vertical section through a further embodiment.
  • the web W is drawn from a reel (not shown) to the left hand side of the figure, passes between a pair of guide rolls 10,1 I mounted in a fixed part 12 of the apparatus and is drawn off be tween a further pair of guide rolls 13,14 mounted on the fixed part 12. From there the web is directed to a transverse cutting apparatus (not shown).
  • a pair of rotatable circular-section curl corrector rods 16,17 are mounted at their respective ends in a pair of vertical plate-like mounting elements 18, of which only one is visible in FIG. 1. It is shown in one curl-correcting position in full lines and in alternative positions in broken lines.
  • Each curl corrector rod 16,17 is supported by a respective pair of backing or support rolls 19,20, mounted so as to contact the respective curl corrector rod on its side remote from the web W.
  • Each pair of support rolls 19,20 is formed by a series of pairs of short aligned rolls in known manner, each individual pair of rolls being mounted in a respective bracket 191,201.
  • the brackets 191,201 are mounted on transverse beams 192,202 secured at their ends to the plate-like mounting elements 18.
  • the curl corrector rods 16,17 are not positively located in the mounting elements 18 but have limited freedom to float laterally.
  • Spherical ball bearing supports (not shown) at'each end'confine the rods axially.
  • Each of the rods 16,17 is prevented from falling out of place by the other rod and by its support rolls.
  • Each of the plate-like elements 18 is supported at 25,26 at the ends of a pair of non-parallel pivoted arms 21,22 whose other ends are pivoted at 23,24 respectively on the fixed part 12 of the apparatus.
  • the spacing between the pivots 25,26 of the arms 21,22 on the plates 18 is greater than the spacing between their pivots 23,24 on the part 12;, so that the plane 27 which passes through the axes of the curl corrector rods 16,17 and is equidistant from the rollers of the respective pairs 19,20 always bisects the angle made by the web W as it is deflected by either of the curl corrector rods 16,17.
  • a leadscrew actuator 15 having a protective bellows 151 is connected to each of the plate-like elements 18 for displacing them transversely to the web W.
  • FIG. 2 is generally similar to that of FIG. 1 except that the two curl corrector rods 16,17 are mounted at each end in one of a pair of common pivoted arms 30, only one of which is visible.
  • the arms 30 are pivoted on a horizontal axis 37 on the fixed part 12, midway between the axis 35,36 of the guide rollers 13,14.
  • the support rolls 19,20 are carried by the arms 30 through links 31,32 which are pivoted on the arms 30 coaxially with the curl corrector rods 16,17.
  • the ends of the links 31,32 remote from the arms 30 are pivotally connected at 37,38 to further links 33,34 pivoted on the fixed part 12 on the axes 35,36 of the guide rollers 13,14. 7
  • each link 31,32 i.e. the distance between the axis of the rod 16 and pivot 37 and the distance between the axis of rod 17 and pivot 38
  • the distance between the pivot axes of each link 31,32 is greater than the distance betweenthe axis 35,36 of the respective link 33,34 and the pivot axis 37 of the arm 30, so that as in the previous embodiment the angle formed by the deflected web W will always be bisected by the plane which passes through the curl corrector rod 16 or 17 currently in use and which also passes equidistantly between the support rolls of that rod.
  • the lower curl corrector rod 16 and its support rolls 19 are mounted at their respective ends in plate-like mounting elements 181 which are mounted on pivoted arms 21,22 as in the embodiment of FIG. 1.
  • the upper curl corrector rod 17 and its support rolls 20 are mounted at their ends in plates 182 slidable in the mounting elements 181 parallel to the length of the latter, i.e. transversely to the web W.
  • Upper and lower jaws 41,42 having a common pivot 43 on the plate-like element 181, are connected respectively to the slidable plate 182 and to the mounting element 181.
  • the jaws 41,42 can be opened and closed by a diaphragm actuator 44. They are opened for insertion of the web W and may be subsequently closed so that the rods 16,17 are urged against one another and the one which is at any time not acting as a curl corrector will serve as a further support roller for the one that is so acting. Similar means may be provided in the embodiments of FIGS. 1 and 2 for urging the curl corrector rods 16,17 against one another for the same purpose.
  • the curl corrector rods 16,17 are mounted in plate-like mounting elements 183 which are formed in two parts 184,185, hinged together at 45. Relative pivotal movement of the two parts 184,185 is effected by a diaphragm actuator 46. Opening movement, for introduction of the web W, is limited by an end stop 47.
  • the gap between the rods 16,17 may be greater than the thickness of the web W, or the rods may be urged together so that the one supports the other.
  • FIG. 6 where the corrector rods 16,17 are mounted in a carriage 51 which spans rails 52 each side of the web path and perpendicular thereto mid-way between the guide roll pairs 10,11 and 13,14.
  • the end plates 186 of the carriage form the mounting elements and have wheels or sliding shoes 53 that co-operate with the rails 51.
  • a curl corrector apparatus for operating on a continuous travelling web of paper, cardboard or like material between two pairs of web guide rollers, comprising two similar curl corrector rods, mounting means for said rods for maintaining them on opposite sides of the path of the web between said pairs of web guide rollers, two pairs of support rolls carried by the mounting means, each pair being arranged side by side and contacting an associated curl corrector rod on its side away from the web, means for displacing said mounting means transversely to the path of the web between opposite sides of the straight line path between the pairs of guide rollers for correction of curl in either direction, and guide means for the mounting means to maintain the latter in their transverse displacement so that the angle formed by the deflected path of the web is always substantially bisected by the plane which passes through the axis of the curl corrector rod which is defleeting the web and equidistantly between its support rolls.
  • mounting means include a common mounting element at each end of the curl corrector rods and by which said rods are rotatably carried.
  • said guide means includes a pivotal linkage comprising, for each mounting element, a pair of non-parallel swinging arms pivoted at one of their ends at spaced positions on a fixed part of the apparatus adjacent to any of the pairs of guide rollers, and pivoted at their other ends at spaced positions on the respective mounting element.
  • said guide means includes pivotal arms each pivoted at one end to a fixed part of the apparatus adjacent to one of the pairs of guide rollers, the other ends forming said mounting elements, and carrying one end of each of the two curl corrector rods, links pivoted to the arms on the axes of the respective curl corrector rods and carrying said support rolls, and further links connecting the first mentioned links to spaced pivots on the fixed part.
  • said guide means includes rails extending transversely to the straight line path between the pairs of guide rollers and on which the mounting elements are carried.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US00233511A 1971-03-10 1972-03-10 Curl corrector apparatus for operating on a continuous web Expired - Lifetime US3779138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB652271A GB1379571A (en) 1971-03-10 1971-03-10 Curl corrector apparatus for operating on continuous travelling webs

Publications (1)

Publication Number Publication Date
US3779138A true US3779138A (en) 1973-12-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00233511A Expired - Lifetime US3779138A (en) 1971-03-10 1972-03-10 Curl corrector apparatus for operating on a continuous web

Country Status (4)

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US (1) US3779138A (de)
DE (1) DE2211629A1 (de)
GB (1) GB1379571A (de)
SE (1) SE383644B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610650A (en) * 1984-02-07 1986-09-09 Pcl Packaging Limited Plastic bag handle forming apparatus
US5141484A (en) * 1988-05-10 1992-08-25 Kobayashi Engineering Works, Ltd. Sheet curls reformer
US6331155B2 (en) 1999-02-16 2001-12-18 Dean S. Hanna Ribbon curling machine and process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0616309A (ja) * 1992-04-06 1994-01-25 Xerox Corp シートのカール除去システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087040A (en) * 1936-01-13 1937-07-13 George S Mican Speed control for continuous strip mill
US2303096A (en) * 1940-03-21 1942-11-24 Herbert V Thaden Apparatus for leveling and hardening sheet or strip material
US3442108A (en) * 1965-03-23 1969-05-06 Sundwiger Eisenhutte Mas Fab G Metal-handling method and apparatus
US3543365A (en) * 1967-06-01 1970-12-01 Toivo A Helminen Web stretching and shrinking device
US3643487A (en) * 1970-01-29 1972-02-22 Littell Machine Co F J Apparatus for continuously bending and flexing strip material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087040A (en) * 1936-01-13 1937-07-13 George S Mican Speed control for continuous strip mill
US2303096A (en) * 1940-03-21 1942-11-24 Herbert V Thaden Apparatus for leveling and hardening sheet or strip material
US3442108A (en) * 1965-03-23 1969-05-06 Sundwiger Eisenhutte Mas Fab G Metal-handling method and apparatus
US3543365A (en) * 1967-06-01 1970-12-01 Toivo A Helminen Web stretching and shrinking device
US3643487A (en) * 1970-01-29 1972-02-22 Littell Machine Co F J Apparatus for continuously bending and flexing strip material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4610650A (en) * 1984-02-07 1986-09-09 Pcl Packaging Limited Plastic bag handle forming apparatus
US5141484A (en) * 1988-05-10 1992-08-25 Kobayashi Engineering Works, Ltd. Sheet curls reformer
US6331155B2 (en) 1999-02-16 2001-12-18 Dean S. Hanna Ribbon curling machine and process
US6572521B2 (en) 1999-02-16 2003-06-03 Dean S. Hanna Ribbon curling machine and process

Also Published As

Publication number Publication date
DE2211629A1 (de) 1972-11-16
GB1379571A (en) 1975-01-02
SE383644B (sv) 1976-03-22

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