US2360277A - Method of splicing two webs in overlapping relation - Google Patents

Method of splicing two webs in overlapping relation Download PDF

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Publication number
US2360277A
US2360277A US406159A US40615941A US2360277A US 2360277 A US2360277 A US 2360277A US 406159 A US406159 A US 406159A US 40615941 A US40615941 A US 40615941A US 2360277 A US2360277 A US 2360277A
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US
United States
Prior art keywords
web
webs
relative humidity
equilibrium
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
US406159A
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English (en)
Inventor
Alfred C Robertson
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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
Priority to FR962111D priority Critical patent/FR962111A/fr
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US406159A priority patent/US2360277A/en
Application granted granted Critical
Publication of US2360277A publication Critical patent/US2360277A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D15/00—Apparatus for treating processed material
    • G03D15/04—Cutting; Splicing
    • G03D15/043—Cutting or splicing of filmstrips

Definitions

  • the present invention relates to the method of splicing two webs in overlapping relation, and particularly to the method of splicing two webs of hygroscopic material which will insure a flat splice.
  • one object of the present invention is to provide a method of splicing two webs in overlapping relation so that the splice will be flat and remain fiat until purposely ruptured.
  • Another object is to provide a method of forming a fiat splice which is commercially practical and can be carried out without necessitating a shut down of the coating and drying machine.
  • Another object is to provide a method of forming a fiat splice which is simple to carry out and requires little or no special apparatus.
  • Fig. 1 is a partial side elevation of a splicing apparatus shown in my U. S, Patent 2,213,744,
  • Fig. 2 is a perspective view of the apparatus in which one end 01' the web to be spliced is treated in accordance with the present invention.
  • FIG. 3 is an enlarged sectional view of the apparatus shown in Fig. 2 with an, end of a web to be treated shown inserted thereunto, and
  • Fig. 4 is a graph depicting how the dimensions of a web varies with the length of time" during which it is dried in accordance with one embodiment of the present invention.
  • a web when it is fabricated and rolled up into a stock roll generally is in equilibrium with a very low relative humidity. If the stock roll is stored in a storage room or'moved into the unwinding room of the coating machine where the relative humidity is higher than that with which the web material is in equilibrium it has been found that the outer wraps of the roll will in a short time swell, or increase in moisture content, until it is in equilibrium with the relative humidity of the storage, or under-winder, room of the coating machine. It has been found, however, that no matter how long a stock roll of the web is kept in the storage room, or in the unwinder room, the inner wraps of the roll will never come into equilibrium with the relative humidity of said room.
  • the solid line shows how the width of the web being dried varies with the length of time during which it is being dried.
  • the dot-dash line of the graph shows the desired width, or the width of the web on the inner wrap 01' the previous stock roll having an effective relative humidity which is to be obtained. It will be appreciated that the width of a hygroscopic web will vary directly as the change in relative humidity with which it is in equilibrium so that instead of change in width the ordinate of the graph could be marked in relative humidity.
  • the end of the outer wrap of the new stock roll could be dried just to the point where it was the desired width, or the width of the inner wrap of the previous stock roll, but I- have found that since a.
  • the web will more readily increase in moisture content when exposed to an atmosphere having a higher relative humidity than the one with which it is in equilibrium, then it will give up moisture, and a more accurate control is obtained by drying the end of the web below the desired value and allowing it to pick up moisture from the atmosphere of the un-' winder room.
  • the dotted lines of the graph indicate the rate at which the web will pick up moisture to reach the desired width, or effective relative humidity.
  • splicing apparatus proper, as indicated, may be of the form best shown in my U. S. Patent 2,213,744, issued September 3', 1940, which is particularly adapted for splicing relatively wide webs of material in overlapping endwise relation.
  • the splicing apparatus per se forms no part of the present invention but is only shown to indicate how the apparatus for treating the end of one web which is to be spliced to a sec- 0nd web may be associated with the splicing member thereof to carry out the treating step in a routine manner without necessitating a slowing down of the feeding of the continuous web.
  • the splicing apparatus comprises a support I on the top 2 of which the ends of two webs W and W to be spliced are adapted to be placed in overlapping endwise relation below the pressure element iii of the apparatus.
  • a chamber 6 which is of a general tubular shape and having two spaced radially extending lips I forming a slot into which the end of the web of hygroscopic material W to be dried is adapted to be inserted a shown.
  • the chamber 6 is close'dat both ends and is preferably equal in length to the width of the web W.
  • Dry air held at the 'same temperature as that of the web which is being unwound is forced into the chamber 6 through a conduit 8 communicating therewith, and may be distributed over the length of th chamber by any suitable form of baffles desired, or may be directed against the end of the web to be distributed by the force of impingement of the blast against the web, see Fig. 3.
  • the end of the web W is left in the chamber 6 until it has been shrunk to a point below the desired width, see Fig. 4, after which it is withdrawn into the atmosphere of the unwinder room in which the splicing apparatus is preferably located and allowed to increase to the desired width, or to the width of the end of the web W to which it is to be spliced.
  • the air for drying the web may be dried in any nuln-- ber of different ways.
  • compressed air which has been passed through a U-tube packed with dry ice may be forced into conduit 8; or my experience has shown that 75 pounds of compressed air which has been chilled to 40 F. is dry enough if the water is removed at the higher pressure and then the air is allowed to expand to atmospheric pressure.
  • 75 pounds of compressed air which has been chilled to 40 F. is dry enough if the water is removed at the higher pressure and then the air is allowed to expand to atmospheric pressure.
  • only the ends of the two webs are in overlapping relation when spliced together, only that portion of the web W on the new stock roll which is to overlap the end of the other web W need be in eqilibrium with the same relative humidity as said other web.
  • the chamber 6 need only be sumciently large to dry the end of the web on a new stock roll as indicated in Fig. 3. After the end of the web W has come into equ librium with the same relative humidity as the end of the web W they may be brought into overlapping relation under the pressure element I of the splicing apparatus and be spliced in the manner set forth in my above noted patent.
  • the free end of the new stock roll is readily accessible and can be dried in the manner set forth during the time the last few wraps of the previous stock roll are being Wound off. Then when the inner end of the previous stock roll is available, the free end of the new stock roll is properly conditioned and ready to be spliced thereto in a manner set forth in my U. S. Patent 2,213,144., issued September 3, 1940. thus requiring no shutdown of the machine.
  • This novel method of splicing not only cuts down the amount of coated web heretofore wasted due to streaking of the coating in the vicinity of the splice because of transverse buckling thereof, but eliminates ruptures of splices dueto buckling which cause a shut down of the coating and drying machines and necessitate a rethreading thereof.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US406159A 1941-08-09 1941-08-09 Method of splicing two webs in overlapping relation Expired - Lifetime US2360277A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR962111D FR962111A (enrdf_load_stackoverflow) 1941-08-09
US406159A US2360277A (en) 1941-08-09 1941-08-09 Method of splicing two webs in overlapping relation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US406159A US2360277A (en) 1941-08-09 1941-08-09 Method of splicing two webs in overlapping relation

Publications (1)

Publication Number Publication Date
US2360277A true US2360277A (en) 1944-10-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
US406159A Expired - Lifetime US2360277A (en) 1941-08-09 1941-08-09 Method of splicing two webs in overlapping relation

Country Status (2)

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US (1) US2360277A (enrdf_load_stackoverflow)
FR (1) FR962111A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581977A (en) * 1948-09-09 1952-01-08 William F Stahl Apparatus for sealing plastics
US2636838A (en) * 1947-04-14 1953-04-28 Mead Corp Method of producing a flat moistureproof paper lamination
US20060141216A1 (en) * 2004-12-28 2006-06-29 Hartman David R Spliced fabric

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636838A (en) * 1947-04-14 1953-04-28 Mead Corp Method of producing a flat moistureproof paper lamination
US2581977A (en) * 1948-09-09 1952-01-08 William F Stahl Apparatus for sealing plastics
US20060141216A1 (en) * 2004-12-28 2006-06-29 Hartman David R Spliced fabric

Also Published As

Publication number Publication date
FR962111A (enrdf_load_stackoverflow) 1950-06-02

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