|Publication number||US3695801 A|
|Publication date||Oct 3, 1972|
|Filing date||Aug 25, 1970|
|Priority date||Aug 25, 1969|
|Also published as||DE2042121A1, DE2042121B2, DE2042121C3|
|Publication number||US 3695801 A, US 3695801A, US-A-3695801, US3695801 A, US3695801A|
|Inventors||Matsushita Hidekatsu, Ouba Kenichi|
|Original Assignee||Kuraray Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (2), Classifications (9)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [1 51 3,695,801 Matsushita et al. [4 1 Oct. 3, 1972 APPARATUS FOR CRUMPLING  References Cited SHEET-LIKE MATERIALS UNITED STATES PATENTS  Inventors: Hidekatsu Matsushita, Kyoto;
K i i Okayama, both f 2,335,313 11/1943 Rowe et al ..264/282 Japan 3,220,057 11/1965 Walton ..264/282 X  Assignee: Kuraray Co., Ltd., Osaka, Japan Primary Exandner j Spencer Overholser  Filed: Aug. 25, 1970 Assistant Examiner-Lucius R. Frye  1 App]. No: 66,673 Attomey--Chnsten & Sabol 30 F A  ABSTRACT 1 orelgn pphcamn Pmnty Data A machine for producing wrinkles in a continuously Aug. 25, 1969 Japan ..44/67445 moving web of sheet material comprises one or more sets of feeding mechanisms for the sheet material  US. Cl. "425/193, 264/282, 425/383 ting with a pair of semi-circular sinuously  Int. Cl "B296 17/02 km d di o e of the dies being fixed and the other  Field of Search ..l8/l FM, 1 FB, IFS, 1 FE,
18/1 FZ, ll, 19 R, 19 A, 19 C, 19 RR, 19 W, 19 D, DIG. 53; 264/231, 282, 283, 193; 425/334, 383, 391, 392
being moved in an orbital circular path transverse to the plane of the fixed die but spaced from it and without altering its angular relationship thereto.
15 Claims, 6 Drawing Figures PATKNTEDum I972 SHEET 1 BF 3 Fig. 2A
PATENTED B I973 3.695.801
SHEET 2 OF 3 Fig. IB
PATENFEDoms m2 3.695.801
sum 3 or 3 Fig. 4
m- III IIIIIIII I APPARATUS FOR CRUMPLING SHEET-LIKE MATERIALS The present invention relates to an apparatus, which treats sheet materials continuously in order to make them pliant and to give them wrinkles on the surface. In this case the term sheet material means sheet-like material such as an artificial leather which is made by inpregnating a synthetic resin in a fibrous substrate or by coating a synthetic resin on a fibrous substrate, or which is made by laminating sheets of synthetic resin.
Prior methods and devices for crumpling, or wrinkling, artificial leather, are disclosed in Japanese Pat. No. 485,395 and Japanese Patent Publication No. 5675/68 which is an addition patent application to the Japanese Pat. No. 485,395.
Japanese Pat. No. 485,395 discloses a method and a device in which the artificial leather is crumpled and wrinkled between a stationary holder and a movable holder. The stationary holder and the movable holder pinch the artificial leather with a force weak enough to permit the artificial leather to run through the holders and not to produce creases, and the movable holder is reciprocated from right and left or up and down or is moved in a composite reciprocal motions.
The Japanese Pat. Publication No. 5675/68 discloses a method in which protrusions are provided at appropriate intervals on the surface of the pinching device holding the artificial leather therebetween so that longitudinal wrinkles corresponding to the intervals between the protrusions are formed on the artificial leather and in which, in order to form lateral wrinkles, after the movement of the artificial leather is stopped and is gripped securely by the pinching device,
. the movable holder is moved toward the stationary holder, thereby slackening the artificial leather, and thereafter the movable holder is moved in circle or reciprocally in a direction transverse to the running direction of the artificial leather.
When the two methods for crumpling the artificial leather are studied, it is found that they cannot be carried out together, although one is the addition patent application to the other. That is to say, in the former method the artificial leather is crumpled continuously, while in the latter the artificial leather is crumpled intermittently, but not continuously. It is apparent that, as satisfactory wrinkles are not produced by the former method, the latter method was designed to produce wrinkles satisfactorily only by intermittent operation, that is to say, at the cost of discarding the advantage of a continuous treatment.
The apparatus for wrinkling sheet-like materials of this invention is a useful apparatus in the industry in which the defects of the well-known methods and apparatus for crumpling artificial leathers are overcome. The apparatus is capable of continuously treating sheet-like materials and producing sheet-like materials which are uniformly soft and wrinkled as may be desired.
In the drawings,
FIGS. (1A and 1B are a plan view of a preferred form of apparatus constructed in accordance with the teachings of this invention;
FIGS. 2A and 2B are a side elevation of the same;
FIG. 3 as a transverse vertical cross-section taken on the line 3-3 of FIG. 1A, and;
FIG. 4 is a transverse vertical cross-section taken on the line 4-4 of FIG. 1A.
With reference to the accompanying drawings, numeral 1 indicates a roll of sheet material of the type previously described which is to be treated by the apparatus hereinafter described to provide it with a wrinkled finish. This supply of sheet material is supported in a suitable frame. The sheet material from this supply roll is pulled off by a conventional drive means la, which includes the guide roll 8-1 and feed roll 2 to provide moving websl of sheet material which passes next through an intermediate feeding device 4-1, whichimparts an arcuate transverse cross-sectional configuration to the moving web preliminary to its passage through an arcuate wrinkling mechanism, indicated generally by numeral 5-1, after which the curved web may be subjected to the application of heat, by means of a heater 9-1 and transferred further by means of a second feeding device 4-2 through a second wrinkling means 5-2, again subjected to the influence of heating means 9-2, drawn off by intermediate feeding means 4-3 and 4-4 to be returned to a flat cross-sectional configuration by guide rolls 8-2 prior to accumulation on a take-off roll 7 by means of the draw-out roll mechanism 6.
The invention particularly relates to the series of intermediate feed devices 4-1, 4-2, 4-3, and 4-4, shown in cross-sectional elevation in FIG. 4, and the wrinkling devices 5-1 and 5-2, shown in cross-sectional elevation in FIG. 3. While there are four feed devices and two wrinkling devices shown, it will be realized that there may be fewer of each of the devices employed or the number may be increased, according to the space available and the type of material being treated.
In FIG. 4, one of the intermediate feeding devices is shown and, since all are identical in general construction, only the one need therefore be described. As shown, the web of sheet material 10, whose side margins have passed through the guides 3-1, come into engagement with a series of feed rolls 27, 27' and 27" mounted on shafts 29, 29' and 29" which are rotatably supported on a suitable framework at right angles to each other so as to position the feed rolls in alignment with the peripheral surface of a generally cylindrical guide plate 26. In addition, there are also a set of backup rolls 28, 28' and 28 positioned opposite the respective feed rolls on resilient supports (not shown) so that each of the feed rolls, assisted by a respective back-up roll grips the sheet material in frictional driving engagement. The three driving shafts are connected by right-angled gear drives 32 so that they may be rotated in unison by a driving device 30 connected to shaft 29 by means of a conventional constant torque transmission means 31. In this way, each of the intermediate feeding devices exerts an even tension on the web of sheet material as it passes through the wrinkling devices.
FIG. 3 illustrates one of the wrinkling devices and since all of the wrinkling devices are similar, only the one need be specifically described. These devices include a stationary die holder 11 and a movable die holder 12. The stationary die holder is itself mounted on a slideway 15 which permits it to be shifted toward and away from the movable die holder in a direction parallel with the movement of the web 10. The stationary die holder includes a semi-circular outside-die 17 and a complementary generally disc-shaped inner die 18, both of which are replaceably mounted on a support 19, so that the inner peripheral surface of die 17 and the outer peripheral surface of die 18 together define a sinuous, or corrugated slot 16, the width of the slot being no greater than approximately three times the thickness of the sheet material to be processed in order to eliminate the possibility of the material being folded over during passage through the slot.
The movable die holder 12 also replaceably supports an outer semi-circular die 17' and an inner disc-shaped die 18' by means of a support 19' which is mounted on a laterally projecting frame 20 and the adjacent peripheral surfaces of the dies 17' and 18' also define a sinuous, or corrugated slot 16 similar to the slot 16 and also preferably no wider than approximately three times the thickness of the material to be processed.
The frame 20 is supported, by means which will be described, so that it moves bodily in a circular orbital path as viewed in FIG. 3 so that the movable die holder 12 moves about the center line of the fixed die holder 11 without however changing its angular relation to the fixed die holder. To accomplish this the frame 20 is provided with two horizontally spaced bearings 24 and 24, only one of which (24' can be seen in FIG. 3; the frame 20 being broken away in that view to show an arm 23 provided with a pin 21 which is rotatably received in the corresponding bearing 24. Each of the arms 23 and 23' are mounted transversely on shafts 22 and 22 (see FIG. 1A) and each arm is provided with an adjusting screw 25 which is arranged to change the radial offset of the pins 21 from the centers of the respective two shafts. The two shafts 22 and 22 are driven in unison by means of a belt, or chain 33, connected with a reversible drive mechanism 14 which, in turn, is driven by a motor 13.
In operation, the sheet material 10 is fed from the supply roll 1 by the drive means la, through the guide roll 8 1 and feed roll 2 in a flat condition, after which it is converted to a arcuate cross-section by the first of the side margin guides 3-1 and the first of the intermediate feed devices 4-1 and after passing through another set of side margin guides 3-2 is introduced into the slots 16 and 16 of the fixed and movable die holders 11 and 12 of the first wrinkling mechanism 5 1. The arcuate sheet of material is then drawn on through the side margin guides 33 by the next intermediate feed device 4 2 under constant tension and introduced through side margin guides 3-4 into another wrinkling device 5 2 comprising fixed and movable dies as in the first wrinkling mechanism. From here the sheet is withdrawn through side margin guides 3-5 by further intermediate feed mechanisms 40 3 and 44,
with an additional side margin guide 3-6 disposed between them, and returned to a flat condition by guide roll 8 2 and fed to a up roll 7 by means of the drawout rolls 6.
During the movement of the sheet 10 through each of the wrinkling mechanisms the movable die holder 12 in each case may be movable in its orbital path with respect to the fixed die holder 11 in either a clockwise, or counterclockwise direction, as seen in FIG. 3. Obviously, if such movement is clockwise, the sheet 10 as a whole will tend to shift in the stationary die slot 16 in the same direction. Consequently, the reversing drive mechanism 14 may be arranged to automatically reverse the direction of said rotation at programmed intervals of time, or in response to sensing mechanisms not shown), to avoid the possibility that the shift of the material in the fixed slot 16 becomes so great that one or the other of the marginal edges of the sheet material becomes entangled at a respective end of the slot 16, such mechanisms for actuating reversal of the drive mechanisms and for sensing the positions of the moving web are well known in the art.
In addition, the web of sheet material as it leaves the wrinkling mechanisms may be subjected to the influence of heating devices, respectively identified by numerals 9 l and 9 2 which devices may comprise electrical radiant heaters, or blowers conducting heated air from a remote heating source (not shown).
Finally, it will be understood that the type of wrinkle obtained will depend upon many factors, all of which may be independently controlled in accordance with the teachings of this invention, such as:
l. Feeding rate of the sheet-like material.
2. Shape of the slit of the holders.
3. Distance between the stationary holder and the movable holder.
4. Number of revolutions of the movable holder.
5. Degree of the offset of the movable holder.
6. Tension at the wrinkling device.
Having disclosed one form of apparatus in accordance with this invention, it will be understood that various modifications and improvements may be made which would come within the scope of the annexed claims.
What is claimed is:
1. Apparatus for continuously producing wrinkles in a moving web of sheet material comprising first and second complementary die means, each of said die means including a fiat plate means provided with an arcuately extending slot having a sinuous configuration, means to mount the first die means in a fixed position in a first plane, means to support the second die means, with the plate means of the second die means disposed in a second plane parallel to and spaced from said first plane of the plate means of the first die means and movable translatorily in an orbital path disposed in said second plane and transversely with respect to the center line of the first plate means, and means for moving a web of sheet material serially through said sinuously configured slots while said second die means is moving in said orbital path.
2. The invention defined in claim 1, wherein the width of said sinuously configured slot in said fiat plate means is approximately three times the thickness of the web of sheet material being wrinkled.
3. The invention defined in claim 2, wherein said plate means includes an outer semicylindrical plate and an inner disclike plate, the respective inner and outer peripheral surfaces of said plates defining said sinuous slot, and means to mount said inner and outer plates in coacting relationship.
4. The invention defined in claim 3, wherein said first die means includes mounting means for adjusting the spacing between the first and second die means.
5. The invention defined in claim 1, wherein said second die means includes rotary mounting means for supporting the second die means and drive means for moving the second die means selectively in said orbital path in either clockwise or counterclockwise direction.
6. The invention defined in claim 5, wherein said rotary mounting means includes means for varying the displacement of said translatory movement in said orbital path.
7. The invention defined in claim 5, wherein said second die means includes frame means for removably holding said plate means, and said rotary mounting means includes a pair of driven rotary shafts mounted for rotation about axes generally parallel with the direction of movement of the web, radially extending arm means secured to each of said shafts and bearing means positioned eccentrically with respect to said respective axes connecting each of said arm means with said frame means.
8. The invention defined in claim 7, wherein said arm means includes radially slidable connection means for securing said bearing means, and adjustment means for holding the slidable means in a variety of positions.
9. The invention defined in claim 1, wherein said means for moving the web includes drive means disposed in frictional engagement with the surface of said web, said drive means including constant torque coupling means for exerting a constant tension in the web.
10. The invention defined in claim 1, wherein said means for moving the web includes guide means for receiving a moving web of flat sheet material and imparting a transverse curvature to said moving web prior to movement through a die means.
11. The invention defined in claim 10, wherein said means for moving the web includes additional guide means for retaining an arcuate transverse curvature in said moving web after passing through said die means.
12. The invention defined in claim 11, wherein said means for moving the web includes means for maintaining a predetermined longitudinal tension in said moving web. v
13. The invention defined in claim 10, wherein said guide means comprises a generally circular element spaced from said die means, a plurality of driving rollers positioned for frictional engagement with the surface of the web, a back-up roller for each of the driving rollers positioned on the respective opposite side of the web and resiliently urging the web into said frictional engagement, and means for turning the driving rollers in unison.
14. The invention defined in claim 13, wherein said means for turning the driving rollers includes constant torque coupling means for maintaining a predetermined tension in the web.
15. The invention defined in claim 1, wherein said apparatus also includes means for heating said moving web as it moves away from said die means.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2335313 *||May 15, 1939||Nov 30, 1943||Cincinnati Ind Inc||Method for producing laterally stretchable webs|
|US3220057 *||Oct 27, 1961||Nov 30, 1965||Walton Richard R||Treatment of sheet materials|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4676729 *||Jan 31, 1986||Jun 30, 1987||Robert B. Turpin||Lightweight roofing module and apparatus and method for manufacturing same|
|US5814390 *||Jun 30, 1995||Sep 29, 1998||Kimberly-Clark Worldwide, Inc.||Creased nonwoven web with stretch and recovery|
|U.S. Classification||425/193, 264/282, 425/383|
|International Classification||B29C59/04, D06N3/00|
|Cooperative Classification||B29C59/04, D06N3/0077|
|European Classification||D06N3/00F6, B29C59/04|