US3854249A

US3854249A - Deckle grinder

Info

Publication number: US3854249A
Application number: US00377368A
Authority: US
Inventors: W Fletcher
Original assignee: Sonoco Products Co
Current assignee: Sonoco Products Co
Priority date: 1973-07-09
Filing date: 1973-07-09
Publication date: 1974-12-17
Anticipated expiration: 1991-12-17

Abstract

Deckle grinding apparatus is described wherein a web of material, such as paper, is wrapped approximately 180* around a support drum so one or both edges overhang the drum. Tension is applied to the web to provide increased strength to permit a grinding wheel at an angle to the longitudinal axis of the drum to grind a deckle on the edge of the web.

Description

United States Patent [1 1 Fletcher [4 1 Dec. 17,1974

[ DECKLE GRINDER [75] Inventor: Wade D. Fletcher, Hartsville, SC.

[73] Assignee: Sonoco Products Company,

l-lartsville, SC.

[22] Filed: July 9, 1973 [21] Appl. No.: 377,368

[52] US. Cl. 51/75, 91/1 G [51] Int. Cl B24d 7/00, B24d 9/00 [58] Field of Search 51/74-78, 110;

[56] References Cited UNlTED STATES PATENTS 2,217,306 10/1940 Burrill 51/75 2,392,375 l/1946 Gardella 51/78 Primary ExaminerOthell M. Simpson Attorney, Agent, or Firm--C. Gordon McBride 5 7 ABSTRACT Deckle grinding apparatus is described wherein a web of material, such as paper, is wrapped approximately 180 around a support drum so one or both edges overhang the drum. Tension is applied to the web to provide increased strength to permit a grinding wheel at an angle to the longitudinal axis of the drum to grind a deckle on the edge of the web.

8 Claims, 3 Drawing Figures DECKLE GRINDER This application is directed to deckle grinding apparatus and more particularly to such apparatus for grinding the edge of a web of paper at a specific angle and dimension.

It has long been a problem in preparing webs of material such as paper which are to be used in production of spiral tubes or containers that the edge of the plies that overlap the next below ply have a substantial raised portion caused by the overlap. It has also been difficult to provide a butt joint that does not leave a space and thereby cause weakening of the tube or can body. In order to avoid these difficulties, it has been suggested that the edge of the ply or web be deckled or skived such that it is angled to the plane of the surface of the web of material.

Various apparatus has been suggested which can be utilized for this purpose. However, the known apparatus does not skive or deckle the edge of the paper such that there is a smooth, even outer edge and the equipment is quite cumbersome and expensive. Furthermore, the known equipment is difficult of use in-line with a relatively rapidly producing converting operation.

In order to overcome the above disadvantages, the instant invention contemplates the utilization of a drum aroundwhich the web of material is passed under tension. A powered grinding wheel is mounted at an angle such that the desired amount of angle and paper is removed during the grinding operation.

Reference is now made to the drawings wherein like numerals refer to the same or similar parts and wherein the invention may be best understood by reference to the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front view of the instant apparatus;

FIG. 2 is a diagrammatic side elevational view of the invention with portions removed for clarity; and

FIG. 3 is a front elevational view of a modification of the instant invention.

Referring now to the drawings and more specifically FIGS. 1 and 2 wherein deckle grinder 10 is shown in a position for deckling a web 12 of material such as paper. Support drum 14 is substantially cylindrical having circular outer surface 16. Drum 14 is mounted on a framework 18, a portion of which is omitted for clarity, including shaft 29 and bearings 31. As best seen in FIG. 1, drum 14 may have a pair of disk-like elements 15 for more accurate control and greater operational efficiency.

Grinder 20 includes grinding wheel 22 which is powered by conventional motor 24. Motor 24 is adjustably supported from framework 18 by support elements or bearings 26 in an adjustable manner to permit the rotation of the grinding wheel 22 as observed in FIG. 1.

Web guide bars 28 and 30 on the supply and converting sides of drum 14, respectively, are mounted adjacent to, but spaced from drum surface 16. Generally it is preferable to have

guide bars

28 and 30 mounted slightly above centerline 17 of drum 14. This permits the appropriate location and maintenance of tension on web 12 as it passes around drum 14.

As best seen in FIG. 1, a portion of web 12 extends beyond the end of drum 14 to provide a web overhanging edge 32. A portion of overhang 32 is ground away by grinding wheel 22 to provide deckled portion 34.

Tension device 36 is provided between guide bar 28 and the web supply which is not shown, but may be of any conventional construction.

Referring now to FIG. 3, an alternative arrangement of the instant invention is shown as having a narrow drum 42 which is of less longitudinal length than the width of web 50. A pair of

grinding wheels

44 and 46 are mounted similarly to wheel 22 shown in FIG. 1 to grind overhangs 52 of web 50 and thereby provide deckles on each side of web 50. Guide bar 48 is shown in a position similar to that for guide bar 30 in FIG. 2.

The adjustable mechanism for mounting grinding wheel 22 and its drive motor 24 are shown in FIG. 1. Supporting framework 18 includes a flat horizontal surface 19 on which is mounted slide 60. Slide has feet 61 which slide along surface 19. Extending upwardly from slide body 60 are arms 62 receiving pivot projections 65. Near the other end of slide body 60 are located upright projections 63 for receiving pivot bars 72 for mounting of motor mount 74. Motor mount 74 includes downwardly directed legs 76 which also receive pivot bar 72 to permit motor mount 74 and motor 24 to pivot about bar 72 in the plane of the drawing as viewed in FIG. 1.

Arms 62 receive pivot projections 65 which extend from eccentric shaft 64. Handle 66 permits the rotation of shaft 64 to raise or lower motor mount 74 which contacts one surface of shaft 64. A pair of support legs 71 extend upwardly from support frame 18 to receive threaded shaft 68 which has handle 70 attached to one end. This construction permits rotation of handle 70 to move slide 60 to the right or left as viewed in FIG. 1. This adjustment permits the movement of grinding wheel 22 toward or away from drums 14 or 42. Rotation of handle 66 raises or lowers grinding wheel 22 and, in conjunction with handle 70, permits an accurate location of grinding wheel 22 to provide for the deckling of a proper amount of web 12.

In operation, web 12 passes from the supply location through tension device 36, around guide'bar 28 onto surface 16 of drum 14 around which it is wrapped approximately l. Web 12 then passes over guide bar 30 and to the converting operation or a rewind apparatus, not shown. As web 12 passes over drum 14, it is put into an arcuate position to thereby provide strength and rigidity to the web such that grinding wheel 22 may grind a portion of overhang 32 to form the deckle 34. It is noted that grinding wheel 22 is of a dimension less in diameter than the diameter of support drum 14 to permit only a portion of grinding wheel 22 to encounter overhand 32. As web 12 passes grinding wheel 22, a portion is removed to form deckle 34.

Thus it is seen that the instant apparatus provides an economical, simple and compact apparatus for deckling the edge of a web of material such as paper. The apparatus is capable of use in-line with various pieces of equipment such as spiral winding machines. Utilization of the easily controlled tension device 36 and modification of the angle of grinding wheel 22 provide the desired thickness and angle for the deckle. The instant apparatus avoids the use of a back-up plate with the attendant wear and potential damage to web 12 and also provides a smooth linear edge on web 12.

What is claimed is:

l. A deckle grinder comprising: means for supporting a moving web of material in an arcuate configuration; grinding means for removing a portion of the edge of the arcuate section of the web to provide a deckle; said grinding means mounted at an angle to said supporting means and within said arcuate section of said web, whereby a portion of the web may be removed by the grinding means to provide a uniform and properly angled deckle on the edge of the web.

2. The deckle grinder of claim 1 wherein said support means includes a drum around a portion of the exterior surface of which is passed a moving web of material.

3. The deckle grinder of claim 1 wherein said grinding means is of less radial dimension than that of said support means.

4. The deckle grinder of claim 1 wherein said support means comprises a cylindrical drum and said grinding means comprises a grinding wheel mounted for contact with the edge of the web which overhangs the end of said drum.

5. The deckle grinder of claim 4 wherein said grinding wheel is of less diameter than the drum.

6. A deckle grinder comprising a cylindrical drum adapted to support a moving web of paper around a portion of its exterior surface; a grinding wheel; means for rotating said grinding wheel; said grinding wheel .of less diameter than said drum and mounted at an angle to the longitudinal axis and end thereof; and means for supporting the web as it approaches and departs from said drum, whereby a portion of the web overhangs the end of said drum and contacts the edge of said wheel such that a portion of the overhanging web is removed.

7. The deckle grinder of claim 6 wherein are provided supporting means for the web as it approaches and departs from said drum; and said supporting means adjacent to and spaced from the exterior surface of said drum.

8. The deckle grinder of claim 6 wherein said supporting means comprise a pair of guide bars; at least one of said bars being adjacent but spaced from the exterior surface of said drum to support the web prior to the latter encountering said drum; and another of said guide bars adjacent to but spaced from said drum approximately l around said drum from said first guide bar.

Claims

1. A deckle grinder comprising: means for supporting a moving web of material in an arcuate configuration; grinding means for removing a portion of the edge of the arcuate section of the web to provide a deckle; said grinding means mounted at an angle to said supporting means and within said arcuate section of said web, whereby a portion of the web may be removed by the grinding means to provide a uniform and properly angled deckle on the edge of the web.

6. A deckle grinder comprising a cylindrical drum adapted to support a moving web of paper around a portion of its exterior surface; a grinding wheel; means for rotating said grinding wheel; said grinding wheel of less diameter than said drum and mounted at an angle to the longitudinal axis and end thereof; and means for supporting the web as it approaches and departs from said drum, whereby a portion of the web overhangs the end of said drum and contacts the edge of said wheel such that a portion of the overhanging web is removed.

8. The deckle grinder of claim 6 wherein said supporting means comprise a pair of guide bars; at least one of said bars being adjacent but spaced from the exterior surface of said drum to support the web prior to the latter encountering said drum; and another of said guide bars adjacent to but spaced from said drum approximately 180* around said drum from said first guide bar.