FR2507167A1 - COIL PAD - Google Patents

Abstract

A FULL PAD OF WOOD, PLASTIC MATERIAL OR WOOD-LIKE COMPOSITE MATERIAL HAS A CYLINDRICAL BODY PART AND AN ANTERIOR SOLID PART OF THE CYLINDRICAL BODY PART AND SHRINKING THEREFRONT. THE OUTER FACE OF THE BODY PART HAS A DIAMETER SUBSTANTIALLY EQUAL TO THE INNER DIAMETER OF THE COIL 15 FOR WHICH THE BUFFER 16, 17 IS PROVIDED AND THE INNER FACE OF THE ANTERIOR PART HAS A SLIGHTLY LOWER DIAMETER THAN THE FACETER INSERTING THE BUFFER INTO THE END OF A COIL. THE COIL BUFFER 16, 17 HAS AN OPENING OR GROOVE 19 WHICH, FAR FROM THE CENTER OF THE LATTER AND NEAR ITS EXTERNAL PERIPHERY, EXTENDS OVER THE WHOLE LENGTH OF THE BUFFER TO ALLOW EASILY REMOVAL OF A REEL .

Description

Spool pad.

  The present invention generally relates to

  the improved coil pad to protect ex-

  paper hollow bobbin hoppers on which paper

  pier, plastic, fabric or other materials

  res are wound for storage, transport and use. In particular, the present invention relates to a spool plug formed from wood, plastic or a wood-like composite material which has increased mechanical resistance compared to to stamps

  of existing reels thanks to a new arrangement for reti-

  remove the spool pads after use.

  In paper factories, textile factories

  and the like are rolls of paper and / or fabric

  usually wound on tubular coils which are usually made of a paper-like material such as cardboard of varying thickness

  coils are relatively strong, except at their ends

  mites where they can be easily damaged During transport and handling the rolls of paper and other materials are picked up and moved in groups

  times and if the ends of the coils are damaged

  unspecified formations the whole roll of paper or other material becomes unusable since it cannot be maintained in an appropriate way That is why, in order to protect such reels, pads are generally

  set up in the ends of the coil.

  Stamps of various sizes corresponding to

  coils of different dimensions are currently available

  These pads are made of different types of material and have various specific characteristics.

  straps to increase their mechanical strength and usefulness.

  In general, however, most spool pads are made of wood or a molded material based on

  wood Molded wooden pads for coils are commercially

  marketed by the Moldwood Corporation, Drawer 430, York,

  Alabama 36925 (United States of America) Bobbin pads

  marketed by the Moldwood Corporation and described

  in their commercial documentation are of a classi-

  and have a central hole to remove the spool pads Most pads need to be removed from the

  reels before the rolls of paper, fabric or ana-

  cannot be used Tampons can be used

  removed from the coils by inserting a bar or rod

  metal in the hole provided in the buffer at the level where it

  push or pull the pads to get them out

  reel shot however usually the bar or rod

  metal is introduced into the hole of a tampon and soul

  born in contact with the inner side of the opposite pad so that it can be expelled Since the spool pads can have various sizes, the holes

  provided for therein may also have dimensions

  different sions In general, bars or rods used

  to remove the pads from the coils are made of metal and have a diameter of 12.7 to 19 mm 'The holes in the pads should therefore be at least as large as the

  bars or rods used to remove these.

  Other types of stamps are described in the briefs.

  American clothing Nos. 4,015,711; 3,627,220; 3,547,367; 2,196,378 and 1,991,769 The buffers described in these

  patents are in the form of sockets made of material

  re plastic or metal and, with the exception of the spool pad described in US Patent No. 2,196,378, they all have a central hole for removing the pads from a spool. coil has a pair of ribs which

  cross and divide the face of the spool pad in four

  tre sectors Consequently, in order not to reduce the increased resistance obtained by the ribs arranged in a cross, the hole for removing the buffer from the coil is

  located off-center in one of the sectors.

  The spool pad according to the present invention presents

  te increased mechanical strength and durability compared to existing coil pads, and this

  thanks to the absence of the usual central hole intended to per-

  put to remove the pad from a coil.

  The coil buffer according to the invention, intended to reinforce

  force the ends of tubular reels for paper

  or the like and comprising a part forming a cylindrical body

  solid brick fitting snugly in the outside

  mite of a coil and an anterior part integral with the body part and narrowing forward from the latter to facilitate the introduction

  of buffer in the end of a spool, the outer side

  buffer with a slightly larger diameter

  laughing at that of its inner face, is characterized in that it has an opening situated at or near its outer peripheral surface and which extends over the entire length of the spool pad for

  allow it to be easily removed from a box

  well. Thanks to this method of construction, the spool plug according to the invention has considerable mechanical resistance since it does not have the central hole.

  usual for removing a standard tampon

  sic of a coil when it comes to supporting the bo-

  bin to mount it on a rewinder, rewinder

  hoeing or the like Unlike the prior art

  the spool pad according to the invention has an opening or groove remote from the center of the pad and close to the outer periphery thereof or it

  extends over its entire length This agency-

  allows the tampons of the invention to be quickly and easily removed from the reels in the normal manner using for this purpose a conventional removal means of the kind described above Or, since the reel pads of the present invention do not have the usual central hole, they are much more resistant

  as prior art coil pads

read in the same material.

  The spool pad according to the invention is preferably

  Rence made from wood, plastic or a wood-like composite material in a mold or, if necessary, machined in a bar An example of a wood-like composite material is that called

  molded wood and defined as a composition of co-

  skins, chips or sawdust, resins and / or glue mixed together and heated under pressure in a mold so as to obtain the desired shape The spool pads according to the invention are distinguished in particular by the fact that they

  are substantially full bodies which have one or more

  groove or groove which, intended for the removal of the pad,

is far from the center.

  The invention is explained in more detail below with the aid of the accompanying drawings in which: Figure 1 is a perspective view of a typical coil in each end of which is a conventional coil buffer of the prior art ; FIG. 2 represents, partially in perspective and for another part in section, a tubular paper reel, the two ends of which are reinforced by pads produced in accordance with the present invention; Figure 3 is an enlarged perspective view of a spool plug made in accordance with the present invention;

  Figure 4 is an end view of a bobbin pad

  ne according to the invention and shows a typical form of the

  groove or groove of the spool pad; and

  Figure 5 is a view similar to Figure 4 my-

  trant a modified form of the opening or groove.

  In Figure 1 is shown an elongated paper spool 10 in each end of which is placed a conventional terminal pad 11, 12 The conventional spool pads each have a hole respectively

  central 13, 14 through which a bar can be introduced

  pick for removing the pads from the coil These pads 11 and 12 serve to protect the ends of the coil 10 during storage and transport by absorbing shocks suffered during handling and crushing charges during transport Figure 2 , however, my Gre le

  new type of coil buffer according to the invention.

  FIG. 2 shows a typical thick cardboard reel 15 in each of the ends

  from which is placed respectively a buffer of bo-

  bine 16, 17 These coil buffers 16, 17 are preferably

  this in wood or in a molded material reminiscent of wood but can also be made from other materials

  such as plastic if it doesn’t

  no inconvenience in terms of cost price Cha-

  that coil buffer 16, 17 present, in order to allow its

  removal, an opening or groove 18, 19 located at proti

  mite from the outer periphery of the buffer, which gives the coil pads 16, 17 a higher crushing strength than that of the conventional coil pads 11, 12 shown in Figure 1 The increased mechanical strength

  was evidenced by the results of crushing tests-

  to which samples of coil buffers have been submitted. Pine wood pads and molded wood pads were subjected to a series of crush tests to measure their crush resistance The tests were carried out in accordance with standard test methods

  established by an institute, known as CCPI, specializing in

  dried in the field of composite boxes and tubes.

  Each of the coil buffers being tested

  had a nominal outside diameter of approximately 76.2 mm.

  Each time a reel containing a buffer is placed

  created in a compression dynamometer with a plate

  upper plate and a lower plate which are kept strictly parallel during the test so as not to

  allow movements in a vertical direction.

  tness of the movable plate is set at 12.7 mm per minute The coil containing the buffer is placed centrally between the two plates and a crushing load is applied until the load becomes constant, or abruptly decreases, indicating a collapse coil buffer,

  or until the dynamometer reaches its limit load.

  the data obtained are recorded in the form of a curve on a recording tape and the values of the

  applied load are taken from the curve at intervals

those of 2.54 mm.

EXAMPLE I

  In this example wooden spool pads of

  pin are subjected to a series of coil crush tests.

  The results obtained are taken as the average - by subjecting conventional spool pads and spool pads made according to the invention to four separate tests, which gives the values shown in Table I. These values show that for wooden pads of pine the direction of the fibers plays an r 8 the important in the overall crush resistance The values of resistance to crushing obtained during the tests where the direction of the fibers corresponds to

  the direction of the applied force are generally

  greater than that obtained when the direction of the fibers is perpendicular to the force applied When the direction of the fibers is perpendicular to the direction of

  the applied force the resistance to crushing is influ-

  first created by the compression of wood fibers.

TABLE I

  limit of the compression dynamometer A) Direction of the fibers parallel to the applied force Load applied Opening 'Opening Displacements Central lateral hole at the top (mm) (kg (kg) (kg)

2.54 399 394 403

, 08 576 576 499

7.62 803 816 621

12.70 1451 1696 1148

failure at 12.95 mm

(1606)

17.78 3,769 2,250

Failure at (2032 mm

22.86 4535 *

* Charge

-07167

  B) Direction of the fibers perpendicular to the applied force Load applied Opening Opening Opening Displacements Lateral central hole

(mm) - (k) k) -

2.54 367 413 363

, 08 503 535 440

7.62 680 694 508

12.70 1107 1084 826

17.78 1465 1383 1256

failure at 21.3 mm

(1637)

22.86 1737

25.9 mm failure

(1737)

  In Table I the designation "central hole" indicates

  a classic pine wood stamp with a central hole

  tral to allow the tampon to be removed from a coil.

  The designations "lateral opening" and "opening at the top" indicate spool plugs produced in accordance with the present invention, the plug being turned so that the removal opening is located respectively on the

  c 8 t or in the upper part of the buffer The results

  trent that the conventional pad fails each time before the threshold of 22.86 mm compression and a load of about 1640 kg are reached When the direction of the fibers

  corresponds to that of the applied force, the buffer presented

  as a central hole gives way under a compression load of

  1606 kg Gold the spool pads according to the invention

  withstand greater compressive forces When the direction of the fibers is parallel to that of the force

  applied and the pad is rotated so that the aperture

  ture is on the side there is no failure-

  launches when applying the maximum load of 4535 kg.

  When the opening for the same direction of the fibers is in the upper (or lower) part of the pad, the latter yields under a load of 3007 kg When the direction of the fibers is perpendicular to the force applied and the opening is on the c 8 tee the buffer yields under a load of 1737 kg However, when the opening is located in the upper (or lower) part, the buffer resists the same load without failure.

EXAMPLE II

  In this example molded wood pads are often

  put to a series of crushing tests We establish the means

  results obtained by subjecting the two types of buffer to several separate tests, which gives the values indicated in Table II. Only one group of values is collected since the molded buffers do not have the same fiber directional effects as those observed. for

solid wood pads.

TAB Il JAIJ II

  * Load limit of the compression dynamometer.

  In Table II the designations "central hole", "lateral opening" and "opening at the top" are used as described for Example I As for the molded pads tested the conventional pad with central hole yields under an average load of 2259 kg In the case of the buffer Load applied Opening opening Displacements Center lateral hole at the top (mm) (ki (kg) (kgl

2.54 445 526 467

, 08 771 771 621

7.62 1116 1102 807

12.70 2,227 2,372 1,524

failure at 12.70 mm

(2259)

17.78 4535 * 2794

22.86 4535 *

250 716-7

  coil manufactured in accordance with the present invention, the opening being located on one side of the buffer, no failure occurs under the maximum load of 4535 kg and for a deformation of 17.78 mm When the coil buffer is turned so as to bring the opening to the upper (or lower) part, there is no failure under the effect of the load of 4535 kg and a

  deformation of 22.60 mm It can therefore be seen that so many tam-

  solid wood pons as molded pads made of

  according to the present invention have a higher crush resistance than that of central hole pads

  made in the same materials.

  An example of the spool pad according to the invention is shown in enlarged view in FIG. 3 The spool pad 20 comprises a part forming a solid cylindrical body 21 which fits snugly in the end of a spool and a part anterior 22 in solidarity with the

  body part and narrowing therefrom

  Ci forwards to facilitate the introduction of the pad into the coil The outer face 23 of the coil pad and the cylindrical body part 21 have a

  diameter substantially equal to the inside diameter of the box

  bine for which the buffer is provided The inner face

  24 of the tampon and the patit, anterior 22 narrowing coni-

  have a diameter slightly smaller than that of the outer face 23 The coil buffer 20 has

  an opening or groove 25 which, remote from the center of the drum

  pon and located on the outer peripheral surface thereof

  ci, extends over the entire length of the pad In the case of solid wood spool pads the opening or groove can be made in the pad by milling, knocking out or drilling When it is molded spool pads

  the opening or groove may be during molding.

  As illustrated in Figures 4 and 5, the shape of

  the opening or groove 25 is not very large

  this However, to allow the introduction of a rod or

  bar for removing the pads, the geometry of the

he

  groove or groove must respect certain dimensions mid-

  nimales For example, the opening must have a minimum area

  male of about 129 mm 2 and a maximum area not exceeding

  about 20% of the total area of the exterior face of the drum

  pon Other dimensions relating to the opening 25 of a spool pad with a nominal diameter of 76.2 mm are for example a depth "au, measured from an edge of the pad, equal to or less than about 25.4 mm; a width "b", measured along the outer edge of the tampon, equal to or less than about 25.4 mm; and a distance "e", from the center line of the exterior face 23 of the tampon to at the bottom of the opening 25, equal to or less than about a third of the diameter of the outer face 23 In this regard it

  should be noted that in the paper industry are used

  reels of spool pads whose diameter varies between about 50.8 and 355.6 mm The conventional central holes of these pads have a diameter of between about

  , 4 and 101.6 mm Gold, in order to increase the mechanical resistance

  nique of a spool pad, the opening of the pad intended to facilitate its removal must be as small as possible Besides, the opening must be at least large enough to be able to receive the rod or bar

  normally used to remove spool pads.

  It therefore follows from the above that the spool pad of the present invention is distinguished from the spool pads of the prior art and thanks to this has a higher mechanical resistance than that of conventional spool pads. It should also be noted that the shape of the embodiment described in detail of the coil buffer of the invention has no limiting nature so that various modifications can be made to it without

depart from the scope of the invention.

Claims (8)

  1 spool pad to reinforce the   mites of tubular reels (15) for paper or the like and comprising a part forming a solid cylindrical body (21) fitting snugly in the end of a reel (15) and a front part (22) integral with the part forming a body (21) and narrowing forwards from the latter to facilitate the introduction of the tampon   (16, 17; 20) in the end of a coil, the outer face   upper (23) of the buffer having a slightly su-   lower than that of its inner face (24), characterized in   that the spool pad (16, 17; 20) has an opening   ture (19; 25) located at or near its outer peripheral surface and which extends over the entire length   spool pad to allow it to be easily removed from a coil.   2 coil buffer according to claim 1,   characterized in that the opening (19; 25) has an area minimum of approximately 129 mm 2.   3 coil buffer according to claim 2, ca-   characterized in that the opening (19; 25) has an area   not exceeding approximately 20% of the total area of the ex- coil pad.   4 coil buffer according to claim 3, ca-   characterized in that it is made of wood, plastic or   made of a wood-based composite material.   Reel pad according to claim 4, characterized in that the opening (19; 25) takes the form of a groove having substantially curved sides and a curved bottom.   6 reel buffer according to claim 4,   characterized in that the opening (25) affects the shape of a 2507167 '   groove having substantially straight c 8 tees and a bottom substantially flat.   7 coil buffer according to claim 5 or 6,   characterized in that the opening (25) has a pro   founder and a width not exceeding about one third of the   diameter of the outer face (23) of the spool pad.   8 reel buffer according to claim 7,   characterized in that the edge of the opening closest to the center of the spool pad is distant from this center by a distance equal to or less than about a third of the   diameter of the outer face (23) of the spool pad.