GB2224997A - Magazine for fastener members - Google Patents

Description

2224997 1 - 1.

A Magazine for Fastener Members.

The invention relates to a magazine for elongated fastening members such as screws.

Sc fal- such fastening members, as for instance rivets, nails, screi-.,s and the like have been stored in a random manner in 5 birs. Since the members are not systematically orientated it is -1 ing members very dif.11CUlt to regularly extract individual fasten.

Id at -o mani- -e them while he.

from the:-.In for fui.-t.4er use and t pu 1 a t a ai%,en anale for actual use. This is more especially a disadvantage in the case of conveyor belt production in manufacturncr operations, if a the fastening members are to he processed mechanically using robots or other handling equipment. For th.'s reason one object of the invention is to devise a magazine of the initially mentioned type which makes it possible to offer up fastening members in a regular angular position so that they may be taken up by a machine without any difficulty. Furthermore, the magazine should be simple and cheap 'n 'erent construcl-icn and be able to accept fastening members of dif j dimensions. ion in order to achieve these and/or other aims, the inventi -ed fasten, provides a magazine for elongat- ng members having a led receiving channel extending in plane and ada-rted -irally cci.

s-r? I - to have a queue of consecuti%)ely arranged fastening memnherE arranged in -., which each have at least one rr.,em"-er art in the w.l,h an identica. alignment, s-'-- channel' and are arrancre- is receiving channel beincr defined by a spirally wound elastic spiral spring so that the breadth of the receiving channel as measured in a direction transversely of the length direction of the channel may be varied for adaptation to different dimensions of the member E the density parts in the channel with an increase or reduction o of coiling of the spiral spring.

Such a magazine ensures a high packing density so that it -or a large number of fasten' is possible 1. Lng members to be stored in a very small amount of space, even although the design of the magazine is relatively simple, since the main component is a spiral spring which may be produced at a low price and between whose radially adjacent turns the storage channel is formed.

'-he sry-ing there is furthermore the Owincr to the elasticity oL 1 possibility of simply adapting the magazine to suit different dimensions of the fastening members. One and the same magazine may be thus be used for storing different types and dimensions members. in order to change the width of the channel it is wenerally onl,,,- necessary to move cne end cf the zi--ri of the coil so that owing to 'the -n,g in the direct spiral spr... 20 elasticity the channel width will be varied along the full length - along the of the chanr-.,e,'. This change J_. preferably constant entire length of the channel. Since all fastening members stored in the magazine have the same orientation, the of individual fastening members may be carried out Simply by maci.-.e.

Furthermore, the magazine may be used for holding fastening d ferent lenath.

elements c. L Advantacreous further developments cf the invention are described in the claims.

in acccrdance with further features cl' the inven.'1--n the adaptation of the channel breadth to the dimension of the Part cf the -,,e-,iber to be rece.-,e-u therein takes place introducncy the said parts c--- the members in the receiving c,-.r---,- :"z and the s-jra. Spri.nz a-chcred in the cf, c-e en' more Part, arly at the ctrier (outer) end i-, arrange- 51 able to move. These features mean that there is an automatic adaptation of the channel breadth to the dimensions of the type of the fastening members for which the magazine happens to be required, something that facilitates loading the magazine. Owing to the resilient elasticity of the spiral spring the turns of the spring constituting the walls of the channel always adapt themselves to the outer periphery of the fastening members.

In accordance with a further feature of the invention the spiral spring is anchored in the vicinity of the one end of its coil and there-is an adjusting means which is spaced from this point of anchoring and is preferably placed at the outer end part of the spring so that the channel breadth may be adjusted b.,,; such adjusting means. In the outer end part of the spring the latter may be arranged to be able to be moved to and fro for such adjustment. These further features of the invention lead to the advantage that the channel breadth may be adjusted from the.he magazine. I outside and this facilitates loading 11. Lt is for example possible to set the magazine to a somewhat largrer breadth during the lloading operation and then to reduce it towards the end of the loading operation until the channel walls make guiding 4 contact with the parts. of the fastening members.

In order to Drovide for particularly economic production of the magazine device the spiral spring is so designed that it has a rectangular form as viewed in a cross section through one of its turns, the longitudinal sides forming the wall faces which are transverse with respect to the length direction of the channel.

being aligned in such a manner that the spiral spring has the configuration of a wound length of spring steel strip.

In order to facilitate handling of the device in such a way that, r-ore removal of the fastening rre,-,,hers in an upward direction is Dcssible, the plane of the hor.,--on-'t.al in the working position of the device.

In ercer t.--% lead to a hJ,-.h density of packing of the fze.-,irz n-,embe-s the macazine may be so desianed tlat th.

ast -.4 - longitudinal axis of the fastening members extends parallel to the axial direction of the spiral spring.

In order to achieve an optimum guidir Efect on fastening I ng ef, members of the type having a shank with a head, such as more especially screws, the members are arranged so that the respective shank extends into the channel transversely in relation to the plane of the spiral, while their heads rest on a side of the spiral spring directed in the axial direction and rest on the turns of the spring forming the channel walls.

The magazine may furthermore comprise a thrusting device able to move the fastening members along the length of the channel. This thrusting device may be arranged to cooperate with the one end of the queue of members in the magazine while at the opposite end of the queue of members for the members there is a point at which the fastening members may be removed and which is provide--- a removIng device.

Furthermore the thrusting device may include a pivoting arm able to turn ab-out a pivol. axis running in the axial direction of the spr:i.r.c-. ccil and which has a thrust member which is slidingly mounted on it and which acts on one end of the queue of C 1 fastening members guided Jin the receiving channel, it preferably being mounted on the pivot arm so that it may move in the radial direction in relation to the axis oil rotation. The pivot arm may be provided with a spring or a motor for driving it. The magazine may have a central core to which the turns of the spiral spring are adjacent and which has the thrusting device arranged on it.

These further features cf the invention facilitate the removal cf individual fastening members since the thrusting device ensures that the overall arrangement of the fastening members is fed bodily in steps whenever a fastening member is removed at one -t- is mcre p-zrt-.-icu.larly possible te- provi.e a point all elither. end c-.F the receiving channel to which Che i-.,e.T-,bers are mc-ved bby the device.

' now be f,,-,r--her, I re-e,-c--ce The L W 1. . - Z - to the accompanying drawings.

Figure I is a diagrammatic view of a - work.

firs'.. ing embodiment of the magazine in accordance with the invention as seen in perspective.

Figure 2 is a cross section through the magazine of figure I taken on the section line - II-II of f igure 1.

ected transversely in relation to the length, the Figure 3 is further diagrammatic vIew of a working example of the invention in plan.

Firsitly, a description will be provided of the magaZine for elongated fastening members as shov,n iin figures 1 and 2. It comprises a spiral spring 2 which is spirally wound in a plane, which herein, wi.1 be referred to as the spiral plane. it consists of a material with resiliently elastic properties. The axis 3 of winding of the sp.ral spring 2 runs through the center thereof and is at a right angle to the plane of the spiral. The turns 4 of the spring 2, which are opposite to each other in the radial direction in relation to the axis 3 are spaced from each other in the radial direction and the space therebetween forms a continuous spirally coiled receiving channel 1 which also extends in the plane of the spiral. The turns 4 of the spiral spring 2 thus E the channel extending constitute laterally opposite walls 6 of along the length of the channel, all channel walls 6 being -he single coiled bo- combined tcge-ILher in the form of 16 Ilty forming he breadth of the receivIng channe. I as the spiral. spring. ".

-he radial directf"--n in relation 'to the sa.d axs 3:S measured in preferah.y generally constant along the full le,-..gth iereThe spiral receiving charnel I serves to receive a ---e--,e of fastlening members 7 which are placed consecutively in the length direction 5 of the channel. In order to render the drawing more readily intelligible, figure 1 only shows a few cf the fastening members which are arranged in sequence in the receiving channel 1. Dependent on the specific details of the magazine it is possible for each fastening to be only included in the channel 1 for half of its length. In the illustrated form of the invention however the fastening members only have part, referred to as the member 8 in what follows, of them included in the receiving channel 1. Thi's leads to advantages which will be described in what follows.

All the fastening members 7 have their member parts 8 so arrancred Ln the receiving channel 1 that they are identically aligned or angularly positioned. In order to favor a -particularly high density of packing the orientation of the fastening members is so selected that the longitudinal axes 9, which are in parallelism to each other, are parallel to the axis 3 and in consequence at a right angle to the plane of the spiral. Thus the secruentially. placed fastening members 7 are respecIlvely laterally juxtaposed. to utilize the magazine for hcld.Jr.a in order to be able 1. 1. different types of fastening members and of fastening members with different dimensions, the breadth of the receiving channel 1 as measured in the radial direction may be adjusted. Dependent on whether the breadth dimensions of the member parts 8 are larger or smaller in size, a larger or smaller coil density of the spiral spriner w- 21 be suitably set. In the case of the wo rkincr example the of the invention shown in figures 1 and 2 the inne.r end IC of s1 ing 2 is the one that is anchored.on the other hand pLral spr-ab' the opposite, outer end 14 of the spiral spring is adjust le in position and r-,,ay be moved generally in the lona,,'.,udi:-,al direc.-i---. 5 of thee channel to and fro (see the d,2u.ble arrow 15), De-Pendent on which c.E the two directions the en.d 1,4 Ls to be mcve,.z in. t.,ere is - as a cn-nsequence of the other stationary end in. ---:

r, simultaneous radially directed extension or contraction c..F the spiral spring. When this takes place there is a reduction er increase in the size of the breadth of the receiving channel 1 along the full length thereof. owing to the desired resiliently elastic properties it is best for there to be an at least substantially constant change in breadth along the full length thereof. It is thus possible to slide the outer spring end 14 in the one or in the other direction to as to vary the breadth -o the dimension of the receiving channel 1 and thus to adapt it 11 breadth of the-member parts 8 of the respective fasten.ing members 7 to be stored in the magazine.

Tr, order facilitate adjustment and to be able to maintain a respect.,-1e setting for the outer end 1.4 there is an adjustincr device 16.

Preferably the spiral spring 2 is arranged on a base 18 servinz as a carrier. 1- the -resent working examnle it has the tute- a frame or base cl the form of a plate and lt -ray be constIt L apparatus. or machine bed for instance. The spiral spring 2 is so placed that -.!-e siCe 17 facing al-,.-ic the axial direction of the windinz or coil rests on an even supporting surface 19 of the base 18 and al.' its turns 4 are supported in the axial d,'Lrez,.C:-, 3, Preferably the base 18 simultaneously serves as the carrier for the adjusting device 16, which in the present working example is particularly simple in design. in fact, it only comprisses a lug 20 extending in parallelism to the length direction 5 of the channel or tangentially thereto. At a point past the free enC, 14 it is pivotally attached to the base 18 for swivelling about the a pi,o, axis 415 extencling in parallelism ot the axis 3. A slot. 21 + and th, formed in the Iu-s 20 has a. bolt 22 extending throagl.-4 11 s bolt is arranges. on the radlially outwardly facing sIde 2-^ at the end 14 of the sprir,.z 2 sc: that the bollt exl,e,-.:s in a lly cut zic.,-.Usinc a nut 24 screwed = the radiz- direct 22, as example a nut in the.',-rj-n e_f a wing nut, the lug 2^,, breadth of the channel is to be modified, all that is required is to loosen the nut 24 whereafter the end 14 of the spring may be adjusted as indicated by the double arrow 15. At the same time the bolt 22 will be shifted in the longitudinal direction of the slot 21 and when the desired breadth of the channel has been set, it is merely necessary for the nut 24 to be tightened again. The pivotal arrangement of the adjusting device 16 ensures a certain allowance for the reduction or increase in the diameter of the spiral spring, which automatically takes place when the end of the spring is reset-in its position.

It will be clear that other adjusting devices besides the device 1-6 as described would be possible. However it is in all cases convenient if the adjustment device is so devised that it is possible for the spring end 14 to be able to be moved radially as well so that any changes in the radial size of the spring may be taken into account.

The working example of the invention shown in figure 3 is adapted to do without any adjusting device!6 and the spiral I its ends. In this c&,Ee '"te spring 2 is only anchored at cne of spiral spring is additionally so prestressed that it has a tendency to assume a position in which all its turns are in engagement with each other. In the case of this design insertlon the f as' -F I Uening members causes an automatic v:-:--'.ening o- Lhe gap between the turns of the spring and thus an aut6matic adaptation of the channel breadth to the dimensions of the member parts which L n 4 are I %.he storage channe L.o be accommodaed ir As will be more partIcularly seen frcrir, figure 2 the spiral spring 3 used in the embodiment has a rectan(ular cross sec+..--;-l the long sides 29 being radially aligned and the faces 30.1cr.m".-g the channel walls 6, against which the membe,.- parts 8 present in the storage charnel run. This embodiment of 4L'-'C- inventic-T, iss facture and ensures F- very gcc' dezree particularly simple to m-== -P - - fc r c f a -y. The S -ring 2 thus here in t,-;e c.L e',aSLc,,'L cciled strip spring.

- c - Apart from the fact that the plane of the splral spring 2 as seen in some field of application in the working position is able to be arranged in a vertical plane or for that matter even in oblique one, it is more especially an advantage in the present example to have the spiral in a horizontal plane in the working state. In this case the fastening members 7 may be inserted from above into the device and then removed again in an upward direction.

The working example is more particularly suitable for storing fastening members, which have a head 32 and a shank 32 extending therefrom in the longitudinal direction 9. In the case - is a question of these fastenlinc members of the working example it - C c., screws, whose heads 31 are in the form of a screw head while the shank represents a length of threaded rod. A411 the fastening members 7 are plugged into the receiving channel 1 in a downward direction so that the shank respectively lies in the channel with 1 1 th T the axis 9.here--f pp-arallel to the axis 3 of 1.e coiled body. he shanks ---2 in this case form. the member parts 8 and the heads 31 are locateed outside and above the storage channel 1. They have the function of abuld-nents since they limit the depth of penetration in realticn to the storage channel 1. Th.Js is because the oppos.te parts thereof next to the respective shank 32 and forming axial end head parts 34, are resting on the topsIde, remote from the base 18, of the two respective turns 4 delimiting the respective part of the storage channel. Given a suitable selection of the breadth of the channel walls as measured in the axial direction, it is thus possible to store all types of fastening members 11 whatever their shank length. in some cases it may also be appropriate to have recesses in the base 18 in cr-ler to accommodate the shanks without jamming thereof.

The device as in fIgures 1 and 2 is in addition ecu.,pped I r c- w, 1. h a t hru s t i n -g d e v, c e 33. -1 w., t h 1k-, e a J1 d c 'L w h... c: h t ll., -- -- t - - -fastening members 71 may 2De propelled along the cha-,4-.el 5. -7h._ -eni.ngr member near the thrustii-.T device.4 acts on the last fast -n - external spring end 14, of the stored queue of members and presses it in the longitudinal direction 5 of the channel as indicated by arrow 41 towards the end of the coil with the smaller diameter.

Owing to the engagement of adjacent fastening members the entire member queue is urged inwards in the direction of the spiral, the last fastening member V, nearest to the axis 3, of the spiral fastening queue being forced into engagement with an abutment 35. Thus this abutment 35 defines a discharge point 36 adjacent thereto, at which the individual fastening members may be removed consecutively from the queue receiving channel. When the respective fastening member 71 engaging the abutment 35 has been removed the thrusting device 3,4 ensures that the remaining fastening members follow up so that a further fastening member - the abutment 35 and J runs up against s positioned in the removal position.

thrusti The ncr device 34 whicli J-. so advantageously conceived in the present wcrl,,.-,.g embodiment of the inventlon comprises a pioting arm, 37, which is mounted at a central ral spring 2 rocking mction.

-ed that its pivot axis 38 coincides with Preferably it is so pivot 1 ially. outwards and the ax..s 3 of the spring coil. It extends rad& its length as measured in the radial direction is generally equal to the diameter of _ithe spiral spring 2. Its distance as measured in the axial direction from the top side of the turfis 4 is larcer than the length, as measured in the axial direction 9, of the heads 31 so that there is no chance c-E cbstruction cf the queue of members. A thrust member 39 is mounted on the pivoting arm 37 so ten,' outwards frcm the - 3 a s t L. e ' 1,.lvotincr arm ll dc-.jp,,-jards towards the spIral spring 2 so it 1. opposite to the f-st Iasten:-,9 - 1 L. - '. L 11 1 0 member 7'1 of +.he,riem, ber queue in the longilludin-al directicn 5 -, f the channel. In the illustrated form c-F the i-venti--n the extends Inte- the associated sec'-l:cn ef the receiving channe.' 1, E- --- - te s:, deE= th1 bull-:t E a,.,,:eve:

that.' e-"-- d.;--er-,t'-.- -;z.-cve the t--: eae cf the -,s 7,-- :9 L design given by way of example does however offer the advantage that the receiving channel 1 may serve to guide the thrusting member 39, which is furthermore guided by a guiding device 40 on the pivot arm 37 in its length direction and thus is guided 5 slidingly in the radial direction in relation to the axis 3.

By means of a spring arrangement 44, which bears against the pivoting arm 37 and a bearing part 45 stationarily fixed to the base 18, the pivoting arm 37 is urged in the direction 41 of rotation.

This ensures that the queue of fastening members is continuously urged by the thrusting device 34 towards the abutment 35. After the removal of fastening members 7' the pivolitng arm 57 performs one respective pivoting step as a result of which it displaces the member queue sufficiently to cause a further fastenina member to arrive at the abutment. Thus the pivcting arm 37 perflormis a further movement in the form cf a step ss that, dependent on the number of turns. it may be a questiGn of more than one revclution. The fact that 1Che thrusting member -'9 is able t slide serves to allow fcr the reduction in the radia.

distance of the receiving channel 1 from the axis 38 of pivot t lace as rotation of the pivoting arm continues.By way of tlal-i-,g p act that it fits into the the guide device 40 and owing to the 1. receiving channel 1 the thrusting member. 39 is guided like a cross slide.

it will be clear that the thrusting device 34 may also be so desic.:p.ed that it is driven by power.

It is an advantacre if there is a core 46 arranged at a central point in the spiral sp.-..ng for pivotally mounting the pi,,c- arm, such ccre being mcre especially detachably Becured tc- the 11base 18. It then alsoconveniently constitutes the bearing the member- 45. Furthermere it may serve to stationarily mc,,int inner end 10 of the spring if, as illustrated, the last inner7est lly encircles the least part turn 4' c-L' the spiral spring 2 at k 1 is he:'- -a, -ah' - whch '- rr,,cre especially and J d et ' 4 - 1 1 1 in place thereon, for example by a screw..

It will be clear that for removal of the fastening members at the removal point 36 it is possible to provide a removing or ejecting device, which is not shown in detail.

As made clear by figure 2, it is not necessary for the turns 4 of the spiral spring 2 to rest on the base 18, and in fact it is possible for the turns to be arranged with a space between them and the base, the respective lower edges being indicated at 48 by way of example.

It is also appropriate to point out that the fastening members may be arranged with an alignment in relation to the spiral spring which is different to the relationship shown. The illustrated form of alignment is however particularly convenient as regards handling and compactness.

While in the designs according to figures i and 2 the spiral spring 2 has four turns, in the design of fiallare 3, in which identical parts are denoted by identical reference numerals, there is essentially only one single turn 4. Furthermore, th.-design of the device is a mictor-driven thrusting device 34 and all 49 the motor is indicated in chained lines which is accommodated in the ccre 445. In this design the feed of the fasten-ing queue is in an outward direction so that the removal point 36 is in the vicinity of 'Llhe outer end 14 of the spiral spring 2. Accordingly in this case the abutment 35 is also adjacent the buter spring end 14, it being possible to have a removal gap 50 constituting the removal point 36 between the spring end 14 and the abutment 25.

In the design of figure 3 there is also a realization of the prLnciple, described above, of automatic adaptation c" the 1 '14- breadth cf the receiving channe' 1 since the spiral spring 2 is - of it is able tc only secured at the inner end 10 and the rest move.

Both %,he -1,.,orking examples cf the invent4cr, may cbvicusly be operated ---. a dIfferent, manner to that indicatea in i---hich tl-le fasten.ng members is p.resse- in 41 respective queue of th e opposite direction. For this purpose only a few structural modifications would be needed.

claims.

1 A magazine for elongated fastening members having a spirally coiled receiving channel extending in plane and adapted to have a queue of consecutively arranged fastening members arranged in it, which each have at least one member part in the channel and are arranged with an identical alignment, such receiving channel being defined by a spirally wound elastic spiral spring so that the breadth of the receiving channel as measured in a direction transversely of the length direction of the channel. may be varied for adaptation to different dimensions of the member the channel with an change of the density of co.,.'ing of parts in 41 the spiral spring.

2 A magazine as claimed in claim 1 wherein the adaptation of the breadth of the channel to the size of the said respective member parts to be received therein takes place automatically on introduction of the said member parts into the receiving channel.

3 A magazine as claimed in claim 2 wherein the spIral spring is fixed in place at one end of its length and is otherewise arranged in a loose manner, more particularly at the other opposite end part, preferably the outer enc- part.

4 A magazine as claimed in claim 1 wherein the spiral spring is stationarily secured adjacent to one end of its length at a distance from this end part, and more particularly at the opposite outer end part the spring is provided with an adjust,.r.g device for adjusting the channel breadth and locking it at such adjusted breadth.

A magazine as claimed in claim 4 wherein the cuter enC part of the sp. C piral spring is able to be adjusted backwards an.' ",-,rwards in 4-'he length direction of the spring maIr-a.

4, L- - 1 Z 6 The magazine as claimed in any one of the claims 1 through 5 wherein as seen in a cross section taken through one of its turns has a rectangular outline with the long sides of the rectangle forming wall faces of the channel walls, which wall faces are transverse in relation to the longitudinal direction of the channel so that the spiral spring is in the form of a coiled strip spring.

7 The_magazine as claimed in any one of the preceding claims wherein for the lower side of the spiral spring facing in the axial direction of the spring same is provided with a support face, on which the spiral spring is borne and which may be in the 1 a base such as a frame of a piece of equipment or a f orm o support.

8 A magazIne as claimed in any one preceding claim wherein in the working position of the magazine the plane of the spiral is horizontal.

9 A magazine as claimed in any one of the claims i through 7 wherein in the working position of the magazine the plane of the spiral is vertical.

A magazine as claimed in any one preceding claims ' wherein the longitudinal axis of each of the Fastening members IS aligned with the axial direction of the coil of the spiral spring.

11 A magazine as claimed in any one of the preceding claims wherein the fastening members each have a head and sharik and are more particularly in the form of screws arranged so that each shank forms a member part extending perpendicularly to the Plane of the sp.ral and into the receiving channel, whereas the 1 heads o..',-,e screiys are on a side of the spiral sprIng fac-,', along the axis thereof so that heads are on turns of the spring forming the walls of the channel.

12 A magazine as claimed In any one preceding claim further comprising a thrusting means for moving said fastening members along the channel In the direction thereof.

13 A magazine as claimed In claim 12 wherein the thrusting means Is arranged so that Its one end cooperates with a first end of the queue of fastening members arranged in the magazine, a second end of the said queue remote from said first being at a removal point of said magazine, for which a removal means is provided.

14 A magazine as claimed in claim 12 or claim 13 wherein the thrusting means comprises a pivoting arm arranged to revolve about a pivot axis aligned with the axial direction of the spiral spring and placed in the center part thereof, said arm being provided with a thrust member, which is more especially mounted in sliding manner thereon and which is adaptedto propel the queue of fastening members in the receiving channel by engaging one end thereof, said end being preferably arranged on the pivoting arm so as to move therein in relation to the pivot axis.

A magazine as claimed in claim 14 wherein the pivo.t arm is provided with spring loading or motor means for driving It.

16 A magazine as claimed in any one of claims 12 through 15 comprising a central core adjoined by the turns of the spiral spring and preferably having the thrusting means arranged on It.

Z 1 17 17 A magazine for elongate fastening members, the magazine having a spirally coiled receiving channel extending in a plane and adapted to receive a queue of consecutively arranged fastening members therein, whereby each of the latter has at least one member part in the channel and the fastening members are arranged with the same alignment, the receiving channel being defined by spirally wound resilient means so that the width of the receiving channel, as measured in a direction transversely of the length direction of the channel, may be varied for adaptation to different dimensions of the member parts in the channel with a change of the density of coiling of the spirally wound means.

18 A magazine for elongate fastening members substantially as described hereinbefore with reference to Figs. 1 and 2 or Fig. 3 of the accompanying drawings.

Claims (1)

19 Any novel subject matter or combination including novel subject matter

disclosed in the foregoing Specification or Claims and/or shown in the drawings, wh-ether or not within the scope of or relating to the same invention as any of the preceding Claims.

Plultlishe19K'&.ThE Pat Ent Of.',-e_Stat-H-,ic- 6r -: H,.g- H-t-rn L_n4crWZ!F 47F F_rti-.vrc-pie5T:ia.y be obtamedfrom7nePatent Office Sa..e, Brancl S M-7.- cra': C'.-P.nr- n Hcn EM- 3R' Prir.E-4 ty M-_'nP:eY' tech'.q" jt: S Mary Cray Kr-n't. c7n 1 8-