US1899252A - Buffing wheel blank plies - Google Patents

Description

Feb. 28, 1933- H. ZIMMERMAN BUFFING WHEEL BLANK PLIES Filed Sept. 25, 1950 .Inu EIltDI' Harry Zimmerman blanks when they are laid out upon the length Patented-Feb. 28, 1933' mm: PATENT?OFFICE},

HARRY zmmnmir, or romnrqowmmo, oaimnacassrenoa To BEULAH 1min:

zmmnm l'an or rononro, oiqranro, NADA L nmme wnann BLANK. runs 'Appllcatienflled September 25, 1930. Serial m.-484'=,4s1..

My invention relates .to improvements Wastageof material whichoccurs in the cutmethods for cutting. bufling :wheel blank plies from lengths of material,and is particularly directed towards the type of blank, from which a pleated regular hexagon shaped bufi ing wheel plyisformed. I

In this type of blankas shown in United States Letters Patent No. 1,669,224,:May 8th,

1928, to Frank Yerges, the blank is of elon-c;

gatedform, cut onthe bias inrespect to the weave and folded into parallel pleats soithati the resultant form of plyis substantially circular. I a

The object of my present invention is to form the blanks of such a shape that they are complementarytoeach other, in that there is no waste of material between adjacent of material from which they are .cut

'A further object of my inventlon is to so position the blanks in relation to the length A'still further and particular object of my invention is toform myblanksof a plurality of substantiallyindentical hexagonal figures each having two opposite parallel-sides ofthe same length as the sides of the regular pleated hexagon forming the ply, and the other four sides equal to each other, and of reater length than the sides of the hexagon p y.

My invention consists of a method for cut ting blanks all as hereinafter more partlcularly described and illustrated in the ac-,

companying drawing in which Fig. 1 illustrates a length of material having large sized hexagonal blanks formed therein, whereinno wastage of material 0c curs between the, complementary blanks;

Fig. 2is a similar viewto Fig. 1, the material having small sized hexagonal, blanks formed therein. i

' Fig. 3 illustrates a length. of materialhaving octagonal blanks formed thBIGlIl and from. which pleated octagonal bufl blanks can be made, such figure however showing the ting of octagonal blanks. 4 Fig.- 4 illustrates a hexagonal blank formed by joining two partial blank-portions, and

Fig. 5 illustrates a pleated hexagonal ply materialQ from which theyare cut, it will be clearly seen that these blanks. 1 Cannot be positioned in any way. complementary to each other, so that there is no wastage of material between the blanks, there being in fact" a large waste of material?) in'proportion'to the 7 area of the blanks. This type of blank is of course integral and can be formed into a pleated-ply of octagon form.

.,In my invention as illustrated in Figs. 1,. 2,4 and 5 I show the use of blanks of hexw agonal form, the blanks 4 illustrated in Fig. 1 being of greater length than the diagonal width of the length of material 5 across which they extend so that the blanks are cut froln, the material in the form of partial blanks, the partial blanks being joined together to form complete blankssuch as illus.-. trated inFig- 4.

In, laying out blanks in relation to the.

length of material for the production of blanks whichare on the bias to the we ave,,I

place two blanks, for example, 4 and 4,? end to end, and lay such blanks in diagonal relation to the width of material so thatthe longitudinal center line X passing through the blanks from edge to edge of the material is equal to the lengthof a complete blank.

By-this method the portions 4 and 4 will of course make a complete hexagonal blank 7 upon being joined together. The other blanks complementary to the blanks 4i and. 4 are also complementary to eachother, and

when the end to end portions are joinedtogether will formcompleteblanks, for example, when the portion at is-secured to the end of the partial blank/i? 1a completehex-i, agonal blank will be formed. 7 c

Upon further reference to Fig. 1 is will be seen that in cutting the blanks of hexagonal form and in accordance with my method that there is absolutely no wastage of material between the complementary blanks, and that the only wastage in the material length will be as the ends which of course may be very far apart, wherein a certainwastage must occur, as of course there is not suificient' material at these points to permit the forming of partial blanks of the same size as the. blanks throughout the length of material. These waste portions can however be used for making smaller sized blanks. V j V It will of course be appreciated-that in many cases it is advantageous to produce comparatively small blanks 8 from material of the same width as the material illustrated in Fig. 1, and in such a case as illustrated in Fig. 2 the blanks can be so laid out upon the material that instead of the edges of the material passing through two blanks which are laid end to end, that it is possible to have a'central integral blank 8 and two partial blanks 8 and 8 extending from the ends of the integral blank. In laying out these blanks as illustrated in Fig. 21 place the integral blank 8 and the partial blanks 8 and 8 in diagonal relation to the width of the material so that the longitudinal central line Y passing through the blanks from edge to edge of the material is equal to the length of two complete blanks. The other blanks are complementary to the blanks 8 8 and 8 and are also complementary to each other,

and when the portions bounded by the edges of the material are joined tog-ether will form complete hexagonal blanks." The partial blanks are sewn or otherwise secured together as illustrated in Fig. 4, and

are then pleated into the form illustrated in Fig. 5. The sides of the blank illustrated in Fig. 4 being of course the sides of the blank illustrated in Fig. 5 after such blankj is pleated.

It will be apparent in the use of my particular method for cutting blanks of the form described that I need only use material of a standard width from which blanks of any desired size may be cut, thus obviating the necessity of stocking materials of different widths for the manufacture of different sized blanks. It will of course be also understood that after the blanks are pleated and sewn that the centers or arbours are punched there in and the peripheries and blanks cut into circular form. 7

From the foregoing description it will be apparent that I have devised an extremely efiective method of cutting blanks'of the character described from lengths of material wherein no wastage of material between the" complementary blanks occurs, and although I have shown and described my blanks as set in a particularrelation to the length of vention which contemplates the use of a hexagonal blank and the laying out of such blanks upon the length of material in complementary blank form. v

What I claim as myinvention is:

' i A blank for-a pleated butting wheel ply of regular hexagon form, comprising a hexagonal piece of material having all its angles iobtuse angles,- two sides of which are the same length as the sides of the regular hexagon pleated blank and the other four sides 0 which are equal to each other and of greater length than the sides of the regular hexa on and. adapted to be shortened by the p eats. Y i Q 2. A method of forming abufiing wheel ply of aplurality oflequal blanks of elongated hexagon form, comprising the cutting out-of the blanks by a plurality of cuts, each cut forming an edge of each of two adjacent blanks,- some of the blanks being complete and some of the blanks incomplete where they are bounded by the edges of the material from which the blanks are cut, joining the complementary portions of incomplete blanks to form complete blanks, pleating the complete blanks crosswise of their length so that they are reduced to substantially regular hexagon form, and laying a plurality of such pleated blanks together to form the bufiing wheel ply.

3. A method of forming a bufiing wheel ply of a plurality of equal blanks of elongated hexagon form, in which two sides are equal and the other four sides equal to each other and of greater length than the two sides, comprising, the cutting out of the blanks by a plurality of cuts, each out forming an edge of each of two adjacent blanks,

some of the blanks beingcomplete and some of the blanks incomplete where they are bounded by the edges of the material from which the blanks are cut, joining the com plementary portions of incomplete blanks to form 'complete'blanks, pleating the complete HARRY ZIMMERM'AN.

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