US931830A - Material-cutter. - Google Patents

Description

H. ZIMMERMAN.

MATERIAL CUTTER. APPLIATIO'N FILED SBPT.17,1907.

Patented Aug. 24, 1909.

2 SHEETS-SHEET l.

H. ZIMMERMAN.

MA'IERIAL GUTTER.

APPLIATIoN FILED.SBPT.17, 1907.

Patented Aug. 24. 1909.

2 SHEETS-SHEET 2.

.E 'NSQ E, M ATToRNEY feo Unrrnn STATES Parenti Frio HARRY zrnnnnnAN, or rnnn'onr, onto.

' MATERIAL-Curran, 1

i which the following isa specification. 'This invention relates to cutting material, and more particularly to prolonging the usefulness'of the cutting element las Well as so congnring the elements that they may Vbe readilyfreed from the material while they are permitted to so act together as-to bring aboutthe most economical cutting by reducing the waste.

This invention has utility Vwhen embodied .indios for'cutting fabrics, especially a plurality of thicknesses ofifabric at once, asit will not only directly penetrate the goods, but is easily Withdrawn, excessive congestion lbeing avoided. Whatever binding occurs is within the die and-therein is so disposed as to minimize strains on weaker portions of the die, as the angles. Furthermore this inwardly directing wedge action of the cutter takes ,places only where the series of cutters 'abut jor nearly abut each other, thus preventing the cuttersv from working against eachother. The result of this. is that .the cutters tend to seek each other and thus automatleally bring about the most advanteh geous cutting by eliminating to the greatest degree possible intermediate waste This lineofaction is so close that not" even a ting portions of the dies. -V

Referring to the drawings: Figure perspective view of thev embodiment of the vinvention in an endless die; Fig. 2 isa plan View of a group of dies; Fig. 8 is alongitudidie ,shown in 5, illustrating its action on thematerialto be'cut; and Fig. 7 is a Speocatn of Letters Patent.

Application led September 17, .1907. Serial No. 393,341.

portion ofthestiening wall.

thread of fabric remains betweenthe abut-l lis-a nal section 'of one of the dies on line III-III Fig. 2; Fig. 4' .is a Vtransverse section of the dies on line IlV-IV Fig. 2; Fig.v 5 is a' bottom: plan view of one ofthe dies `shownvin Fig. 2; Figf is a longitudinal section of --fview in usection similar to line IVIV Fig. n j- 2:.e`xtended to include a portion of third die, i, a}so illustrating action of the dies on the ing the Waste to a minimum., lith dies of form illustrated, an arrangement'longitudinally parallel'as shown in Fig. 2 most nearly uses all of the goods. lVith this arrange nient 4accordingly Vthere should not be a Wedge action between the dies to push'thein away from each other as they penetrate the goods, and 'the longitudinally extending walls have the incline or bevelto congest the goods in the die in the intermediate portions No ill; effects follow from this thereof. binding as it does not become excessive, the terminal portions -of the die having freeing 'wallsf At one terminal the wall 4 is between the reversely extending walls 5, 6; while at the remote end, wall 7 connects walls 8, 9, which extend in reverse directions. These portions 4, 7, not adjacent the walls of the dies Withwhich the grouping is to be had, Aflare or have the bevel on the outer side, the inner side being nearly perpendicular to the entering edge, or there may be a slight inoline outwardly to still further free the fabric cut, thus thrdwing loiverportion l0 of `Wall 4 wit-hin the length of the top of the die.

From' the position of the entering edge` adjacent the inner side of the stiffening wall at portion 10,-theentering edge in following the'fori'nl `of thedie crossesgrelatively to the stiffening wall at edges ll, l2 to theouter Likewise, edge 13 underthe wall portion 7 vis near the inner -side of die wall and connected by edges .14, l5, to the longitudinal runs of edge 2 which are adjacent the outer edge of the stiffening wall 3. The configuration of the stiffening Wall is thus different from that of the cutting. edge, the wall Haring outward at those points exterior to the Grouping of the i material cutters. The dies ar of the regular form as to action line of cutting edge, but the stifening Wall is staggered relatively thereto.

Werel the bevel continued directly down the stiffening wall on one side only to render sharp enough for a cutting'edge, this would,

lcause action of the material through which the cutter operated to act all against one (the beveled) side ofthe wall, the lower portion of which must be so thin that in heavy work lturning or fracture would follow. To insure against' this trouble, in dressing the entering edge, it isgiven a very short counter bevel `l6 of such angle that the edge has strength to withstand `Work of cutting, but soshort that abutting diesV by wedge action on the Patented aug. ai, i909..

inner sidesof the adjacent walls hold the dies so closely in contact that a thread may not be left therebetween. As there is no intermediate congestion, there is no forcing of the dies apart as they are forced intothe material. In reality', they Work toward each other.

In the group cutting, a plurality of dies are arranged in such manner as to cut to the greatest advantage, the dies'being provided with brackets 17 which loosely engage rods 18. The rods 18 with end bars 19 constitute aframe for the grouping of the dies.v In operation, an end die is set at the proper.

point near the edge of the plurality of thicknesses of superposed material, and the remaining dies yare slid along to iit against eachother from the end die. As power is applied, the" parallel abutting walls, as shown in Fig. 4:, tend to Work with each other, automatically maintaining the most economical cutting relation While mutually staggered over, transferring the Wedgmg action-outside of the die to thrust the material away from the set or grouping (see Fig-3). In the embodiment shown, this change o'f wedge or Haring is about the terminals and besides freeing the material coming into the die near the ends, is a feature of increased strength for the' die as the Wedging is now against the outer or convex portion ofthe die instead of the inner or concave.

The action against the convex side of the wedge,

* brings the reversal portions of the end walls to mutually coact. in withstanding Vthe strain, While if the outer side were straight and the inner part of the end beveled there would be no wedging or resistance on the outer side of the wall, while Wedgin on inner side would tend to force'all asun er.

The grouping of the dies without rigid confinement, imparts such flexibility to the system that unequal resistance is not liable to injure the Whole set, while if one should meet with accident, it may be more cheaply replaced than if a unit, while thev result is as a u nit multiple form die so far as economizmg material 1s concerned for inasmuch as between, better results could not be obtained.

The invention, :besides bringing about maximum economy in cutting, permits of most ready freeing from the material, -as

well as produces a cutter of great strength, and therefore, of long life. The -freeing from intermediate material' is due to the parallel outer' walls between the dies, so giving no binding action. In addition, the

loose assemblage of the group enables them`- .to easily space from ,ea-ch other when with# drawn, and all the outside material at once falls away. The cut pieces, having the regular form of the cutting edge for the particular form desired, are uncompressed or free in one direction, which with the die shown is the longer way, while in theopposite or'transverse direction the pieces are somewhat compressed. lVith thin material, as'cloth, which may be piled up to two or three-inches of thicknesses, the severalpieces 'as they are cut in multiple and as they move up between the wedge faces tend to bulge 'medially, which is readily permitted owing Awhilethe adjacent die walls are elfective medial reinforcing means.

The counter lead 16 of the cutting edge lui) i brings the -action part ofV vthe die underv aconsiderable portion of the-stilfening Wall, making it strong in resisting compression, while the contour of the edge is such that in operation it will not tend to buckleor liex out of form.

The reversals at the terminals form interior angle having convex exterior Wedge Walls.

What i'sA claimed and it is desired lto secure by Letters Patent is:

`l. A dieh'aving a' peripheral entering edge and a stiening wall therefor having each side staggered relativelyto said entering edge. j

2. A material cutter having a peripheral stilfening wall with an entering edge staggered to opposite sides of the'medial line of the wall. v

3. A die having a peripheral entering edge in conguration'extending in reverse directions in a common plane, and a stiHening wall for -the edge oppositely disposed to .the edge adjacent the reversals. where the edges abut there is no material left 4. .A die having reversely extending Walls, and a peripheral enteringedge in a common plane for the wall oppositely disposed to the walls between the reversals.

5. A die forcutting material, having an entering'- edge. of' interior leA f orm iipon an internal wall, `remotely fg om the angle v con esting .the material and locally .to the i cutting edge in a common plane andliaving aplralityof alternate exteriorly. adinterie A orly directing-.wedge'walls for the-'materialg -7. A- plurality of rind'e'pendent abutting 'diesf-having entering'. edges and stiening l tion of the material tool-1e direction in ythe grouping of the dies 'comprising a bar :on which theldies areslidably monnted.- Y

rality of mutually reinforcing material` cut.- ters inov'ably,engaged thereby.

10. A plairality of- (1Q-seeking rect-ing'tlie grouping of the'dies.

11.- A material freeing 'combination "of .dies ywith Wedge Walls 'directing theV unconinedmaterialfawayfromthe line of -thee01nb`in2-ztio1-1 and'oppositely directing" the In testimony Whereoflax signature in tliepresence 'of two' Witnesses. j HARRY ZIMMERMAN.. VVit-nessesz.v GEO. E. KIRK, l

. 'MARIE KLOPFER.

. e dies land- ,relatively m0vable'-1neans` foi'yleldably 'di-

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