Патент USA US2025708код для вставки
Dec. 31, 1935. 2,025,708 H. _K. BAKER METAL STRUCTURE Filed Sept. 12, 1931 2 Sheets-Sheet 1 @ W ' INVENTOR fz’ eriart/f?a A’ar MMTWMMMMTQ BY I ATTO RN EY's Dec. 31, 1935. H, K_ BAKER 2,025,708 METAL STRUCTURE Filed Sept. 12, 1951 T ‘E. ' _ 2 She'ets-Sheet 2 _ INVENTOR I wpdmi/Atm ml?daamwi ' ATTO RN EYS Patented Dec. 31, 1935 2,025,708 UNITED STATES PATENT- OFFICE 2,025,708 IMETAL STRUCTURE Herbert K. Baker, Detroit, Mich. Application September 12, 1931, Serial No. 562,580 10 Claims. (Cl. 72-117) This invention relates to improvements in ex panded metal structures and methods. in making same. The particular object of my invention is to provide an expanded metal fabric light in weight per unit of area, possessing greater rigidity than heretofore provided in expanded metal fabrics of the kind depending entirely upon their strand structure for sti?ness of the ?nished sheet. On account of economy in weight, this type of ex panded metal is used extensively as a plaster base. Present fabrics of this kind when made andv used as metal lathing lack rigidity and re quire closer spacing of the supporting members to which the fabric is attached, than otherwise tained in the ?nished fabric as will be readily understood in accompanying drawings and fol-_ lowing speci?cations. Figure 1 is a face view of a fragment of a fabric embodying the improvements of my invention; Figure 2 is a view of a fragment of a previously 01 slitted blank showing the arrangement of the slits and strand interconnecting bonds, from which the fabric in Figure 1 is expanded; Figure 3 is a face view of a fragment of an- 10 other fabric embodying my invention with modi? cations over the fabric shown in Figure 1; Figure 4 is a view of a fragment of- a previously slitted blank showing the arrangement of the slits and strand interconnecting bonds, from 15 which the fabric shown in Figure 3 is expanded, would be necessary. The expanded metal structure embodying my invention is adaptable to the same procedure‘ including the modi?cations shown in Figure 4a. Figure 4a. is a View of a fragment of a previin manufacturing with modi?cations, as the type 20 of fabric formed by operating upon a previously ously slitted blank with slightly modi?ed ar of the bonds over the blank in Fig slitted sheet, to bend or de?ect the strands to rangement ure 4; produce the open diamond mesh, the bent strands Figure 5 is a view of a portion of a previously extending diagonally of the sheet in opposite di— slitted blank ' being progressively expanded, rections and being connected at their intersec starting at a point well within from the outside tions by bonds or bridges disposed in rows ex tending transversely of the sheet. As is well longitudinal edges of the slitted blank and ex progressively outward in opposite di known in the art, these bonds or bridges by rea , panding verging lines to the longitudinal edges of the son of their double or greater width than the strands when disposed substantially edgewise to the sheet, imparts the stiffening factor to the fab ric. Spacing these bonds closer together in creases the rigidity of the sheet. To space these bonds closer together in the present expanded metal fabric mentioned above, requires the open ings to be further reduced in size, therefore in creasing the number of strands, area and weight of the blank as well as unit weight of the ?nished sheet, or further decrease the width of the strands to the extent of impracticability in main taining economy of weight in the ?nished sheet. In my improved expanded metal structure, the bonds and strands are arranged so that strand interconnecting bonds are not only spaced closer together across the sheet but are aligned in sub stantially edgewise relation to the plane of the sheet in such a manner to distribute any strains (causing ?exing when handling or sagging when being plastered on) over a greater area of mesh structure, thereby resisting such strains more satisfactorily than the present expanded metal fabrics of this type. Although the arrangement of strands and bonds in the expanded metal fabrics embodying my invention permits closer spacing of the bonds across the sheet, economy in weight is main slitted blank, producing the expanded metal structure embodying my invention; > ' ' Figure 6 is a view of a portion of the slitted blank being progressively expanded by starting from one outside longitudinaledge expanding progressively in a diagonal line to the opposite longitudinal edge of the slitted blank, producing the expanded metal structure embodying my in: vention; ' '1 Figure 7 is a diagonal cross section on line 1-1 of Figure 1, and Figure 8 is a similar section on line'8—8‘of Figure l. 40_ The arrows in Figures 5 and 6 indicate the di rection of the movement of the slitted blank as the said blanks are being progressively expanded. To produce the expanded metal structure as embodied in my invention, slits uniform in length 45 are formed in the blank by an arrangement to position the strand interconnecting bonds B (see Fig. 2) so that any one bond is spaced an unequal distance apartvbetween any pair of bonds in the adjacent row of longitudinally alined bonds there by producing the alternate relatively short and long strands A and C respectively (see Fig. 2). The blank with the slits so formed is expanded or opened into a mesh-work structure so that said bonds are substantially alined with the relatively 55 2 _ 2,025,708 shorter strands A extending diagonally of the‘ sheet, the relatively longer strands C being in somewhat staggered relation inclined in the op posite direction diagonally of the sheet (see tend the full distance between pairs of parallel strands Al extending in the opposite diagonal Fig. 1). 3 and 4a). ' ' The expanded metal structure embodying this invention is further modi?ed (see Fig. 3) by form ing slits in the blank in an arrangement whereby the strand interconnecting bond Bl (see Figs. 4 10. and 4a) are either lengthened or positioned so that the bonds in any row of bonds extending lengthwise of the slitted blank join, abut or par tially overlap the bonds in the adjacent row of longitudinally alined bonds. The blank with the 15 slits and the bonds so arranged is expanded into meshwork~ whereby bonds Bl extend in lines diagonally of the sheet and the strands AI in; cline away from said bonds in the opposite direc tion diagonally of the sheet. ‘In this arrange 20 ment of slits and bonds (see Figs. 4 and 4a) said bonds Bl may also be regarded as strands of double or greater width than strands Al. Referring to Fig. 4a, the bonds Bl in rows ex tending lengthwise of the slitted blank are ar 25 ranged to overlap said bonds in the adjacent rows, for the length of said overlap at B2 the combined width of bonds is three times the width _ of strands AI. In this arrangement the bonds Bl may also be regarded as strands being of double or greater width than strands Al, the‘ overlap of said bonds B2 then becomes a bond connecting strands'Al and BI. _ As will be noted in Figures 1 and 3 the bonds and strands in the ?nished sheet are disposed edgewise and substantially perpendicularly to the 35 ' plane of the sheet. In this invention the close coupling of the ‘ bonds in a series of bonds and their alignment in edgewise relation extending diagonally of the 40 sheet, materially increases the e?‘lciency of the bonds in imparting rigidity to the meshwork struc ture, as a greater-number of bonds cooperatively act to distribute the bending stresses when .the sheet is under load to a greater area of meshwork 45 'structure than in present forms of expanded metal fabrics mentioned herein. As the bonds in these structures are generally of independent alignment and coupled in offset relation with the ' strands extending diagonally of the sheetrin op-, 50 posite directions which tends to restrict the bonds ‘ in cooperatively acting to distribute the bending stresses as the bonds are offset from alignment with the strands carrying the stresses. - In my improved meshwork structure formed 55 of relatively long and short strands being con nected by bonds, the said combined bonds and short strands extending in‘lines diagonally of the sheet form borders for two sides of the open ings D (see Fig. l) and the longer strands ex 60 tending in the opposite diagonal direction form ing the remaining borders of said openings. This arrangement permits the closer coupling of the bonds without further materially decreasing the area of the meshwork openings or the width of 65 strands found in the present forms of this type of expanded metal fabrics of the same weight be ing accepted by the trade. Thereby rigidity is in creased and economy of weight is maintained‘ in my improved expanded metal structure. The rigidity may further be increased by the 70 ‘modi?cations (see Figs. 3, 4, and 4a) by extend ing the length of the bonds in the slitted blank, when expanded into meshwork the bonds Bl (see Fig. 3) are formed in lines in edgewise relation 75 extending diagonally of the sheet, said bonds ex direction. These bonds'may be arranged to even overlap, this overlap is identi?ed by B2 (see Figs. ' 5 The expanded metal fabrics as. embodied in my invention' may be slitted and expanded from blanks ‘by any suitable means (not shown). Methods of expanding a previously slitted blank (see Fig. 2) is shown in Figures 5 and 6, the slit- 10 ted blanks as shown in Figures 4 and 4a may also be expanded in the same manner. Although certain comparisons are made herein as to sizes of openings and width of strands with present forms of expanded metal fabrics of this 15 type, it is understood however, the size of open ings may be altered with corresponding changes in the size of the bonds and strands to ful?ll the needs of the trade without departing from my invention. _ — ' 20 Although in describing my invention as an ex panded metal fabric, light in weight, of increased rigidity over similar types of fabric 'used for metal lathing, it may also be employed in the making of fabrics for reinforcing concrete, screening, etc. 25 As clearly shown in Figures 1, 3, 5, and .6 the angle of divergence between the short or bonded strands and the longitudinal axis of the sheet is limited to approximately 30°. This produces the important effect of greatly increasing the longi- 30 tudinal rigidity of the expanded sheet, as the short strands which include the bonds extend in continuity through a considerable portion of the length of the sheet. As a consequence it is not necessary to produce any ribs or other reinforcee 35 ment longitudinally of the sheet as rigidity is obtained by the same construction of meshnwork throughout the length and breadth of the sheet. What I claim as my invention is: _ 1. An expanded» metal fabric comprising a 40 meshwork of strands and bonds, a bond through out its length being of a width of a plurality of strands andysaid meshwork including a series of said bonds in continuity and substantially in edgewise relation'to the plane of the sheet and 15 strands extending transversely from said bonds. 2. An expanded metal fabric comprising a meshwork of strands and bonds including plu- ' ralities of bonds arranged to form continuities of relatively wide strands extending diagonally of 50 the sheet and relatively narrow strands extended transversely from said wide strands. 3. An expanded metal fabric comprising a mesh work of strands and unslitted strips, saidv unslitted strips extending continuously diago- 55 nally of the expanded sheet and parallel to each other and strands extending transversely between said unslitted strips. . 4. An expanded metal fabric comprising a mesh work of strands and unslitted strips, said 60 unslitted strips being in substantially edgewise relation to the plane of the sheet and extending. diagonally thereof and strands inclining away from and extending between said unslitted strips. , _5. An expanded ‘metal fabric comprising a 65 meshwork of strands and bonds the strands being ' of substantially equal width, a bond throughout its length being of a width which is an even mul tiple of strand widths and a series of said bonds extending in uninterrupted continuity with 70 strands extending transversely from said bonds. 6. An expanded metal fabric comprising a_ meshwork of strands and bonds including a series of bonds arranged to form an uninterrupted con tinuity of relatively wide strands extending diag- 75 ' 2,025,708 onally of the sheet between rows of relatively 9. An expanded metal open mesh fabric such narrow strands inclining in one direction away as can be formed from, a blank slitted parallel from said wide strands on each side thereof and to the side edges thereof to form a series 0! strands, and bonds‘ between adjacent strands continuous with each other, said bonds and strands in the expanded sheet extending diago nally thereof, the bonds forming a continuous bar of a width equal to a multiple of strands. 10._ An expanded metal open mesh fabric such as can be formed from a blank slitted longitudi nally thereof to form parallel strands, leaving un to the plane of the sheet. - ‘ .. _'I. An expanded open mesh metal fabric formed from a slitted blank with bonds between strands on opposite sides of the slits continuous with each ‘other the entire width of the sheet, said bonds forming two sides of each open mesh and said 10 strands forming the other two sides. 8. An expanded metal open mesh fabric such as can be formed from a sheet slitted parallel to the side edges thereof to form a series of strands, and bonds between strands continuous with each. 15 other, said bonds and strands in the expanded sheet extending diagonally thereof and trans versely to each other. slitted strips extending diagonally of the blank and the direction of the slits, 'said strands and unslitted strips in the expanded sheet extending diagonally thereof and transversely to each other. ' HERBERT K. BAKER.