US2762432A - Cutting machine for making lined wirebound boxes - Google Patents

Description

' Sept. 11, 1956 w HOGAN ET AL. 2,762,432

CUTTING MACHINE FOR MAKING LINED WIREBOUND BOXES 3 Sheets-Sheet 1 Filed May s, 1955 INVENTOR. fig'o an.

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II II Anlhony BY Sept. 11,1956 w. J. HOGAN ET AL CUTTING MACHINE FOR MAKING LINED WIREBOUND BOXES Filed May 8, 1953 5 Sheeis-Sheet 2 r e m .04! m x M w w m MHSIH IJM. A my mm 0% mm Y B Sept. 11, 1956 w, HOGAN ETAL CUTTING MACHINE FOR MAKING LINED WIREBOUND BOXES Filed May 8, 1953 5 Sheets-Sheet 3 INVENTOR.

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United States Patent Office 1, 2,762,432 Patented Sept. 11, 1956 N. 1., assignors to Stapling Machines Co., Rockaway, N. J., a corporation of Delaware Application May 8, 1953, Serial No. 353,884

3 Claims. (Cl. 164-38) This invention relates to machines for producing loop fasteners on the ends of the binding wires on wirebound boxes, including crates, and particularly to improvements in such machines which adapt them for the production of lined wirebound boxes of the type having protective or sealing flaps at their closing corners, as disclosed in the co-pending application Serial No. 291,708, filed June 4, 1952, now U. S. Patent No. 2,698,109, granted December 28, 1954.

The invention is shown herein as applied to a loop fastener machine of the type disclosed in U. S. Patent No. 2,161,200, issued June 6, 1939. Such machines are adapted to receive a succession of wirebound box blanks, each comprising a plurality of box sections or sides formed of side material or slats with reinforcing cleats stapled thereto along the lateral edges of the box blanks, with the several box sections foldably secured together by binding wires fastened thereto by staples driven astride the binding wires and through the side material and, in the case of the outside binding wires, into the reinforcing cleats. In such loop fastener machines, the binding wires are severed in the intervals between adjacent box blanks, prongs are formed in the resulting cut wire ends and the binding wires are bent to form loops therein and to place the prongs over the side material of the end sections of the box blanks and the prongs are driven through the side material and clinched over against the undersurface thereof to secure the loops. When the box blank is folded around to set up the box, the loops on the trailing end section of the box blank, which forms the front of the box, come into opposition with the loops on the leading end section, which forms the top of the box, and the former loops, being somewhat narrower than the latter, are inserted through the latter and bent down to secure the box closed.

In lined wirebound boxes of the type referred to in the aforementioned co-pending application, the box is lined with a cushioning material such as corrugated fiberboard, and the front section of the box is provided with a foldable flap of the lining material which extends from the upper edge of the front section in position to seal oif the closing corner of the box and protect its contents against pinching, bruising or other damage. To provide this foldable flap, the lining material is folded over for a short distance at one end of the box blank to form two layers, which, like the restof the lining material, are secured to the box blank by virtue of the fact that their lateral ends are sandwiched between the side material and the cleats, and by the staples and prongs which are clinched over against the outer layer. In order to facilitate handling of the box during shipment, etc., the outer layer is normally left flat against the inner layer until the box is set up, at which time it is pulled outwardly to form the foldable flap.

The present invention has for one of its objects the provision in the loop fastener machine of practical apparatus for mechanically perforating the ends of the outer layer of the lining material to facilitate separation of it from the inner layer to form the foldable flap. Another object of the present invention is to provide such an apparatus which is simple and inexpensive in construction and which is adapted for incorporation in existing loop fastener machines with minimum alteration of such machines. Other and further objects of the invention will be in part apparent and in part pointed out hereinafter.

In the drawings:

Figure l is a longitudinal sectional view of a loop fastener machine including perforating and slitting mechanism embodying certain features of the invention;

Figure 2 is a horizontal sectional view of the machin taken generally along the line 22 of Figure l;

Figure 3 is a fragmentary longitudinal sectional view of the machine, at enlarged scale, showing a portion of the trailing end of a crate blank being operated upon by the loop forming elements of the machine at an intermediate state of their operation;

Figure 4 is an end elevation of the portion of the machine shown in Figure 3, as viewed from the side corresponding to the right-hand side of that figure;

Figure 5 is a fragmentary longitudinal sectional view of the upper portion of the machine shown in Figure 3, illustrating the completion of the prong driving and liner perforating operations;

Figure 6 is a fragmentary transverse sectional view taken generally along the line 6-6 of Figure 5;

Figure 7 is a fragmentary isometric view of the underside of the trailing end of a wirebound crate blank showing the perforations and slits produced by the apparatus of Figures l-6;

Figure 8 is an enlarged fragmentary plan view of one of the corners at the trailing end of the crate blank showing the perforations and slits more clearly; and,

Figure 9 is a perspective view of a wirebound crate, assembled and fully packed, illustrating the protective flap at the closing corner of the crate.

In Figures 1 and 2, a continuous succession of wirebound crate blanks B, secured together by binding wires W is shown supported in a loop fastener machine on the vertically movable table T. The crate blanks are fed intermittently through the machine in the direction indicated by the arrows A by means of conveyor belts (not shown) frictionally engaging the lateral edges of the crate blanks. The succession of crate blanks is moved forward by incremental distances equal to the spacing of the crate blanks, with the forward movement of the succession of crate blanks being briefly interrupted each time it reaches the position shown in Figures 1 and 2 at which the binding wires W in one of the intervals between adjacent crate blanks B are centered between the upper forming dies F and the lower forming blocks F. Thereupon, the table T is lowered to place the binding wires W upon the lower forming blocks F and the forming dies F are driven downwardly to cause the wires to be severed and to form prongs in the resulting cut wire ends. Then the upper forming dies F are retracted and the spindles S are raised to engage the binding wires and rotated to bend the end portions of the binding wires to form loops therein and to place the prongs over the slats at the ends of the adjacent sections G and H of the crate blanks. Then the drivers D are driven downwardly to drive the prongs through the slats where they are clinched over by the clinchers C to secure the loops. The drivers then are retracted and the movement of the succession of box blanks is resumed.

Figure 3 shows a typical loop fastener unit, which operates upon one of the outside binding wires on the trailing end section G of each crate blank. As may be seen in that figure, the-crate blank includes slats I with reinforcing cleats K stapled thereto adjacent the lateral edges of the crate blank by staples M driven astride the binding wires W, through the slats J and into the cleats K. Each crate blank is also provided with lining material L at the inner faces of the slats J, the piece of lining material under the outer. slat on the trailing crate section G being doubledover along theouter edgeyof the slat to proyidetwo layers.

I andO. The. outer layer. O is somewhatwider than the inner layer I so that it. projects beyondthe inner edge of the outer slat gist-indicated at ltl to facilitate grasping.

ofthe outer layer for formation of the-.foldableflap.

:InFigureB the. loopwform-ing elements of. the machine are shown at an intermediate stage of their operation, in which the driver Dhas driven the prongP fully into the slat I so that it projects through. theslat-and the two to move downwardly slightly to theposition shown in- Figure 5 atwhich-the prongsP engage the. clincher anvils .6; nd. r in hed v r a nst th Hde s faC Q ou e ay r of he lin ng m t riab a t lus ted To accomplish the perforating and slitting operations according to the present invention, a cutting knife. 18 is secured to the'outerface of each of the two clincher as semblies C for the outside binding wires. on he trailing sections G. The upper edge of the cutting knife 18, which is serrated'to provide teeth 18a, extends longitudinally of the loop fastener machine near the inner face of the outside cleat K, as shown in Figure 4. The cutting knife 18 is securedto theclincher C by means of bolts 20 passing through openings 21' in the clincher C which are elongated to permit adjustment of the vertical position ofthe cuttingknife, The cutting knife is normally positioned so that the. points of the teeth 18a are at ap- PIQXimately the same level as the upper face of the clincher plate 12.

Adjacent the left-hand end of the cuttingknife 18, as.

viewed in'Figures 3 and 5, and positioned for cooperative cutting action therewith, a smaller cutting knife 22 is provided. The knife'22 is secured to and projects downwardly from the head 24a of a bolt 24 which extends upwardly between a pair of angle members 26 and is adjustably secured thereto by locknuts 28. The. angle members 26 project rearwardly from a bracket 30 secured to the driver D. The upper knife 22 is slightly narrower than the spacing between the adjacent slats of the crate blank and is positioned in alignment with the space between the outer slat on the trailing section G and the slat next thereto.

As the crate blank is driven downwardly by the driver Dior clinchingof the prong P, as shown in Figure 5, the teeth 18a of the cutting knife 18 are caused to pierce the outer layer 0 of the lining material and form therein a row of perforations 32, as shown in Figures 7 and 8. The upper knife 22, which is driven downwardly with the driver D, passes through the space between the end slat and the adjacent slat and, in-cooperative cutting relation, past the teeth 18a of the lower cutting knife 18', as shown in Figures and 6. As shown in Figures 7 and 8, this results informing a slit 34 extending from the end of each of the rows of perforations 32 across the projecting portion of the outer layer 0. These slits 34 facilitate tearing of the outer layer 0 along the rows of'perforations 32.

After the prongs havetbeen fully driven,

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To support the projecting portion 10 of the outer layer 0 and prevent its being bent or torn during the slitting operation, an arm 36 (Figures 3, 5 and 6) is adjustably positioned on the table T so as to extend under the projecting portion 10.

When the crate blank is-set up, as shown in Figure 9, the projecting portion 10 of the outer layer 0 may be easily grasped and pulled outwardly to tean the outer layer along the rows of perforations 32 and adjacent each of the clinched-over prongs P and. staples M to free the outer layer and form a foldable sa 38 as: indicated in broken lines in Figure 7. 'This; foldablje flap 38 projects from the upper edge of the front of the assembled crate, as shown in Figure 9 in position'to seal the closing corner of the crate and-protect its contents.

From the foregoing description, it will be understood that there has been provided an extremely simple and inexpensive apparatus, readily adapted for inclusion in existing loop fastener machines, which results in p,erfora-. tion of the outer layer of the liningmaterial along oneend of a box or crate blank to, facilitate, formation of a foldable flap. It will therefore be appreciated that the aforementioned. and other desirable, objects have. been achieved. However, it should be emphasized that the particular embodiment of the invention which is shown and described herein is intended as merely illustrative and which they are bent. to. form loop fasteners, a: pair of cuttingknives-secured in said machine with their cutting edges extending adjacent the paths of the inner faces of said cleats at such height that at the extremity. of such.

lateral movement of. said container blanks, said cutting edges will come into cutting engagement with the outer layer of a lining material-lying againstthe undersurface of said side material and doubled over along said end of said container blank to cut said outer layer along two lines adjacent the inner faces of said cleats whereby said outer layer may subsequently be pulled away from the inner layer of said lining material: to. form a flap for sealing the closing corner of the container formed from said blank.

2. The invention claimed. in. claim 1 wherein said cuttings edges are serrated.

3. The invention as claimed in claim 1 wherein said cutting edges are positioned at such height as tov cut; only through the outer layer of said lining material.

R ferences Ci ed in the fileof this. P t nt U D STATES PATENTS- 426,685 Saflord Apr. 29,- 1890 833,470 Lipowsky Oct. 16, 1906 846,362 Swift Mar. 5, 1907 1,487,130 Witherell Mar. 18, 1924 1,660,854 Armstrong Feb. 28, 1928 1,933,031 Rosenmund Oct; 31, 1933 2,140,169 Rosenmnnd Dec. 13; 1938 2,161,200 Rosenmund June 6, 1939- 2,228,304 Florcyk Jan. 14, 1941 2,244,049 Capps June 3, 1941

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