US2470727A - Anvil clinching stapling machine - Google Patents

Description

4 Sheets-Sheet 1 may 1.7, T949 w. scHAl-'ROTH ANVIL CLINCHING STAPLING' MACHINE Filed NOV. 30, 1945 INVENTOR: Mfr/vif? 5mn/war# HKU L ms ATTORNEY File Nov; 50, 1945 4 Sheets-Sheet 2 INVENTOR Wsw/5R 5cl/Rara HIS ATTORNEY May 17, 1949.. w. scAFRo'l-H ANVIL CLINCHING STAPLI-NG. MACHINE 4 snee'tsfsheet :5

Filed Nov. 30, 1945 has INVENTOR; Wimvf 5am-Rar# I #am rHS ATTORN EY May 17, 1949. w. scHAFRTl-'r' ANVIL lCLINoHINGf STAPLING MACHINE 4 Sheets-Sheetr 4 Filed NOV. 30,' 1945 INVENTOR: MmMJr/war# HIS ATTORNEY Patented May 17, 1949 ANVIL CLINCHING STAPLING MACHINE Werner Schafrotli, Brookline, Pa., assigner to International Staple and Machine Company,

Clifton Heights, Pa., a corporation of Pennsylvania Application November 30, 1945, Serial No. 631,965

5 Claims.

This invention relates to stapling machines and particularly to stapling machines used to secure the aps or ends of closed cartons or containers Where the staple is driven into the carton and then means is inserted for clinching the ends thereof.

The invention is an improvement over similar machines of my prior patents, No. 2,080,634, dated May 18, 1937, and No. 2,234,808, dated March 4, 1941, in that the piercing anvils are directly actuated by positive links and levers instead of cams or other means, and the operation of the anvils is delayed until the staples are in place.

The stapling machine of the type with which this invention is concerned includes as characteristic elements a plunger for driving the staples in place, and a pair of penetrating semi-circular anvils actuated by suitable operating instrumentalities, including levers connected directly to the anvils and influenced by cam tracks in a sliding plunger to rotatively operate the anvils to pierce the material being stapled and clinch the ends oi the staples against the inner surfaces of the materials being stapled,

The purpose of this invention is to provide mechanical means for driving staples through naps or ends of closed cartons and actuate staple clinching anvils to pierce the material, clinch the inner ends of the staples and then Withdraw the anvils leaving the staples in place.

The machines of my prior patents above noted first actuate the anvils to positions directly below the ends of the staples and as the staples are driven inward the curvature of the anvils causes the ends of the .staples to assume clinching positions, and after this operation is completed the anvils are Withdrawn.

Owing to peculiar conditions in some cartons and other objects or devices, it is necessary to first drive the staple into place and then actuate the anvils to bend the ends of the staple to clinching positions and then Withdraw the anvils.

Due to the complex nature of the movement which is imparted to the penetrating anvils during their piercing and clinching operations, it is necessary to provide links and levers directly connected to the anvils and actuated by rollers in cam grooves in a plunger. In View of the fact that the staple is first driven by the same instrumentalites, the movement of the penetrating anvils must necessarily be delayed until the staple actuating devices have driven the staple into place. The staple operating mechanism must then be stopped and held so that the staple is firmly gripped and forced against the material, although the movement of the staple operating mechanism must remain still While the same actuating mechanism operates the anvils through the piercing and clinching operation.

This combination of operations causes excessive Wear on cam tracks or grooves yclosely associated with the staple driving means or the anvil operating ldevices and, therefore, these devices must be actuated by cams operating through levers and links with the levers and links directly associated With the staple driving device and anvils.

Driving and .holding the staples before actuating the anvils also makes it necessary to separate the instrumentalitiesthrough which the two devices are operated at points closely associated with the said devices and at the same time operate both through a common plunger.

The object of this invention is therefore to provide an improved `stapling machine for closed cartons, containers and the like, which rst drives a staple through flaps or ends of the cartons with the ends of the staples piercing the said aps or ends and extending considerably inward and then introduce clinching means that pierces the parts being stapled and engages the ends of the staples, and then forces them against the inner surfaces of the layers of material being stapled providing clinching means.

More in detail this invention has in view as a further objective, the provision of a stapling machine of the type noted which includes a movable guide plunger with a lever forcing the plunger downward together with associated operating instrumentalities that cause the plunger to be moved into position, whereby levers pivotally mounted on the casing and connected to staple driving means and anvils by links, are actuated by cams on the levers extending into cam tracks in the plunger to force the staples through the material being stapled and the piercing anvils also through the material to clinch the ends of the staples.

Associated with this phase of the 4stapling machine is an extremely important objective which aims at the provision of a machine in Which the operations of the penetrating anvils, staple guide plate Aand staple driving mechanism are accurately and positively;A4 .synchronized so as to insure `of proper operation of the machine.

Yet another object is associated with this phase of the invention and deals with the provisie-n of novel and improved driving connections between the staple driving means 'and the pentrating 3 anvils and the operating instrumentalities 'therefor.

In order to meet present day conditions prevailing in the manufacture of cardboard cartons, and other similar packages which are intended to be closed by the stapling machine oi this invention, and particularly in view of the toughness of the materials which must be pierced in order to carry out the stapling operations, it necessary that the operating instrumentalities of the machine be effective to drive the staple driving mechanism and the penetrating anvils with extremely high velocity.

The creation of these high velocities gives rise to the setting up of a large number of sharp shocks and jars, which, if taken up by the machine alone, greatly reduces the service life thereof.

Accordingly the invention has in View, as a highly important objective, the provision of an arrangement in which the material being operated upon (such as the flaps of a corrugated cardboard carton) takes up a large portion or the shocks and jars which are an inevitable incident to the operation of the machine.

Yet another highly. important object of the invention is the provision of a novel and improved casing structure that is designed to house the various means, mechanisms and instrumentalities making up the machine of this invention.

More in detail the invention has in View the provision of a casing structure which serves to operatively mount various parts of the mechanisms included therein. The casing structure must be readily assembled and dissembled as occasion demands, and an important phase of the invention is the novel constructional features imparting these properties thereto. 'It is important that the casing structure be so designed that the machine may be readily manipulated and handled under conditions o practical usage.

Various other more detailed objects and advantages such as arise in connection with the building, design and operation of a stapling machine in accordance with the above noted objectives will in part become apparent, and in part be hereinafter stated, as the description of the invention proceeds.

The use or relatively tough materials, such as heavy cardboard, plastics, and materials formed of other compositions, present problems in connection with the usual stapling machines and therefore machines of this improved design and operation, and particularly in which the staples are rst driven into place and the ends then clinched against the materials, have been found necessary.

The invention therefore comprises a stapling machine including staple driving mechanism, a pair of penetrating anvils pivotally mounted adjacent the end of the machine and adapted to be actuated beyond the said end of the machine, links rigidly attached to the anvils, levers pivotally attached to the links and to the machine, other levers pivotally mounted in the machine and positioned to operate the staple driving means, a common plunger slidably mounted in the machine and having cam tracks therein for operating both the staple driving, and anvil operating levers through rollers from the said levers extending into the said tracks, and a handle through which the plunger may be operated to rst actuate the staple driving means with the anvil operating means remaining stationary and, after the staple driving means has been actuated to its eXtreme movement, the anvil operating means is operated to clinch the ends of the staple with the staple driving means remaining stationary.

For a full and more complete understanding reference may be had to the following descrip tion and accompanying drawings wherein:

Figure l is a view showing a side elevation of the stapling machine with the head or vertical section thereof shown in section.

Figure 2 is a view showing a front elevation of the machine with the front removed.

Figure 3 is a sectional plan showing the mounting of the anvils.

Figure 4l is a detail showing one of the anvils.

Figure 5 is a sectional view through the rear portion of the machine on line 5 5 of Figure 1 and with the handle omitted.

Figure 6 is a vertical section through the machine with the thickness of the machine illustrated on an enlarged scale.

Figure 7 is a View similar to that shown in Figure 5 with the interior of the casing indicated by dash lines and with the plunger moved downward through the movement in which the staple driving plunger is actuated and in which the anvil operating means remains stationary.

Figure 8 a similar view showing the plunger moved to its extreme position during the movement in which the anvils are operated.

Figure 9 is a cross section through the upper portion or the machine, taken on line 9 9 of Figure 2, illustrating the relative positions of the parts.

Referring now to the drawings wherein like reference characters denote corresponding parts, numeral lll indicates a sliding cam block, numeral i l a casing and numeral l2 a handle by which the stapling machine is manually operated.

The block lil is vertical slidable in grooves I3 and ld in the casing l l, and the upper end is provided with ears l5 and i6 between which a bar ll of the handle i2 is pivotally mounted on a pin i8. The block l@ actuates, rst a plunger l@ which drives a staple, and then as its sliding movement continues, operates anvils or clinching ngers 2@ and El, which bend under and clinch the ends of the staple as illustrated in Figure 8.

The plunger E9 is also slidable in the casing l E and this is mounted in a slot 22 at the center of the rear of the casing and is positioned to pick up a staple 23 from a strip 2li extending through an opening 25 and held inward by a follower 25 on a bar 2l'. The bar and follower are incorporated in a leg 28 extending at the rear of the machine and the follower is resiliently held by a spring 29. It will be understood, however, that staples may be fed to the machine by any means or in any manner.

The plunger i9 is operated by levers 3o and 3i as illustrated in Figures 5, 7 and 8, and these levers are pivotally mounted in the casing on pins 32 and 33. The opposite ends of the levers are formed with slots 3d and 35 into which a pin 36 on the plunger I9 extends as illustrated in Figure 6. Rollers 37 and 38 are also mounted on the levers 3G and 3| respectively and 'these rollers extend into cam slots 39 and ill! in the rear of the block Ill, and it will be noted that as the block is actuated by the handle I2 so that it will slide downward the rollers 3l and 38 will be forced downward until they arrive at their respective positions shown in Figure 7, and during this movement the levers 3E) and 3l will move downward from their position shown in Figure 5 to their positions in Figure '7, This downward movement of the levers 3o and 3l moves the pin 36 on the plunger IQ and also the plunger downward from the position shown in Figure 5 to that shown in Figures '7 and 8, and during this movement of the plunger the staple is forced downward and driven through the layers oi material to be stapled and against which the chine is held. This rst step of the downward movement of the block Eil therefore drives the staple downward and through the material whereas the anvils remain stationary and do not begin to move until the staple is in place.

The anvils 2K3 and El are rotatably mounted in the lower part of the machine and positioned so that as they are rotated they will `extend beyond the end of the machine and pierce the material against which the machine is placed. The anvils are formed as illustrated in Figure Il with piercing points lil at the end of semi-circular sections 42, and these are integral with hubs t3 on shafts 44. One anvil only is illustrated in Figure i and this is indicated by the numeral 2d, and it will be understood that the other anvil 2l is similar although opposite hand. The anvil 2l is provided with a shaft l5 and on the opposite ends of the shafts are arms iii and lil, which are connected by links als and lis to arms 5o and 5i. The arms 5@ and 5l are pivotally mounted on a stationary pin 52 in the front of the casing and connected at their opposite ends to the links s3 and dit by pins 53 and 5d on which rollers 5h and Sii are rotatably mounted. The opposite ends of the links i8 and lil are pivotally connected to the arms it and di by pins 5l and 53.

The rollers 55 and 5'0" extend into cam slots 59 and Eil in the block iii, and it will be noted that as the biock moves downward from the position shown in Figure 5 to that shown in Figure '7 the vertical sections of the slots 5S and 6l) pass downward over the rollers, thereby holding the anvil operating mechanism stationary. This movement as hereinbefore described operates the plunger lil to drive the staple, the anvils remaining stationary. At this point the staple is in its eXtreme position as shown in Figure 'l and then as the block Iii continues to move downward from the position illustrated in Figure 'Z to that illustrated in Figure 8, the rollers 55 and 5t follow the horizontal portions of the slots si? and to, moving inward to their respective positions shown in Figure 8, and during this movement draw the ends of the levers 5i! and 5l and the links d8 and 49 inward to their positions shown in dotted lines, and this movement actuates the anvils through their respective arms d6 and dl, the arms assuming horizontal positions and the anvils te and Zi piercing the material, or layers of material, and at the same time engaging the extending ends of the staples and bending them inward and against the inner surfaces of the materials, as illustrated in Figure 3.

During this movement of the block iii, the rollers 3l and 33 of the levers Sil and 3i remain stationary, being held in this position by the vertical sections oi the cam slots 39 and to, thereby holding the staple in the driven position during the operation of the clinching anvils.

The operation is now completed, and the handle may be drawn upward to the original position, and during this movement the block iii is drawn upward and this aotuates the anvils to return to their original positions and also withdraws the staple driving plunger is to its original position.

The casing l! may be formed as shown in the drawings with a cover plate 6l and an inten mediate partition 62' in which the anvils are rotatably mounted as shown in Figure 3. The partition may be frictionally held in the lower portions of the slots I3 and i4 as illustrated or held in any manner. At the upper end of the casing are extending ears t3 between which the end of the handle bar I 'l is pivotally mounted through a link Sii and pins 65 and t. rThe upper end of the casing may also be provided with slots 61 and B3 to receive the bar il as the handle moves downward.

The lconstruction of the stapling machine should be readily understood from the foregoing description.

In use the machine may be provided as shown and described and with staples extending through the slot 25, the handle l2 may be drawn downward, and as the handle is drawn downward it forces the sliding block I!) downward in the casing. The block rst actuates the plunger I9 to drive the staple with the anvils remaining stationary and then holds the staple driving means stationary as it forces the anvils through the material and against the extending ends of the staple to clinch the said ends against the inner surface of the material being stapled. The handle is then drawn upward and the operation of the stapling machine is complete.

While a preferred specic embodiment of the invention is hereinbefore set forth, it is to be clearly understood that the invention is not to be limited to the exact construction illustrated and described because various modifications of these details may be provided in putting the invention into practice within the purview of the appended claims.

What is claimed is:

l. In a stapling machine, a frame, a sliding block movably mounted on the frame, a handle by which said block may be operated, a staple driving plunger arranged on the frame and operatively connected to and movable by said block, staple clinching anvils arranged on the frame and operatively connected to and movable by said block, cam means on said block and inuencing said plunger, and other cam means on the block inuencing the anvils, said last-mentioned cam means being arranged below the first-mentioned cam means and operable subsequently thereto.

2. In a stapling machine, a sliding block, said block having cam tracks therein, a handle by which said block may be moved, a staple driving plunger operatively connected to said block and having its movement influenced by the said cam tracks, other cam tracks in said block, and staple clinching anvils operatively connected to the block and having their movement influenced by said other cam tracks in the block.

3. In a staple machine, a frame, a member slidably mounted on said frame, said member having cam tracks therein, a staple driving plunger, means connecting the plunger to the cam tracks, staple clinching anvils, other cam tracks in the said member, and a plurality of instrumentalities operably connecting the anvils to the last-mentioned cam tracks.

4. In a stapling machine of the kind described, in combination, a frame, a member slidably mounted in said frame, a plunger hingedly connected to said member, a plurality of links mechanically connected to said plunger, a pair of anvils, a second plurality of links operably connecting the anvils and member, and cam means arranged on the member and connected to the said links, said cam means being effective to influence the movements of the plunger and the anvils in sequential order.

5. In a stapling machine of the kind described, in combination, a member slidably mounted in said frame, manually operable means connected to the frame and effective to reciprocate the member, cam tracks arranged in an upper portion of the member, a staple driving plunger, means operably connecting the cam tracks and the plunger, a pair of staple clinching anvils, other cam tracks arranged in a lower portion of the member, and other means operably joining the anvils and said last-mentioned cam tracks.

WERNER SCHAFROTH.

REFERENCES CITED The following references are of record in the le of this patent:

Number UNITED STATES PATENTS Name Date Brown Jan. 8, 1895 Reinhold Apr. 13, 1897 Matveyei Mar. 1'7, 1931 Vogel Dec. 15, 1931 Matveyei Sept. 20, 1932 Palzer July 17, 1934 Taylor Aug. 20, 1935 Vogel Mar. 10, 1936 Fodor May 12, 1936 Matveyei Sept. 15, 1936 Schafroth May 18, 1937 Matveyei Dec. 5, 1939 Pankonin Mar. 24, 1942 La Place Jan. 19, 1943

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