US2170646A

US2170646A - Perforating machine

Info

Publication number: US2170646A
Authority: US
Inventors: Stig E Rosenberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-04-13
Filing date: 1938-04-13
Publication date: 1939-08-22
Anticipated expiration: 1956-08-22

Description

g- 1939. s. E. ROSENBERG PERFORATING MACHINE Filed April 15, 1938 a 3 Sheets-Sheet 1 Tfi/ l2 ,27

Aug; .22, 1939- s. E. ROSENBERG 2,170,646

I PERFORATING MACHINE Filed April 13, 1938 3 Sheets-Sheet 2 S. E. ROSENBERG PERFORATING MACHINE Aug. 22, 1939.

Filed April 13, 1938 T w if Q/JT' 3 Sheets-Sheet 3 0 39 di ii Patented A ug. 1939 Q UNITED STATES PATENT OFFICE PERFORATING MACHINE Stig E. Rosenberg, Brockton, Mass.

Application April 13, 1938, Serial No. 201,699

machines which are used in many industries and which have a wide use in the manufacture of shoes to ornament various forms of shoe uppers and parts thereof.

It is common practice to provide these perforating machines with a perforating die and a die striking plate between which the work is penetrated and pierced by the cutting edges of the die. In order to disclose and define the present invention, a distinction has been made between the action of the cutting edges in passing into the work and the action of the cutting edges in passing through the work. As a result of the first action the workis penetrated. As a result of the second action the work is pierced. The die particularly in the shoe industry, comprises one of a series of dies, the cutting edges of each of which are differently arranged to ornament the work pieces with different designs. In the early days, the cutting edges of each die used in the machine struck and bit into the striking plate. thus rendering it unfit for further use with any die other than the one that impressed the design of its cutting edges thereinto, the repeated use of which die soon ruined the striking plate, thus requiring its replacement. Attempts have been made to prolong the life of the striking plate by providing it with a striking surface sometimes softer and sometimes harder than the cutting edges of the die, with the result that the striking plate required earlier replacement in the first case and reduced the operating life of the cutting edges of the die in the second.

As the size of the dies and the number of cutting edges therein increased, it was proposed to face the striking plate with a sheet of paper into which the cutting edges 'of the die penetrated. While this paper prolonged the life of the striking plate and permitted it to be used with any die in the interchangeable series, it was necessary to provide the perforating machine with a paper supply roll, a paper rewind roll, and a paper feed for moving the sheet of paper over the striking plate after each cycle of cutting operation in order to produce a fresh paper surface into which mechanism, under the striking plate to the rewind roll. The paper feed mechanism used in a perforating machine has become complicated in the desire of the manufacturer to obtain accuracy and uniformity in the length of the-paper feed and in the adjustment of that length, presenting problems annoying both to the manufacturer and user with respect to operation,.maintenance and repair. One problem, particularlyannoying both to the die and to the shoe manufacturers, resulting from the use of paper in a perforating machine, is due to the pressure adjustment therefor which is provided to enable the operative to vary the stroke of the plunger which operates the striking plate in order that the cutting edges of each of the dies in the interchangeable series may penetrate, but not pierce, the paper backing for the striking plate. This adjustment involves considerable judgment upon the part of the operative in order to produce good work and to avoid injury to thedies, the striking plate or the machine.

The principal objects of the present invention are to produce a perforating machine in which no paper is used, in which no pressure adjustment is provided, and in which the striking plate may be used with all the dies in the interchangeable series without injury to the cutting edgesthereof or being marred thereby.

To the accomplishment of at least one of these objects, a feature of the invention contemplates the provision in a perforating machine having a perforating die and a die striking plate, at least one of which is mounted to yield under resistance from the other, between which the work is penetrated and pierced by the cutting edges of the die and means for causing the cutting edges of the die to receive the entire penetrating pressure, of means independent of the cutting edges and coming into action at the moment they piercev the work for shouldering from the cutting-edges .of the die substantially the entire piercing pressure.

, Broadly considered, the perforating die and the -die striking plate may be constructed and arranged' to move relatively to cause the cutting edges of the die to penetrate and pierce the work in accordance with the various modes of operation, adopted by different perforating machine manufacturers. It is preferred, however, to so construct and arrange the perforating die and the die striking plate that the latter in moving downwardly impales the work upon the upstanding cutting edges bf the die.

In the broader aspects of the invention, the

- which supports the die during the perforating line 3-3, Fig. 2, the die and its means independent of the cutting edges and coming into action at the moment they pierce the work for shouldering from the cutting edges of the die substantially the entire piercing pressure may take any form found desirable or expedient and may be located on the die, the striking plate, independently of either of them, or divided between the die and the striking plate.

Broadly considered, both the dieand the die striking plate or either of them may be mounted to yield. To avoid duplication of the yielding feature in each die of the interchangeable series, it is preferred to build the yield into some other readily removable part of the machine, such as the support for the' die striking plate or the block operation.

Accordingly, another feature of the present invention contemplates the provision in a perforating machine having a perforating die and a die striking plate between which the work is penetrated and pierced by the cutting edges of the die, a plunger having a constant stroke for operating the die striking plate, the plate and the plane of the cutting edges of the die being normally spaced apart a distance less than the work piercing stroke of the plunger, and means permitting the die and the striking plate to yield relatively during the penetration of the work by the cutting edges of the die, of means independent of the cutting edges for causing them to kiss the striking plate at the moment the cutting edges pierce the work.

Other features of the present invention reside in certain constructions and arrangements of parts hereinafter described and then set forth broadly and in detail in the appended claims which possess advantages readily understood by those skilled in the art.

The various features of the present invention will be understood readily from an inspection of the accompanying drawings, in which,

Figure 1 is a detail view in front elevation showing the various features of the invention embodied in a perforating machine of the Brockton type in which the striking plate in moving downwardly impales the work upon the upstanding cutting edges of the die, the means independent of the cutting edges for causing them to kiss the striking plate at the moment the cutting edges pierce the work being shown as located on the die;

Fig. 2 is a detail view in front elevation showing the opening in the frame of the Br0ckton" machine in which the striking plate reciprocates vertically and in which the die and its Su porting block are mounted during flat-bed die perforating and combined ink-marking and perforating, the means independent of the cutting edges for causing them to kiss the striking plate .at the moment the cuttingedges-pierce the work being shown as located on the flat ledge on the frame surrounding three sides of the opening therein;

1 Fig. 3 is a detail view in sectionalplan on the supporting block having been removed;

Fig. 4 is a detail view in plan of the die, the work support having been removed to show underlying parts; 1

Fig. 5 is a detail view in left side elevation of the die, the work support having been replaced;

Fig. 6 is a detail view in sectional elevation on the line 6-6, Fig, 4;

Fig. 7 is -a detail view in plan of the die, the

marking, tube and knife plates having been removed to show underlying parts;

Fig. 8 is a detail view in sectional elevation on the line- 88, Fig. '7;

Fig. 9 is a detail view in sectional elevation on the line 9-9, Fig. 4, and

Fig. 10 is a detail view in plan (reduced scale) of the work support.

For convenience in disclosure, the various features of the present invention have been illustrated and described as being embodied in the Brockton perforating machine, the construction and mode of operation of which is disclosed in my Patents Nos. 2,084,869, 2,093,099 and 2,- 108,447, issued, respectively, June 22, 1937, September 14, 1937, and February 15, 1938. Generally, the Brockton perforating machine, embodying the various features of the present invention, has the same construction and mode of operation as the Brockton" perforating machine disclosed in my Patent No. 2,084,869, except that the pressure adjustment 35 disclosed inv Fig. 3 of this patent has been eliminated to impart a constant stroke to the plunger or platen 2| therein and all mechanism relating to the paper facing for the die striking plate 23 has been removed.

In the embodiment of the invention illustrated in Fig. 1, the downwardly moving platen or plunger ll of the Brockton perforating ma chine is provided with a groove 12 which receives a tongue on a plate l3 from which the die striking plate i4 is supported. The plunger is reciprocated vertically to cause the die striking plate E4 to impale the work on the upstanding cutting edges of a die which is mounted on a block l5, which is like the block l6 disclosed in Fig, 2 of my Patent No. 2,108,447, February 15, 1938.

For purposes of disclosure, the die is illustrated and described as a combined ink-marking and perforating die of the type disclosed in my pending application Serial No. 194,299, filed March 7, 1938. As usual in this type of die, the perforating tubes 86 and the knife l1, (Fig. 6), are mounted, respectively, in a tube holder plate 18 and a knife holder plate H) which are supported by a rest plate 20 carried in turn by a die block 2|, the front face of which is provided with a handle 22 to facilitate the movement of the die into and out of the machine and from and to a position of pressure to and from a position of clearance.

Supported from the bottom of the die block 2| is a guide plate 23, the opposite side edges of which project beyond the corresponding edges of the block, (Figs. 7 and 8), to form ledges 24 which slide in the guideways 25, (Figs. 1 and 2), of the tracks 26 projecting forwardlyfrom the block l5.

' In the Brockton perforating machines as heretofore constructed, a pressure adjustment was provided to permit the operative to adjust the length of the stroke of the plunger and thus vary the pressure exerted by the striking plate en ropic For of 'discloseure, Fig. 1 illustrates In accordance with the broad feature of thethe die striking plate M as being mounted yieldingly onthe plate i3, the die as being mounted yieldingly on the block l6, and the block I! as being mounted yieldingly on the'bed 27, which is like the bed l2 disclosed in my Patent No.

2,108,447, .but it will be understood by those skilled in the art that generally only one-formof the three, yields illustrated in Fig. 1 need be employed at a time, although an unusual operating condition may require more than one of the yields and possibly all three of them. While one of the yields is illustrated as being embodied in the die, it may be more practicable to restrict the location of the yield to another readily removable part of the machine, such as between the plates l3 and i4. (Figs. 1 and 2), or on the bottom of the block i5, (Fig. 1), thus to avoid building a yield into each die of the interchangeable series.

Referring to Figs. 1 and 2, the die striking plate I4 is tapped to receive the screwed ends of bolts 26, the shanks 21 of which pass loosely through the plate l3 and a sheet of rubber 28 interposed between the plates l3 and H, a head 29 on each bolt 26 serving to limit normally the position of the die striking plate |4 relatively to the plate l3. Referring to Figs. 8 and 9, a sheet of rubber 36 is interposed between the bottom of the die block 2| and the plate 23. To hold the rubber sheet 30 in place and to permit it to function as a yield, the plate 23 has six posts 3|, (Fig. 8), riveted to it, each post passing loosely through the rubber sheet 36 and the die block 2i, and internally threaded to receive a screw 32, (Figs. '7 and 8), which clamps a collar .33 against the top of the post. The collar 33 engages the bottom of a recess 34 formed in the die block 2| to limit normally the position of the 'plate 23 therefrom.

Referring to Fig.1, asheet of rubber 35 1s interposed between the bottom of the block I and a plate 36, the rubber sheet 35 and the plate 36 being secured to the block I 5 to form a yield therefor by posts 31 which function like the posts 3|, (Fig. 8), and which are secured to the block ii in a manner similar to that employed in securing the posts 3| to the die block 2|.

In order to discharge the pills formed by the perforating tubes 6 and the blank formed by the knife out of the machine, pill conduits 38 (Fig.

9), and a blank conduit 39, (Fig. 6), are formed through the rest plate 28, die block 2|, plate 23 and rubber sheet 30. The pills and blank drop downupon the top of the block l5 and arewiped therefrom by the adjacent walls of the pill and blank conduits when the die is withdrawn from its position of pressure towards its position of clearance.

As usual in this type of die, a marking plate 46, (Figs. 1, 2, 4, and 9), carrying marking edges 4| is provided. 'I'he'plate 40 is provided with six depending posts 42,.(Fig. 9). the bottoms of each I of which is provided with a collar. 43. Each of the posts 42 is supported from the die block 2| .by a coiled spring 44 which is interposed between the collar43 and the bottom of a recess 45, (Fig. 9), formed in the die block. The springs 44 maintainthe marking plate-46 in-a plane above the cutting edges of the die. The marking plate 46 is provided with suitable holes to permit the passage therethrough of the cutting edges of the tubes 6 when the plate 40 is depressed by the striking plate |4 during the combined ink-mark- .ing and perforating operation.

' 20, sothat the head may be clamped between invention disclosed in my Patent No. 2,093,099, the work is mounted upon a combined work support and stripper plate 46, (Figs. 1', 2, 5 and provided with apertures across which the work is drum-headed by the striking plate during the combined ink-marking and perforating operation.

The plate 46 is supported from a plate 41 (Figs. 4 and 5) secured to and projecting from the back end of the die block 2|.

The plate 41 is provided with three upstanding posts 48- rigidly secured thereto. The up- Serial No. 194,299, filed March 7,.1938.

In order to prevent the work supporting plate 46 from falling down upon'the marking edges 4|, the die block 2| carries two blocks 5| and 52, (Fig. 4), each having two

openings

53 and 54 therein, through each of which a post 55 (Fig. 8) passes loosely. The post 55 is maintained normally in the position of Fig. 8 by a coiled spring 56 interposed between the bottom of a recess 51 formed in the die block 2| and the bottom of a chamber 58 formed in the post, the spring serving to hold normally a shoulder on the bottom of the post against the bottom of the block.

When the work is located on the work supporting plate 46 and the die is moved into. the

- position of pressure, the Brockton perforating per ends of the posts 46 pass loosely through a tration thereof, the cutting edges of the die and the striking plate are protected from injury. If, without more, the cutting edges of the die were to complete the penetration of the work and ened steel means having die striking plate impact surfaces arrangedin the'same plane as the cutting edges of the die. For purposes of disclosure, these hardened steel means are illustrated as elongated blocks, 63, 63.- 6| and 62, and as a cylindrical post 63, in Figs. 1, 4,5 and 6. The

blocks

53', 66, 6| and" are secured rigidly to the plate II in a location clear of the work; The post 63' operates through registered openings in the work supporting plate 46 and the underlying marking plate 43. The post 63, however, clears the work in order that its upper impact surface may contact the striking plate l4. of the post 63 is provided with a head 64 which is seated in a recess therefor-formed in the plate the Plate is and the die block 2|.

Ihe bottom der from the cutting edges substantially the entire piercing pressure. When they are mounted on the die, their impact surfaces should be arranged in the-plane of the cutting-edges of the die. If they were mounted on the striking plate, their impact surfaces would be arranged to contact some fixed part of the die clear of the work at the moment the die cutting edges pierce the work. Preferably, .the means for shouldering from the cutting edges of the die substantially I the entire piercing pressure are interposed between the striking plate and the die, whether or not they are all on the die or all on the striking plate, or divided between them.

However, in some instance, it may be desirable ito locate on the machine frame the means for causing the die cutting edges to kiss the striking plate at the moment the cutting edges pierce the work, To this end, the fiat ledge 65, (Fig. 3), bounding three sides of the opening 66, (Fig. 2), in the frame of the Brockton perforating machine may be provided with four posts 61 .igidly secured thereto. .Thelupper ends'of these posts,

constituting the die striking plate impact surfaces,

are located in the same plane as the die cutting edges, so that when the die is depressed during the penetration of the cutting edges into the work, the impact surfaces on the posts will come into action at the moment the cutting edges pierce the work to shoulder from the cutting edges substantially the entire piercing pressure and thus cause the cutting edges to kiss the striking plate in an innocuous manner. of course, if the yield were built into the die or its support, the upper ends of the posts 61 would be normally located in a plane just below the cutting edges of the die.

Nothing herein explained is to be interpreted as limiting the various features of the present invention in the scope of its application to use in connection with the particular machine or the particular mode of operation or any combination thereof selectedfor purposes of illustration and explanation. While the particulars of construction herein 'set forth are' well suited to one 'mech'anical form of the invention and to the uses to which it is put, it is not limited as :to these uses, nor to thesedetails of construction, nor to' and expressions inclusive of various modifications.

What is claimed as new, is: v 1. In a perforating machine, the combination with a perforating die and a die striking plate, at least one of which is mounted to yield under resistance from the other, between which.

the workis penetrated and pierced by the cutting edges ofthe die, and means for causing the cutting edges of the 'die to receive the entire-pene+ trating pressure, of means independent of the cutting edges andcoming into action at themoment they pierce the work for shouldering from the cutting edges of the die substantially the entire piercing pressure.

2. In a perforating machine, the combination with a perforating die and a die striking plate between which the work is penetrated and pierced by the cutting edges of the die, a plunger having a constant stroke for operating the die striking plate, the striking plate and the plane of the cutting edges of the die being normally spaced apart a distance less than the work piercing stroke of the plunger, and means permitting the die and the die striking plate to yield relatively during the penetration of the work by the cutting edges of the die, of means independent of the cutting edges for causing them to kiss the striking plate at the moment the cutting edges pierce the work.

3. In a perforating machine, the combination with a perforating die and a diestriking plate between which the work ispenetrated and pierced by the cuttingedges of the die, a plunger having a constant stroke for operating the die striking plate, the striking plate and the plane of the cutting edges of the die being normally spaced apart a distance less than the work piercing stroke of the plunger, and means permitting the die and the die striking plate to yield relatively during the penetration of the work by the cutting edges of the die, of means independent of the cutting edges and interposed between the die and the die striking plate for causing the cutting edges of the die to kiss the striking plate at the moment the cutting edges pierce the work.

4. In a perforating machine, the combination with a perforating die and a die striking plate between which the work is penetrated and pierced by the cutting edges of the die, a plunger having a constant stroke for operating the die striking plate, the striking plate and the plane of the cutting edges of the die being normally spaced apart a distance less than the work piercing stroke of the plunger, and means permitting the -die and the die striking plate to yield relatively during the penetration of the work by the cutting edges of the die, of means mounted on the die independent of the cutting edges for causing them to kiss the striking plate at the moment the cutting edges pierce the Work.

5. In a perforating machine, the combination with a perforating die and a die striking plate between which the work is penetrated and pierced by the cutting edges of the die, a plunger having a constant stroke for operatingthe die striking plate, the striking plate and the plane of the Y cutting edges of the die being normally spaced apart a distance less than the work piercing stroke of" the plunger, and means permitting the die and the die striking plate to yield relatively during the penetrationof the work by the cutting edges of the die, of rigid means on the ma chine frame for causing the cutting edges of the die to kiss the striking plate at the moment the cutting edges pierce the work.

6. In a perforating machine, the combination with a perforating-die and a die striking plate between which the work is impaled on the cutting edges of:the die, and meanspermitting at least one of them, the die and the plate, to yield under the impaling pressure, of rigid means mounted on the die having a striking plate impact surface arranged in the plane of said edges.

s'rIG E. ROSENBERG.