US2660245A

US2660245A - Sheet stock punch head housing

Info

Publication number: US2660245A
Application number: US178119A
Authority: US
Inventors: Allan O Marsh
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-08-07
Filing date: 1950-08-07
Publication date: 1953-11-24
Anticipated expiration: 1970-11-24

Description

Nov- 24. 1953 A. o. MARSH SHEET STOCK PUNCH HEAD HOUSING Filed Aug. 7; 1950 MHESH, INVENTOR.

Patented Nov. 24, 1953 UNITED STATE OFFICE SHEET STOCK PUNCH HEAD HOUSING Allan 0. Marsh, Los Angeles, Calif.

Application August 7, 1950, Serial No. 178,119

4 Claims. (01. 164-91) my prior'United States Letters Patent 2,587,185,

patented February 26 1952 on an application filed Septemberl'I, 1946. The claims in the aforementioned patent are directed generally to an operating rod coasting with a punch head. whereas the present application isdirected generally, as indicated in the preceding paragraph, to a punch head housing which houses and mounts essential elements for performing a punching operation. 7 I

It is therefore an object of the present invention to provide a novel housing of sheet stock which is adapted to include the necessary com ponents for punching holes in paper.

Another object of the present invention is to provide a housing of this character characterized by its inexpensiveness, simplicity and ease of r manufacture in accordance with present day mass. production techniques. a

' In general, an object of the present invention is to provide an improved paper punch.

The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. This invention itself. both as to its organization and manner of operation, together with further objects and advantages thereof, maybe best understood by reference to the following description taken in connection with the-accompanying drawings in which:

' Figure 1 is a perspective view showing a paper punch embodying features of the present invention;

Figure2 is a sectional view taken substantially on the line 22 of Figure 1; a 1

Figure 3 is a sectional view taken. substantially on the line 3-4 of Figure 2; and

Figure 4 shows the general iorrrnnot necessarily in proportion, of the stamped sheet stock, in flat form, prior to its being formed as a housing for the component parts of the individual punches shown in the previous figures.

The punch consists essentially of a base member ID to which is releasably fastened, by means of knurled bolts It, in spaced relationship, a pair of punch heads H, I2 with a longitudinally grooved operating rod l3 passing through the individual punch heads 2 I, I2, such operating rod 7 having aflixed thereto a manually operable handle I4, operation of which results in rotation of the operating rod l3 and resulting downward movement of the punch die l5, which is operatively connected to the rod l3 in the manner shown in Figure 2. f

The present invention concerns itself particularly with the method of formig the die head housing It and resulting structure. Heretofore,

the housing for the die member It consisted of a relatively expensive casting or forging or other element which required expensive lathe operations in its fabrication. An important feature of the present invention is that such housing i8 is formed of prestamped sheet metal stock-.-

The sheet stock is stamped to have the general form shown in Figure 4. Such fiat sheet I9, shown in Figure 4, is centrally apertured at [9A and is bent back upon itself along generally a line represented by the dotted line 26 in the process of forming the tubular end portions 2!, 22 (Figure 3). It will be observed that the cylindrical portion or tube 22, in fact, comprises a pair of vertically aligned

tubular sections

22A and 22B.

The movable punching die 25, having an integrally formed annular flange l5A thereon, is mounted for vertical movement in the tubular portion 22A, with the longitudinally extending grooved portion !3A of operating rod i3 partially embracing a peripheral portion of the flange 15A, as shown in Figure 2.

This operating rod l3 passes through circular spaced bearing apertured portions NBC in each of the die heads 12. Such die punch i5 is normally biased upwardly by the coil compression spring 23, having its upper end bearing against the lower flange I5Bon the die punch and its lower end bearing against the spring retaining disk 24,

which is prevented from leaving the lower end of the tubular portion 22A by deforming the peripheral edges thereof, as for example by crimping, to produce the inwardly extending projecting portions 2213 (Figure 3). The lower die punch 25, in the form of a ring, which cooperates with the movable die punch it, may simply rest on the upper peripheral edge of the lower tubular sectionilZB, there being, as shown in Figure 2, an annular flange on the die memher 25 which prevents the die 25 from falling into the tubular section 22B, and there also being an inner annular flange portion 25A which cooperates with the inner walls of the lower tubular section 223 to maintain it in centered relationship with respect to the other die member [5.

It is observed that the base ID, to which the die heads are secured, has a recessed ledge IDA contiguous with a transversely extending guide [6B which conforms generally with the shape of the lower bulbous portion IEZE of the housing 18.

Such housing is preferably releasably secured for adjustment purposes to the base It? by means of knurled bolts It but, if desired, may be permanently afiixed thereto by rivets which pass through the tubular portion 2! and slotted portion of the base l0. Such slotted portion ifiC, as shown in Figure 1, extends transversely of the base H1 in a direction extending parallel with the longitudinal axis of the bulbous portion liJB.

A careful inspection of Figures 3 and 4 shows that the housing 58 formed from the prestamped flat sheet stock It is formed to provide the tubular portion 2!, the tubular portions 22A, 2213, as well as the circular bearing portion [330 (Figure 2).

The housing I8 thus consists essentially of a double layer of juxtapositioned sheet metal 1naterial Welded together, as for example by welding material 30. Each of such juxtapositioned layers have cooperating reentrant portions which define the pair of cylindrical portions 2 l, 22 having their parallel axes extending generally parallel with I;

the planes of such sheet layers. Also, each of such layers define the paper opening 2'1 provided by the apertured portion ISA, such reentrant portion 21 (Figure 2) being contiguous with one edge of the juxtapositioned layers and extending through the cylindrical portion 22 to divide the same into two vertically aligned

cylindrical portions

22A, 22B. The upper tubular section 22A is intersected by a cylindrical portion lfiq'having its axis extending generally perpendicular to the axes of the juxtapositioned layers provided by the formed sheet [9.

It is evident, from the teachings incorporated herein, that the juxtapositioned layers of sheet material shown in Figure 3 may have their ends terminating other than as shown in Figure 3, where such ends 19E, [F abut on the circumference of the tubular section 2|. It is preferred that these ends 1923, IEF abut as shown in Figure 3 instead of on the circumference of the tubular section 22, since the tubular section 22 should be stronger than the tubular section 2|. As men tioned above, such tubular section 21 may be clamped either permanently or semi-permanently to the base iii, and when, as preferred, the knurled bolt is is used, the housing [8 ma be released from the base by loosening the hexagonal nut 33 threaded on the bolt l6.

While the particular embodiments of the present invention have been shown and described, it will be obvious to those skilled in. the art that changes and modifications may be made without departing from this invention in its broader aspects and, therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of this invention.

I claim:

1. In a punch of the character described, a punch head housing comprising: a double layer of juxtapositioned sheet stock material, each layer having cooperating spaced reentrant portions which define a pair of cylindrical tubular portions having their parallel axes extending generally parallel with the planes of said sheet stock material, each of said layers having an apertured portion contiguous with one edge of said juxtapositioned layers and extending through one of said cylindrical portions to divide said one cylindrical portion into two vertically aligned spaced cylindrical portions, the upper one of said aligned spaced cylindrical portions being intersected by a third cylindrical portion defined between juxtapositioned layers and. having its axis extending generally perpendicular to the axis of said one cylindrical portion, a punch die supported for sliding movement in said upper one of said aligned cylindrical portions, said die having a shoulder thereon, an operating rod with a longitudinally extending grooved portion passing through said third cylindrical portion with the grooved portion thereof embracing said shoulder, a spring within said upper cylindrical portion and acting to bias said shoulder up into engagement with said grooved portion of said operating rod, a spring seat against which the lower end of said spring bears, means retaining said spring and spring seat within said cylindrical portion, a second cooperating cylindrical ring-shaped die disposed within the lower one of said aligned spaced cylindrical portions, and means retaining said second die on said lower cylindrical portion.

2. In a punch of the character described, a punch head housing comprising: a double layer of juxtapositioned sheet stock material, each layer having cooperating spaced reentrant portions which define a pair of cylindrical tubular portions having their parallel axes extending generally parallel with the planes of said sheet stock material, each of said layers having an apertured portion contiguous with one edge of said juxtapositioned layers and extending through one of said cylindrical portions to divide said one cylindrical portion into two vertically aligned spaced cylindrical portions, the upper one of said aligned spaced cylindrical portions being intersected by a third cylindrical portion defined between juxtapositioned layers and having its axis extending generally perpendicular to the ax1s of said one cylindrical portion, a punch die supported for sliding movement in said upper one of said aligned cylindrical portions, said die having a shoulder thereon, an operating rod with a longitudinally extending grooved portion passing through said third cylindrical portion with the grooved portion thereof embracing said shoulder, a spring within said upper cylindrical portion and acting to bias said shoulder up into engagement with said grooved portions of said c operating rod, a spring seat against which the lower end of said spring bears, and the lower edge of said upper cylindrical portion being deformed to retain said spring and said spring seat therein, and a second cooperating ring-shaped die disposed within the lower one of said aligned spaced cylindrical portions, and means retaining said second die on said lower cylindrical portion.

3. In a punch of the character described, a punch head housing comprising: a double layer of juxtapositioned sheet stock material, each layer having cooperating spaced reentrant portions which define a pair of cylindrical tubular portions having their parallel axes extending generally parallel with the planes of said sheet stock material, each of said layers having an apertured portion contiguous with one edge of said juxtapositioned layers and extending through one of said cylindrical portions to divide said one cylindrical portion into two vertically aligned spaced cylindrical portions, the upper one of said aligned spaced cylindrical portions being intersected by a third cylindrical portion defined between juxtapositioned layers and having its axis extending generally perpendicular to the axis of said one cylindrical portion, a punch die supported for sliding movement in the upper one of said aligned cylindrical portions, said die havinga shoulder thereon, and an operating rod. with a longitudinally extending grooved portion passing through said third cylindrical portion with the grooved portion thereof embracing said shoulder, a spring within said upper cylindrical portion and acting to bias said shoulder up into engagement with said grooved portion of said operating rod, a spring seat against which the lower end of said spring bears, and the lower edge of said upper cylindrical portion being deformed to retain said spring and said spring seat therein, and a second cooperating cylindrical ring shaped die disposed within the lower one of said aligned spaced cylindrical portions, said second die having an annular flange resting on the upper edge of said lower cylindrical portion.

4. In a punch of the character described, a punch head housing comprising: a double layer of juxtapositioned sheet stock material formed from a single sheet of material, each layer having cooperating spaced reentrant portions respectively at the center and at the ends of said sheet of material which define a pair of cylindrical tubular portions having their parallel axes extending generally parallel with the planes of said sheet stock material, each of said layers having an apertured portion contiguous with one edge of said juxtapositioned layers and extending through one of said cylindrical portions to divide said one cylindrical portion into two vertically aligned spaced cylindrical portions, the other one of said cylindrical portions including the abutting edges of said single sheet of material, the upper one of said aligned spaced cylindrical portions being intersected by a third cylindrical portion defined between juxtapositioned layers and having its axis extending generally perpendicular to the axis of said one cylindrical portion, a punch die supported for sliding movement in the upper one of said aligned cylindrical portions,

said die having a shoulder thereon, and an oper- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,060,772 Leniham May 6, 1913 1,152,886 Dom Sept. 7, 1915 1,940,883 Rollings Dec. 26, 1933 2,102,292 St. Louis et al Dec. 14, 1937 2,335,552 Unger Nov. 30, 1943 2,587,185

Marsh Feb. 26, 1952