US2312727A - Stamping device - Google Patents

Description

March 2, 1943. J. NISENSON 2,312,727

' ST'AMPING DEVICE' Fil d Dec. 6,1940 2 Sheets-Sheet 1 INVENTOR. June's N/ss/vsmv .BY I

- 4TTO/PNEY March 1943- J. NISE N SON i 2,312,727

STAMPING DEVICE 4 Filed Dec. 6, 1940- 2 Sheets-Sheet 2 m. H nan, 2

INVENTOR. Jubss N/ss/vsu/v wan 7M 4 TTORA/E Y Patented Mar. 2, 1943 UNETED res STAMPING DEVICE Jules Nisenson, New York, Y., assignor to Kent Hardware Mfg. Corp., New York, N. Y., a corporation of New York Application December 6, 1940, Serial No. 368,947

5 Claims. (cum-s27) device is not in use or between successive stamping operations.

While devices having these general characteristics are well known in the art and have been in use, they have been open to the objection that by reason of the construction thereof they have been of relatively high price. Since in so many fields of trade and industry so called rubber stamps are used for innumerable purposes, the fact that the prior art stamping devices have been of such high cost has seriously limited their distribution and use.

In accordance with the present invention, an automatic or self-inking stamping device is provided which can be manufactured in large quantities at extremely low cost. The present device "permits of such large scale, low cost production for many reasons, among which are the fact that practically all of the parts are stamped and formed from sheet metal and, by reason of the novel construction and mode of operation, the tolerances of dimensions of the stamped parts are not close, but may be merely commercial tolerances.

Among the objects of the present invention, lies the provision of self-inking stamping device structure which is light in weight, with a consequent. saving in metal and shipping costs, yet in which the center of gravity is suitably disposed so that the device will stand upright in normal use.

Another object herein lies in the provision of structure of the class described wherein means are provided for the detachable engagement of the printing medium with relation to the stamping device so that the same device may be utilized successively for a plurality of different mediums.

Another object herein lies in the provision of an automatically self-inking stamping device which may be operated readily without failure in operation, that is, even when the device is operated at relatively high speed, the inking will occur between each printing operation.

Another object herein lies in the provision of a device of the class described wherein the parts are so organized that the device gives a pleasing appearance.

A feature of the present device lies in the fact that full vision by the operator is permitted of the surface on which the printed impression is to be made prior to the actual printing operation.

These objects and other incidental ends and advantages will more fully appear in the progress of this disclosure and be pointed out in the appended claims.

In th drawings constituting a material part hereof, similar reference characters designate corresponding parts throughout the several views in which:

Figure 1 is a front elevational View of the device, shown in its normal or extended position, in which parts are broken away for the purpose of clarity. This figure is the actual size of one of the successful models completed by the applicant. v

Figure'z is a fragmentary elevational view of Figure 1 as seen from the right side thereof.

Figure 3 is an enlarged vertical sectional View as seen from the plane 33 on Figure '1.- I

Figure 4 is a horizontal sectional view as might .be seen from the plane 4-4 on Figure 3, and

in which certain of the parts are broken away for the purpose of clarity. 1

Figure 5 is a horizontal sectional view as might be seen from the plane 5-5 on Figure 3, the axle being shown in elevation.

Figure 6A is a view in perspective showing the printing medium carrier support.

Figure 6-13 is a view taken similarly to Figure 6A, but shows the printing medium and carrier.

Figure 7 is a fragmentary view in perspective showing the lower end of the spring guard tube, and the upper portion of the lower frame. In this View, the parts are in a position just prior to their attachment to. each other.

Figure 8 is a plan view showing two upper frame blanks in planar condition prior to the forming thereof to create the upper frame.

Figure9 is a fragmentary view in perspective .showing:the upper portions of two of the upper frame forming blanks after they have been formed and placed in proper position with rela-- tion to each other. In this figure the upper frame locking plate is shown in dot-dash lines.

Figure 10 is a plan view showing the blank which is subsequently formed into the lower frame.

Figure 11 is a fragmentary sectional view as seen from the plane I l--l l on Figure 4. v.In accordance with the invention, the automatic self-inking stamping device is indicated generally by numeral 20, and comprises broadly a handle 2|; an upper frame 22; an upper frame locking plate 23; a lower frame 24; a spring guard tube 25; an inking pad 26; a printing medium 21; a printing medium cushion 28; a printing medium carrier 29; a printing medium carrier support 39; and an axle 3|.

The upper frame 22 and the handle 2| are integrated with each other and move as a unit. The upper frame 22 is composed of twoidentical upper frame members 32 and 33. Since both are identical, a description of one will sufiice for both, and where this description will be clarified thereby, singly primed reference characters appear in the drawings to designate the opposite part.

Turning now to the lower blank 33 in Figure 8, it may be seen that this blank is of such an ex: ternal configuration that the same maybe diecut from sheet strip stock, preferably steel. The strip stock may be of a width equal to the distance between the side edge34 and the side edge 35. The bottom edge 36 may be rounded as shown at 3! and 38. Adjacent the lower edge 36 and disposed along the central longitudinal axis of the member 33, said member is provided with an orifice 39, which subsequently serves as a journal for the axle 3|. Adjacent the orifice 39, the edge 34 is provided with an indentation 49 which serves as a detent in cooperation with the latch 4| (best seen in Figure 2). The edges 34 and 35 are provided with notches 42 and 43 respectively. The upper end of the blank for the member 33 is provided with right-angled indentations v44 and 4,5 and the top tab 46 is provided with a plurality of serrations 41. The serrations 41 are asymmetrically arranged so that when the members 32 and 33 are brought together, only one of the members having been rotated through 180 in the same plane the serrations 41 and 41 nest as is shown .in Figure 8.

In forming up the upper frame member 33, the material is given a series of right-angled bends along the bending lines 48, 49., 59, and The member 33 will take on a shape best seen in Figure 9.

The configuration of the upper frame locking plate 23 is best seen in Figure 9. In view of the simple construction thereof, a figure showing the blank therefor is not shownin the drawings. The locking plate 23 may be fabricated from a cutting fromv a piece of 'strip stock and includes a .top wall 52 and crimped flanges 53, and 54, as well as a rectangular orifice 55.

The fabrication of the upper frame 22 may thus be seen schematically illustrated in Figure 9 in which a; pair of oppositely disposed upper frame members 32 and 33 are positioned as there shown, and the upper frame locking plate 23 is passed downwardly over the upper portions of said members which penetrate the rectangular orifice 5.5. When the lower surface of the wall 52 is in contact with the upper surfaces of the portions 56 and 51 of the members 32 and 33, the crimping flanges 53 .and 54 are crimped downwardly about the side edges of the portions 56 and .51 thereby forming an integrated unit.

The handle 2| maybe made of any desirable material such as plastic or of wood, and the same is provided with a bore 58. The bore 58 is disposed along the longitudinal central axis thereof and may be either polygonal or circular in cross section. That is to say, the bore 58 may have the same internalconfiguration as the external configuration formed by the material disposed between the bends 49, 59, 49' and '59. When the internal configuration of the bore is circular, it is found that the bends 49, .59, 49' and 5:9 fricintegrate the handle 2| with the upper frame 22. Since in normal operation pressure upon the handle 2| is always downward, no other attaching means need normally be required, as constant use tends to force the handle 2| into its proper position.

The lower frame 24 is preferably fabricated from a die-cut blank taken from a strip of material preferably steel. As seen in Figure 10, such a blank may be cut from a strip of material of a width equal to the distance between the long edges 59 and 69. The narrow or bottom edges GI and 62 may have the corners thereof rounded as indicated at 63, 84, 95, and 96. The edges 59 tionally engage said bore in such a manner as to and 89 are provided with indentations Bl, 68, 69, and T9. The bend lines 14, 15, 16, and 1'! mark the blank so as to form a top wall 78, the legs 19 and ,89; and the inking pad retaining portions 8| and 82. The blank for the lower frame 24 is provided at the center thereof in the top wall '18 as seen in Figure 10, with a disk-shaped indentation which manifests itself as a projection or platform 1|, best seen in Figures 1, 3, and 7. This platform is provided with a pair of oppositely disposed arcuately shaped orifices l2 and 13. The legs 19 and 89 are each provided with guide slots 83 and .84 which are of irregular configuration, best seen in Figure 10, and include guide slot upper portions 85 and 86, inverting or reversing portions 81 and 88, and lower portions 89 and 99. Spaced substantially concentrically with relation to the curved edges of the slot portions 81 and 88 adjacent thereto, are upper projections 9| and 92 and lowerprojections 93 and 94. While the edges of the guide slots 83 and 84 which are disposed oppositely to the reversing portions 8'! and 83 are shown as substantially rectilinear in full lines in Figure 10, a slightly smoother operation may be obtained by relieving said edges as indicated by the dotted lines 95 and 96. A series of rightangled bends are made to fabricate thelower frame 24, and as viewed in Figure 10, the feet 91 and 98 are formed by bending rearwardly along the bend lines 99 and I99, while the legs 19 and 89 as well as the inking pad retaining portions 8| and 82 are formed by bending forwardly along the lines 14 to I! inclusive. In thus forming the blank for the lower frame 24, projections 9| to 94 inclusive will face inwardly of said frame while the platform ll will extend upwardly therefrom. The leg 89 is provided with an orifice |9| which serves to pivotally mount the latch 4| by means of a rivet I02.

The printing medium 21 may be of any d..- sired cpnstruction well known in the art to which the present invention relates. The printing medium 2'! may be a so called rubber plate in which the type face extends above the general level of the medium and is in reverse arrangement. The printing medium may, however, be made of such materials as metal or plastic castings, wood cuts, etc. The printing medium 2'! is preferably mounted upon the printing medium cushion 28 which may be of any suitable resilient material, preferably sponge rubber. however. This cushion serves its usual purpose, which is to equalize the pressure on the printing medium '21 so that a uniform impression is obtained upon a surface being printed. The printing medium carrier 29 is preferably formed from sheet material and includes a top wall Hi3, rear wall I94, and a front edge ms. The rear wall is provided with a pair of inwardly extending hook-shape tabs I96 and I91, and the front edge J85 is provided with a handle tab H38, which is domed-shape projection I09.

The printing medium carrier support 39 is preferably formed from sheet material and includes a top wall H9, a rear wall II I, a front wall H2, and side walls H3 and H4. The rear wall III is provided with a pair of indentations H5 and H6. The printing medium carrier 29 is detachably engageable with the carrier support 30.

The front wall H2 is provided with a pair of indentations Ill and H8 which are symmetrical and oppositely disposed with relation to the indentations H5 and H6. The rear wall III and the front wall I I2 are provided with indentations H9 and I29.

The printing medium carrier 29 is detachably engageable with the carrier support 39 by means of hooking tabs'IIifi and I91 into either of the pairs of indentations I|5-I I6 or IIII I8, and then placing the under surface of' the top wall I93 incontact with the upper surface of the top wall H0. This is followed by pulling the handle tab I08 downwardly so that the dome-shaped projection I09 snaps into and engages one of the indentations H9 or I29. In the embodiment here illustrated, the printing medium carrier 29 may be placed upon the printing medium carrier support in either of two positions, the parts being reversible with relation to each other. It will of course be obvious that where such reversibility is not desired, one of the pairs of slots I Ifi-I I9, or III-I I8, as well as one of the indentations I I9 or I20 may be eliminated.

The top wall I I9 is provided with an elongated orifice I2| through which may be read certain indicia placed upon the under surface of the top wall I93 so that a user of the device may see what the printing medium 21 will print by mere- 1y inverting the device 29 and looking through the orifice |2I.

The side walls H3 and H4 are each provided with aligned and oppositely disposed orifices I22 and bosses I 23. The bosses I23 are located on tab-like extensions extending downwardly from the side walls H3 and H4.

The device 29 may be assembled as follows:

The printing medium 2! is preferably adhesively secured to the upper surface of the cushion 28; while the lower surface of the cushion 28 is preferably adhesively secured to the upper surface of the top wall I93.

The tabs I24 on the lower end of the spring guard tube 25 are inserted within the orifices I2 and I3 and are swaged over thereby integrating the tube 25 with the lower frame 24. The inking pad 26 is preferably adhesively secured to the under surface of the top wall I8.

The upper frame members 32 and 33 having been integrated by means of the upper frame locking plate 23, the handle 2| is put in place as has been previously described. The expansive coil spring !25 is placed within the spring guard tube 25 and said spring and tube are then inserted within the upper portions of the frame members 32 and 33. The printing medium carrier support 39 is placed between the inner opposed surfaces of the legs I9 and 99, which in turn have been nested between the inner opposed surfaces of the lower portions of the upper frame members 32 and 33. The orifices I22 are aligned with the guide slots 83 and 84 and the orifices 39 and 39'. The axle 3| is then inserted through the said aligned orifices and slots and the ends thereof are headed over. The parts will then appear as shown in Figure 5'. The expansion of the spring I25 will move the various parts so that the device 29 will appear in its extended position as seen in Figures 1 and 3.

Operation portions 85 and 99 of theguide slots being of such length with relation to the combined thickness of the inking pad 29, the printing medium 21, and the cushion 28, that when the printing medium 21 fully and properly contacts the under surface of the inking pad 23, there is a certain amount of space existing between the axle 3| and the'upper ends of the upper slot portions 85 and 83.

..,The device 29 is placed over a surface to be printed with the feet 91 and 98 resting upon such surface. Downward manual pressure is applied to the handle 2| which causes the upper frame 22 to be moved downwardly against the expansive pressure of the spring I25. The outer ends of the axle 3|, being trunnioned in the orifices 39 and 39' in the lower portion of the upper frame 22, will move downwardly therewith, and since the printing medium carrier support 39 is rotatably carried upon the axle 3|, said support 39 will likewise be carried downwardly.

As the support 39 travels downwardly, the lower edges of the side walls H3 and H4 of said support will strike the upper projections 9| and 92.

Since the projections 9| and 92 are laterally displaced with relation to the axle 3|, the upper projections 9| and 92 will cause the support 39 to rotate about the axle 3| through This rotation will cause the bosses I23 to enter the reversing portion 81 and 98 of the guide slots 83 and 84. This position of the support 30 is indicated by the dash double-dot lines in Figure 3.

Further downward movement of the axle .35 will then cause the support to rotate about a horizontal axis through the bosses I23 which are at this time pocketed in the reversing portions 81 and 39.

After the axle 3| ha entered the lower slot portions 89 and 99, it then pulls the support 39 downwardly with the bosses I23 following. The bosses I23 are thus disposed upwardly of the axle 3| at this stage. The axle 3| in traveling downward thus pulls the bosses I23 into the lower portions 89 and 99 of the guide slots and since said lower portions 89 and 99 are of a length at least equal to the distance between the axle 3| and the bosses I23, the axle and bosses must line up in the lower slot portions and therefore must line up the support 39 so that the printing medium 21 is at right angles to the principal direction of the guide slots and parallel to the surface upon which the printing i to be placed and upon which the feet 91 and 99 are resting. Here again sufficient clearance must be allowed in the ends of the lower portions 99 and 99 of the guide slots 83 and 84 so that the full manual pressure applied to the handle 2| may be communicated to the printing medium 21.

After the printing is completed, the manual pressure upon the handle 2| is released. The expansive pressure of the spring I25 raises the handle and the upper frame 22 which thereby pulls the axle 3| upwardly.

In its upward travel the axle 3| pulls the then upper edges of the side Walls H3 and H4 into contact with the lower projections 93 and 94. These projections tilt the support 30 so that the bosses I23 again enter the reversing portion 81 and 88 of the guide slots, thereby rotating the support through 90. Further movement of the axle 31 in an upward direction pulls the bosses I23 out of the reversing portions of the guide slots thereby completing the rotation of the support through another 90 and returning it to its original position as indicated by the full lines on Figure 3.

When it is desired to either change the printing medium or to re-ink the pad 26, it becomes only necessary to manually move the handle 2| downward until the latch 4| is opposite the notch 40 or 40, as the case may be. Manual movement of one of the pointed end of the latch 4| into said notch will maintain the support 30 in a position indicated by the dot-dash lines on Figure 3, even after the manual pressure upon the handle 2| is released. Ready access is then available for the purpose of re-inking the pad 26 and the printing medium carrier 29 may be readily detached for the purpose of substituting therefor another such carrier having a printing medium with diiferent characters thereon. Release of the latch 4! will permit the parts to assume their normal extended position ready for the next printing operation.

Where desired, certain of the parts may receive decorative treatment, as for example, a streamlined beading l30 which is applied to the outer portions of the upper frame 22, as indicated in Figures 1 and 2.

Where desired to reduce the cost of the device, or where the ability to substitute different printing mediums is not needed, the orifice I2l in the top wall H of the support may be omitted as well as the carrier 29, and the lower surface of the cushion 28 may then be directly adhesively secured to the upper surface of the top wall Ill].

It may thus be seen that I have disclosed the construction of a novel and useful stamping device which presents a good appearance, is light in weight, and is low in manufacturing cost. This device automatically re-inks the printing medium between printing operation and is extremely convenient, rapid, and fool-proof in use. The latch 4! may be also utilized for the purpose of reducing the total over-all size of the device during shipment. Means are provided whereby a plurality of printing mediums may be readily switched about so that the same device may be used for printing a considerable number of printing characters.

I wish it to be understood that I do not desire to be 1imited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

I claim:

1. A stamping device of the class described, comprising: a lower frame having a leg with a slot therein including a reversing portion; an upper frame movable with relation to the lower frame and having a leg; a printing medium carrier support having a boss; means penetrating the slot in the lower frame leg and pivotally connecting the carrier support to the leg of the upper frame; said boss being slidably disposed in said slot.

2. A stamping device of the class described, comprising: a lower frame of substantially inverted U shape having a pair of opposite, spaced and parallel legs; said legs each having a slot therein including a reversing portion; an upper frame of substantially inverted U shape having a pair of opposite, spaced and parallel legs disposed outwardly of the lower frame legs, the upper frame being movable with relation to the lower frame; a printing medium carrier support having a pair of oppositely disposed bosses slidably disposed in said slots; means penetrating the said slots and rotatably connecting the carrier support to the legs of the upper frame.

3. A stamping device of the class described, comprising: a lower frame having a leg with a slot therein, including a reversing portion; a projection on said lower frame leg adjacent the said reversing portion of the slot; an upper frame movable with relation to the lower frame and having a leg; a printing medium carrier support having a boss slidably disposed in said slot; means penetrating the slot in the lower frame leg and pivotally connecting the carrier support to the leg of the upper frame; said projection on the lower frame leg co-acting with the carrier support causing the carrier support to move therearound, bringing the boss into the said reversin portion of the slot.

4. A device as claimed in claim 3 having a pair of projections on the lower frame leg; said projections being oppositely disposed across the reversing portion of the slot.

5. A stamping device for use with an impression receiving surface comprising: an upper frame; a lower frame having a pair of spaced parallel legs each having a slot and an upper and lower projection; a printing medium carrier support having a printing medium thereon and a pair of bosses; an axle penetrating said slots and pivotally connecting the printing medium carrier support at a point between the bosses and the printing medium, to the upper frame; said slots each being substantially rectilinear and having a reversing portion extending laterally at right angles thereto; said bosses riding in said slots and being forced into the reversing portion of said slots by the action of the upper or lower projections on the lower frame legs striking the printing medium carrier support eccentrically when the upper frame is reciprocated.

6. In a stamping device of the class described: an upper frame of substantially U shape including a pair of upper frame members, each having a leg portion and a handle supporting portion; an upper frame locking plate securing said upper frame members together at the upper portion thereof.

JULES NISENSON.

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