US1966767A - Ink pad - Google Patents

Description

July 1.7, 1934. A` REICH l 1,966,767

INK PAD Filed Aug. .17, 1932 INI/ENTYOR ,44. .55H 7- F15/CH A Tree/wav.

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Patented July I7, 1934 INK PAD Albert Reich, Vienna, Austria Application August I7, 1932, Serial No. 629,200 ln Austria September 8, 1931 2 Claims.

The invention relates to an ink pad used in stamping.

Hitherto, these pads have generally been designed to have a stamping surface consisting of an adequate textile material such as felt. The pads have either been entirely made of felt with or without a support of wood, paper or other suitable material, or they are made of wood or a similar material, covered with felt, stui or the like. These pads are usually characterized by having a relatively soft surface i. e. by being cushion like. It is known that this type of pads is subject to numerous disadvantages.

Considering the Value of the object, the method of production is too complicated. Besides the obtaining of a correct degree of impregnation, is diincult and requires a great deal of care and experience.

The durability of the pad is rather restricted;

I the textile material wears ou; the tension de creases, folds and depressions are formed, seriously affecting the purity and the beauty of the impressions and marks. The quantity of ink available is rapidly consumed so as to render the impression colourless, pale and illegible. After re-impregnation, however, the impressions obtained are, at first, blotty, in particular if the tension of the pad has suffered when, in applying the stamp, the ink in excess will suddenly iiood the surface of the pad.

In order to eliminate these drawbacks, ink pads have been designed substantially consisting of nothing else but a little board, cut transversely -to the capillaries or" the wood and not covered with stuii. The hardness of the stamping surface together with the capillary eiect will permit to suppress the disadvantages cited. However, these wooden ink pads, do not lend themselves to general use on account of the fact that they cannot be impregnated with glycerine containf ing stamp inks, whilst the widest spread stamp inks are nearly all glycerine containing, it being known that glycerine inks have the tendency of swelling and of warping the wood so as to make same uneven.

The ink pad according to the present invention represents a valuable improvement in as far as it shows all advantages of the hard surface ink pads without suiiering from any oi" the drawbacks of the coverless wood ink pads. According to this invention, the pad consists of a plate made of hard, porous and artiiicial lter mass impregnated and saturated with stamping ink. For this purpose ebonite is particularly suitable. Yet porous artificial rosins, articial stones and other porous products used as lter plates may also be employed. Compared with the Wooden plates these porous artificial masses possess the advantage, that they are traversed by pores and channels in all directions, whilst the channels 0i' the wood are arranged in one direction only. This makes for a better distribution of the ink in the pad.

The ink pad is produced in such a manner, that e. g. a porous, line-grained ebonite plate, l0 min.

thick, having a porosity of air space with respect to the total Volume of the plate, is smoothed on both or at least on one side. This plate is placed into ak cup the bottom of which is covered with ordinary, glycerine holding stamp ink. Care should be taken, however, that the ink does not cover and ilood the ebonite plate. The plate is left in the cup untilunder the suction eiiect oi the plate-the ink will have appeared at its surface which process requires about 7 a minute. Then the plate is taken out and the ink in excess is inade to drip oii, whereupon the plate is placed in a casing, which is usually a sheet iron box, Then the ink pad is ready for use.

carried out in such a manner that they are placed one on top of the other whereby they are fed with ink at the same time. The ink remaining in excess after the impregnation of the first pad is `absorbed by the next and so on considering that the superposition of the pads makes for propagating their capillary or suction effect from one to another. Thus a great number of pads may be impregnated simultaneously without involving the use of a special device which feature is highly advantageous in manufacture. Before introducing the pads in the respective receptacles they are left to drip oil just as when impregnating pads singly one by one.

- 9 In order to ensure a continual re-impregnation of the pads during use, without being compelled to withdraw same from their receptacle which may be a sheet iron box, an ink reserve is kept under the plate which may be contained e. g., in a piece of paper or felt, a rubber sponge or a similar stuit impregnated with ink, the plate being fed with ink from this reserve according to the rate of ink consumption. This shows that the surface of the plate is always covered only with a quantity of ink corresponding to the sucking action of the pores. If by applying and subsequent removing of the stamp a thin ink layer is taken from the surface of the plate, the capillarity i. e. the capillary force of the plate The impregnation of the pads may also be 8 will make appear at the. same spot a new ink.

layer of. equal thickness.. Consequently, the quality of the impressions, prints and marks Will always be of unaltered purity and distinct-ness, too heavy or blotty impressions being barred. Thedurability of such ink pads is practically unlimited, their manufacture is simple, the impregnation does not require much time, there being no danger of the impregnation being too heavy or too slight; the rubber stamps are not subject to wear, the ink consumption is small and its yielding pour great.

The ink pad may outwardly be given, not th shape of a plate, but that of a hollow or massive cylinder, provided. with axial bearings and thus made movable in an adequate manner. This mode of execution presents the advantage that an ink pad of limited size can be advantageously employed for the stamps of any size desired. For inking the stamp, same is moved under slight pressure over the surface of the cylinder of the ink roll. .If the ink roll, which in this case is made to represent the ink pad, is designed as a hollow body, a reserve of ink may be kept available by inserting into the hollow of the cylinder a cotton wool pad, a felt roll or a similar device impregnated with ink.

The drawing shows, by way of example, two embodiments of such pads, Figure l being a section through a plate shaped pad, Figure 2 a pad of the .same type in a receptacle provided with an ink reserve in the form of a piece of felt or the like impregnated with ink' which is placed beneath the pad, whilst Figure 3 shows a cylindrical pad seen in section along the line I-I of Fig. 4 and Fig. 4 a section through the pad along the line II-II of Fig. 3.

The pad according to Fig. 1 consists of a porous plate characterized by the pores passing' through the plate in all directions. The degree of porosity may be dierent, so that the pad will absorb more or less ink. When filled i. e. irnpregnated and saturated with ink this pad is inserted in a receptacle (Fig. 2) in which-under the pad-an ink reserve is kept consisting either of a simple ink tank or of an ink impregnated piece of felt, of cotton wool or the like.

The embodiment according to Figures 3 and 4 refers to a hollow cylinder 5 made of porous ebonite, in the hollow of which the ink may be introduced. This is preferably accomplished in a similar manner as shown in Fig. 3 by inserting a felt cylinder or the like, impregnated with ink. The cylindrical pad is laterally enclosed by means of a cover 7, 7, which is fitted with journals rotatably mounted in the bearings 9 of a standard or frame 10.

If during use the ink of the pads l and 5 is about to be consumed, a fresh supply is provided out of the reserve by means of the capillary effect of the pads, so that the pads if properly seen to will never run dry and will always be ready for use.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare, what I claim is:

1.An ink having the ink distributing member consisting of porous ebonite, with a smooth stamp contacting face.

2. An ink pad having the ink-distributing member consisting of porous ebonite, with a smooth stamp contacting face, an ink receiving area being arranged below and open to the lower surface of the pad.

ALBERT REICH.

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