US 3103879 A
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C. E. CARLSEN MIMEOGRAPH HAND PRINTERS Sept. 17, 1963 Filed s t. 10, 1962 2 Sheets-Sheet l INVENTOR. Carl E. Corlsen ATTORNEY.
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MIMEOGRAPH HAND PRINTERS Filed Sept. 10, 1962 2 Sheets-Sheet 2 INVENTOR. Corl E.Corlsen ATTORNEY O O O O O O O O O O O O O O O O O O O 0 2 oooooo 0000000 0 O O O O O O O O O 0 0 O O O OO O O O O O O O O O l I I i l l l I l o 0120 mw &
United States Patent ,0
4 Claims. (Cl. 101-125 This application is a substitute one for the application filed Mar. 1, 1961, under Ser. No. 92,716, and abandoned, for Mimeograph Hand Printer.
This invention relates to novel improvements in hand stamps for mimeograph printing, the object of which is to make an inexpensive hand stamp which in the performance of work will fully equalize the work done by well known mimeographs.
Thus the present invention embodies all the features for circulating the ink in the stamp, and at the same time forming the basis for a larger stamp, as described in my copending application Ser. No. 72,667, filed November 30, 1960.
In the construction of my invention one piece of suitable material is bent upon itself approximately at the center to form two semi-cylinders adapted to receive an ink pad therebetween.
While this is a distinctive feature of novelty, it may, however be preferable to have said semi-cylinders made in two separate pieces or segments, screws or posts are then used to hold the two parts together and they are arranged so as to accommodate the fastening of the stencil on one side of the stamp.
On the other side a piece of material, or clasp, on the printing semi-cylinder is bent over the edge of the inner semi-cylinder and adapted to hold the two cylinders loosely together. This will at the same time permit the printing cylinder to move freely, as an ink storage pad is expanding and contracting under pressure.
This stamp employs in its construction some radically new features, as it actually uses two semi-cylinders, or sections one of which is perforated; it also uses two pads, one of which is of absorbent material, such as, for instance, felt, and is used for ink storage and placed between the semi-cylinders; the second pad is an ordinary mimeograph ink pad attached to the printing semi-cylinder upon which the actual stencil rests.
This stamp referred to above will be explained in detail hereinafter, as it comprises a new system for storing and distributing the ink, which constitutes the main feature of my invention.
An absorbing pad disposed between the two semi-cylinders or segments is saturated with printing ink and, as pressure is being applied to the handle for printing, the inner form part of the stamp will press upon the ink storage pad and the ink will be squeezed out through the perforations of the printing semi-cylinder and into the printing pad arranged upon the latter from where it flows to the stencil.
This system of applying pressure for ink distribution permits the user to make an innumerable amount of copies with the ink uniformly distributed on the paper,
while the ink or surplus ink will return to the storage ink pad, as will be hereinafter further explained.
v the ink is forced in the same direction, the two ink pads 7 The inner segment of the two semi-cylinders, Whether in one piece or separate, are each re-enforced by a bridge, which may also serve as a handle; or a separate handle may be attached thereto; this re-enforcement will make the inner segment of the stamp sturdy and firm contrary to the outer semi-cylinder which must be flexible and vibratory; thus the outer printing semi-cylinder will have a hinge like springy movement due to the squeezing of the storage pad, as pressure is applied to the handle when rolling the stamp over the paper.
Between the inner and outer segment is a space adapted to receive an ink stonge pad therebetween, while the printing pad is securely attached to the outside of the perforated printing cylinder, and the ink will thus pass freely through it from one pad to the other.
When ink is circulated and distributed under pressure it provides a cleaner stamp because it makes it unnecessary to apply so much ink so it would flow freely by itself.
The pressure on the handle will hasten or slow the flow of ink as the user controls the pressure and adjusts it accordingly; therefore, when a stamp has been newly inked very little pressure is needed for printing, except to make larger quantities of copies, when a greater amount of pressure would be required. However, all the copies would be uniformly inked as the user slowly increases the pressure.
The stamp is used by rolling it towards or away from you, and only once over the paper; as it is then lifted and returned to repeat the operation. The stamp may be used to print on a regular memo pad or any block of paper,
. or even a book, but the best result would be obtained if the stamp is used together with a printing base as shown in connection with this stamp.
This printing base has a right angular guide for the stamp and lines marked to guide the paper and it will assist the user to print straight and will at the same time provide a flexible or electric cushion for the stamp.
If the printing base would be provided with a soft padding, such as for instance rubber, it would facilitate making a print of high quality, similar to that of mimeographing machines, which are using a revolving perforated drum against a rubber roller.
The printing cylinder is made of less width than the inner semi-cylinder.
The two pads are extending outside of the printing semi-cylinder in order to prevent this cylinder from bruising the stencil, and the stencil extends outside of the pads to prevent any ink from getting onto the paper on the sides, but it is about even with the inner stamp. The top of the stencil isnattached to prongs or screws on the inside of the stamp; the stencil is stretched tight over the printing cylinder and is folded over the sharp edge of'the printing cylinder with a crease formed on said stencil so that it may fold over the said cylinder, further both corners are folded to make sure that the stencil will remain attached'. I i
L The two pads extend beyond and completely enclose the sides of the printing semi-cylinder; this is an essential feature to prevent the printing semi-cylinder from damaging the stencil.
As this stamp is always rolled in one direction and should end on the finishing side of the stamp as soon as the actual printing has been done in order to produce a clean stamp.
The empty space next to the storage pad will receive the surplus ink from the printing pad and the open holes in the outer semi-cylinder will permit the surplus ink to pass through said holes and into the open space next to the storage pad, where it will flow into the storage pad and be absorbed as the stamp is being used.
The idea is that the holes will relieve the printing pad from surplus ink and permit it to return to the ink storage pad.
Whatever ink escapes will be absorbed by the absorbent strip forming part of the stencil.
The stencil is also re-enforced at both ends.
In the drawing:
FIGURE 1 is a perspective view of a hand stamp.
FIGURE 2 is a bottom view of the same with parts broken off.
FIGURE 3 is a blank from which the stamp is made.
FIGURE 4 is a view similar to FIGURE 1.
FIGURES 5 and 6 are top plan views showing the respective parts of my device.
FIGURE 7 is a top plan view of a stencil.
FIGURE 8 is a top plan view of a printing base; while FIGURE 9 is a cross sectional view of same.
Referring more particularly to the drawings, the invention consists of a flat piece of material 20, half of which is made with perforations 21, as shown in FIG- URE 3. This piece of material is bent upon itself, as shown at 22 in FIGURE 1 to form two substantially semi-cylinders, the inner cylinder 26 and the outer or printing cylinder 27, adapted to receive an ink storage pad 23 therebetween.
An ordinary mimeograph ink pad 24 is attached to the printing semi-cylinder 27 to which also the actual stencil 25 is secured.
This construction thus comprises a new system for storing and distributing the ink, and constitutes the main features of my invention.
The absorbing ink storage pad 23, arranged between the two semi-cylinders, is saturated with printing ink and, as pressure is being applied to the handle 28 secured to the bridge 29 which is attached to the inner firm part of the stamp 26, the latter will press upon the ink storage pad and the ink will be squeezed out through the perforations 34 of the printing cylinder 27 and into the printing pad 24 arranged upon the latter from where it flows to the stencil. The said bridge may also, if desired be used as a handle.
It may be observed that the inner semi-cylinder, whether in one piece or separate, is re-enforced by the bridge 29; this rte-enforcement will make the inner semi-cylinder of the stamp sturdy and firm contrary to the outer semicylinder, which itself is flexible and vibratory; thus this outer printing semi-cylinder will due to the squeezing of the inner storage pad have a hinge-like springy movement as pressure is applied to the handle when rolling the stamp over the paper.
When the ink is circulated under pressure, it provides for a cleaner stamp, because it makes it unnecessary to apply so much ink as it would flow freely by itself.
The pressure on the handle will hasten or slow the flow of ink as the user controls the pressure and adjusts it accordingly; therefore, when a stamp has been newly inked, very little pressure is needed for printing, except to make larger quantities of copies, when a greater amount of pressure would be required.
The stamp may be used to print on a regular memo pad, or any block of paper or even a book, but the best result would be obtained, if the stamp is used together with a printing base for guidance as shown in FIGURE 8. Thus this base has a right angular guide 30 for the stamp and marked lines 31 to guide the paper and adjust it to various sizes, and it will assist the user to print straight and will at the same time provide a flexible or elastic cushion 32 for the stamp.
The regular mimeograph ink pad 24 is stretched tight over the outside of the printing cylinder and over the actual printing space and is attached in any convenient manner.
The top of the stencil 25 is attached to the prongs or screws 4t} on the inside of the stamp by means of holes 41 in the stencil. The stencil is stretched tight over the printing cylinder and is folded over the sharp edge of the printing cylinder 27, and a crease is put into it to facilitate said folding.
The two pads 23 and 24 shown in FIGURE 2 extend beyond and completely cover the ends of the printing semi-cylinder, as may be seen, in part, in FIGURE 3.
This is an essential feature to prevent the said printing cylinder from damaging the stencil which extends outside the pad; and preventing ink from scilingythe paper to be printed. As the stamp is always rolled in one direction and the ink is forced in the same direction, the two ink pads should terminate on the finishing side of the stamp as soon as the actual printing has been done in order to produce a clean stamp.
The empty space 33 next to the storage pad 23 and the open holes 34 in the outer semi-cylinder will permit the surplus ink to pass through said holes and into the open space 33 next to the storage pad 23, where it will flow into the storage pad and be absorbed as the stamp is being further used.
The idea is that the holes will relieve the printing pad from surplus ink and permit it to return to the storage pad. Whatever ink escapes will be absorbed by the absorbent strip 35 forming part of the stencil.
The stencil is also re-enforced at each end as at 25, 25 on that side that is in contact with the paper to be printed on in order to prevent smudging of said paper.
A modification of my device is shown in FIGURE 4, in which the stamp device comprises two separate semicylinders 26"and 27' detachably secured together by screws or prongs 40' formed on the printing cylinder, while a clasp 41 integral with the printing cylinder 27' is bent over the edge of the inner cylinder 26' which permits the printing cylinder to move freely and press upon the ink pad 23'.
1. A band stamp made of a single piece of material bent upon itself to form an inner and an outer semicylindrieal member, the outer member being a flexible moving printing cylinder formed with perforations and having one end thereof elongated, a handle attached to a bridge and the latter secured to said inner member, an absorbing ink storage pad arranged between the inner and outer member and forming an empty space at one of its ends, .a mimeograph ink pad secured to the outer rnemher, and a stencil arranged upon said mimeograph pad, prongs upon the inner member of the stamp, the stencil having one end mounted on said prongs and the other end stretched over one end of the outer member and folded over a sharp edge of the latter, thereby securing the stenoil to the flexible moving printing cylinder; the ink storage pad being shorter than the two semi-cylindrical members, leaving said empty space therebetween at the finishing side, whereby the surplus ink from the mimeograph pad, when the latter is under pressure and having inked the stencil, will through the perforations in said outer semi-cylinder member return it into the ink storage pad to repeat its circulation; said pads covering the sides of the printing cylinder to prevent it from damaging the stencil, and said stencil being re-enforced at both ends, whereby to prevent the stencil from smudging the paper as the stamp is started and lifted off the paper.
2. In a hand stamp, as claimed in claim 1, and wherein the ink storage pad and the mimeograph ink pad extend beyond and completely cover the sides of the outer 5 member, whereby to prevent said outer member from damaging the stencil and soiling the paper.
3. In a hand stamp, as claimed in claim 1, and wherein the stencil being re-en forced at each end on the side contasting the paper to be printed, whereby to prevent the color of the stencil from smudging the paper as the stamp is started or lifted off the paper.
4. In a hand stamp, as claimed in claim 1, and wherein the stencil at the finishing end is having a strip of paper, whereby to absorb escaping ink.
References Cited in the tile of this patent UNITED STATES PATENTS Hopwood Oct. 13,
Lindsay et al. Mar. 27,
Hidalgo Feb. 6,
Harts J an. 20,
Sto-elting Mar. 26,
FOREIGN PATENTS Fnance Oct. 1,