US 3680968 A
A method of correcting a typewritten impression comprising the steps of centering an applicator containing a correction liquid and having a liquid outlet and a valve head extending through the liquid outlet for controlling flow of correction liquid through the liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression. Therefore, said correction liquid is ejected from said applicator to form a disc of correction liquid having a ring of greatest thickness adjacent the periphery of said disc and surrounding the impression to be corrected, and then allowing said disc of correction liquid to dry.
Description (OCR text may contain errors)
United States Patent Schwartzman et a].
[ 1 Aug. 1,1972
 METHOD OF CORRECTING ,TYPEWRITTEN IMPRESSIONS  Filed: Feb. 24, 1970 v  Appl.No.: 13,303
 US. Cl. ..401/260, 401/206, 401/292  Int. Cl. ..B43k 5/06  Field of Search ..401/258-260, 206
 References Cited UNITED STATES PATENTS 2,714,475 8/1955 Roehrich ..401/260 X 3,378,330 4/1968 Schwartzman ..401/260 3,468,611 9/1969 Ward ..,....401/260 X FOREIGN PATENTS OR APPLICATIONS 1,519,601 2/1968 France ..401/292 538,909 6/1955 Belgium ..401/260 Primary Examiner-Lawrence Charles Attorney-Kenneth S. Goldfarb 5 7] ABSTRACT A method of correcting atypewritten impression comprising the steps of centering an applicator containing a correction liquid and having a liquid outlet and a valve head extending through the liquid outlet for controlling flow of correction liquid through the liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression. Therefore, said correction liquid is ejected from said applicator to form a disc of correction liquid having a ring of greatest thickness adjacent the periphery of said disc and surrounding the impression to be corrected, and then allowing said disc of correction liquid to dry.
2 Claims, 7 Drawing Figures METHOD OF CORRECTING TYPEWRI'ITEN IMPRESSIONS it is to be used, and which also contains a thixotropic agent. The present invention makes use of applicators such as that disclosed in the U.S. Pat. No. 3,379,490, issued Apr. 23, 1968 and U.S. Pat. No. 3,378,330, issued Apr. 16, 1968, both to Gilbert Schwartzman for applying correction liquid in a particular manner whereby an especially neat application of correction liquid is made possible and which tends to eliminate bleeding of the pigment of the impression being corrected through the correction liquid while also providing for a highly effective base on which a corrected typewritten character can be applied.
The concept of this invention features a method of correcting a typewritten impression by ejecting correction liquid from an applicator to form a disc of correction liquid on a substrate material having a ring of greatest thickness adjacent the periphery of the disc and surrounding the impression to be corrected. This is achievable by the use of a correction liquid having a thixotropic agent so that pulsating pumping action and subsequent stirring of the ejected liquid by the valve head of the applicator will both thin the correction liquid at the center of the disc and aid in forming the ring of fluid.
Still further objects and features of this invention reside in a method and apparatus for correcting typewritten impressions which provides a container which is capable of being easily grasped in a manner such as a pen or pencil is handled, which provides a secure finger hold for the user and a shield against accidental contact of the fingers of the user with the correction liquid being ejected from the apparatus, and which is simple and easy to use, and effective in operation.
These, together with the various ancillary objects and features of this invention, which will become more apparent as the following description proceeds, are attained by this method of correcting a typewritten impression, a preferred embodiment of which is illustrated in the accompanying drawing, by way of example only, wherein:
FIG. 1 is an exploded vertical sectional view of the apparatus for correcting a typewritten impression in accordance with the concepts of the present invention;
FIG. 2 is a partial view similar to FIG. 1 but showing the device in an assembled state;
FIG. 3 is a perspective view illustrating the manner in which the device is used for correcting an erroneously typed impression;
FIG. 4 is an enlarged vertical sectional view showing the apparatus in use;
FIG. 5 is a sectional view through a sheet of substrate material having typewritten impressions thereon after they have been corrected;
FIG. 6 is an enlarged sectional detailview illustrating the corrected typewritten impression; and,
FIG. 7 is a top plan view illustrating the corrected typewritten-impression.
With continuing reference to the accompanying drawing, wherein like reference numerals designate similar parts throughout the various views, reference numeral 10 generally designatesthe applicator comprising the apparatus of the present invention. This applicator includes a container 12 and a retaining ring 14. The retaining ring 14 includes a body or projecting portion 15 adapted to fit into the neck 16 of the container l2, the neck being crimped about the projecting portion 15 and the projecting portion 15 being force fitted in the neck so as to provide a secure fit. The retaining ring further includes a peripheral flange 17 which is adapted to engage the mouth 18 of the neck 16 and the retaining ring 14 further includes an outwardly tapered substantially conical neck portion 19 terminating in an applicator face 20 provided with a liquid outlet or opening 22 therein and defining a valve seat. The flange 17 forms a finger rest and protective shield. A valve assembly 24 is provided, which includes a valve head 26 having a tapered conical portion 28 terminating in a hemispherical tip 30. Integral with the valve head 26 are aplurality of helical springs 32 which are also integral with a mounting ring or base 34 held in place by the lower end 36 of the projecting portion 15 being swaged so that the springs 32 are continuously under compression normally urging the valve head portion 26 into frictional engagement with the valve seat so as to prevent fluid flow.
The container 12 is filled with a correction liquid 38 having a thixotropic agent therein so that pulsating pumping action and the resultant stirring of the ejected correction liquid will cause it to thin in the center and form a peripheral ring. As shown in FIG. 3, should there be an incorrect typewritten impression such as the letter D as indicated at 40, the applicator is centered over the typewritten impression 40 which is on a suitable substrate material such as paper 42. This is done by placing the hemispherical tip 30 centrally over the letter D. Thereafter, the correction liquid 38 is ejected by pulsating upward and downward pumping motion using the rigid container 12 which may be grasped much in the same manner as a pen or pencil. The flange 17 will prevent accidental contact of the users fingers with correction liquid. This will cause the ejection of the liquid and because of the thixotropic nature of the liquid, the center of the disc of fluid that will be ejected through the opening 22 will become thin and form a depression 44 in the disc-like coating 46 of correction liquid with a ring 48 of greater thickness being at the periphery of the disc of correction liquid. This is highly desirable for several reasons. The provision of a ring of correction liquid around the periphery of the disc of correction material will normally prevent bleeding of the inked character 40 through the correction material. Further, the thickened ring will prevent accidental disintegration at the edges of the correction allowing portions of the incorrect character to show. After the correction material has been allowed to dry, the ring portion 48 will provide a better fit for a new typewritten impression than is possible from a flat coatmg.
A latitude of modification, substitution and change is intended in the foregoing disclosure and in some instances, some features of the invention will be employed without a corresponding use of other features.
1.v Amethod of vcorrecting a typewritten impression on a substrate material, comprising the steps of centering anapplicator containing a correction liquid and having a liquid outlet and a valve head extending through said liquid outlet for controlling flow of correction liquid through said liquid outlet in overlying relationship relative to a typed impression with said valve head engaging substantially the center of said typewritten impression and with said liquid outlet spaced from the substrate material, thereafter ejecting said correction liquid from said applicator and forcing said valve head against said typewritten impression in a pulsating manner to form a disc of correction liquid on said substrate material having a ring of greatest thickness adjacent the periphery of said disc and surrounding theimpression to be corrected, and then allowing said disc of correction liquid to dry.
7 2. A method according to claim 1, wherein said correction liquid contains a thixotropic agent so that pulsating of said valve head will form said ring.