U.S. patent number 3,680,968 [Application Number 05/013,303] was granted by the patent office on 1972-08-01 for method of correcting typewritten impressions.
Invention is credited to Robert Glenn, Gilbert Schwartzman.
United States Patent |
3,680,968 |
Schwartzman , et
al. |
August 1, 1972 |
METHOD OF CORRECTING TYPEWRITTEN IMPRESSIONS
Abstract
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.
Inventors: |
Schwartzman; Gilbert
(Scarsdale, NY), Glenn; Robert (Flushing, NY) |
Family
ID: |
27431521 |
Appl.
No.: |
05/013,303 |
Filed: |
February 24, 1970 |
Current U.S.
Class: |
401/260; D19/185;
401/206; 401/292 |
Current CPC
Class: |
B43L
19/0018 (20130101); B43K 5/1845 (20130101) |
Current International
Class: |
B43K
5/00 (20060101); B43K 5/18 (20060101); B43L
19/00 (20060101); B43k 005/06 () |
Field of
Search: |
;401/258-260,206 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,519,601 |
|
Feb 1968 |
|
FR |
|
538,909 |
|
Jun 1955 |
|
BE |
|
Primary Examiner: Charles; Lawrence
Claims
We claim:
1. A method of correcting a typewritten impression on a substrate
material, comprising the steps of centering an applicator
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 the impression to be
corrected, and then allowing said disc of correction liquid to
dry.
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.
Description
This invention relates to a method of correcting typewritten and
other impressions, and more particularly to a method of applying a
correction liquid for conveniently visually eliminating uncorrected
or unwanted letters, numbers, or the like impressions from various
documents.
In the co-pending application of Sylvester Giaccone et al., Ser.
No. 10,017 filed Feb. 9, 1970 for Correction Fluid there is
disclosed a correction liquid especially designed to blend with the
substrate material on which 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 detail view 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 designates the 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 12, 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 a plurality 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 user's 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 coating.
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.
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