U.S. patent number 3,802,516 [Application Number 05/318,581] was granted by the patent office on 1974-04-09 for portable marking tool.
This patent grant is currently assigned to M. E. Cunningham Company. Invention is credited to Edwin W. Speicher.
United States Patent |
3,802,516 |
Speicher |
April 9, 1974 |
PORTABLE MARKING TOOL
Abstract
The improved portable marking tool has a head member with an
axial bore therethrough. An anvil extends through the bore and has
an outer end portion with marking devices thereon. An actuator
member connected to a source of fluid under pressure is positioned
in spaced relation to the head member and has a fluid actuated
piston rod assembly movable longitudinally therein. A tubular
connecting member is secured at one end to the head member and at
the other end to the actuator member. Positioned within the tubular
connector member is a striking tool that includes a longitudinally
movable body portion coaxially positioned on a tubular support
member. As the head member is depressed against an object to be
marked, the rearward movement of the head member operably opens a
spool valve to provide flow of fluid under pressure through a
second conduit to the actuator member for actuation of the marking
tool. Unless the marking devices are positioned in the axial bore
of the head member and in abutting relation with the anvil member,
the head member is restrained from moving and thereby opening the
spool valve for actuation of the marking tool.
Inventors: |
Speicher; Edwin W. (Pittsburgh,
PA) |
Assignee: |
M. E. Cunningham Company
(Ingomar, PA)
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Family
ID: |
26912298 |
Appl.
No.: |
05/318,581 |
Filed: |
December 26, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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217823 |
Jan 14, 1972 |
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Current U.S.
Class: |
173/15; 101/3.1;
173/204 |
Current CPC
Class: |
B44B
5/0061 (20130101); B44B 5/0085 (20130101) |
Current International
Class: |
B44B
5/00 (20060101); B25d 009/00 () |
Field of
Search: |
;173/119,120,15
;175/299,300 ;124/13A,11A ;91/419 ;227/7,8 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Purser; Ernest R.
Assistant Examiner: Pate, III; William F.
Attorney, Agent or Firm: Stanley J. Price, Jr. et al.
Parent Case Text
CROSS REFERENCES TO RELATED APPLICATION
This is a continuation-in-part of pending U.S. application, Ser.
No. 217,823, entitled "Portable Marking Tool," which was filed in
the U.S. Pat. Office on Jan. 14, 1972.
Claims
I claim:
1. A striking tool comprising,
a head member having a bore therethrough,
an anvil member movably positioned in said bore,
a hammer member arranged to move toward said anvil member and
strike said anvil member with a marking force,
locking means to lock said hammer member in spaced relation to said
anvil member,
propelling means to propel said hammer member toward said anvil
member,
release means to release said locking means and permit said hammer
member to be propelled by said propelling means toward said anvil
member,
means for maintaining said head member in spaced relation to said
propelling means so that said anvil member remains stationary
within said head member,
an actuator to energize said propelling means, said actuator spaced
from said head member with said hammer member therebetween, and
a connector member connecting said head member to said actuator so
that said anvil member is operable to transfer said marking force
from said hammer to a surface of an object to be marked.
2. A striking tool comprising,
a head member having a bore therethrough,
an anvil member movably positioned in said bore,
means retaining said anvil member in said bore,
a hammer member arranged to move toward said anvil member and
strike said anvil member with a marking force,
locking means to lock said hammer member in spaced relation to said
anvil member,
propelling means to propel said hammer member toward said anvil
member,
release means to release said locking means and permit said hammer
member to be propelled by said propelling means toward said anvil
member,
means for maintaining said head member in spaced relation to said
propelling means so that said anvil member remains stationary
within said head member,
an actuator to energize said propelling means, said actuator spaced
from said head member with said hammer member therebetween,
a valve means in said head member operable to actuate said actuator
so that said propelling means moves longitudinally relative to said
connector member and releases said locking means, and
said valve means arranged in fluid communication with said
actuator.
3. A striking tool as set forth in claim 2 in which,
said head member includes a rear wall,
said propelling means includes a tubular body portion with a front
end portion,
said head member operable to move toward said tubular body portion
upon contact with an object to be marked so that said head member
rear wall moves into abutting relation with said tubular body front
end portion whereby said valve means operably supplies fluid under
pressure to said actuator.
4. A striking tool as set forth in claim 2 in which,
said valve means is operable to shut off the supply of fluid under
pressure to said actuator when said head member is positioned in
spaced relation from an object to be marked.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an improved portable marking tool and
more particularly to a spring propelled marking tool.
2. Description of the Prior Art
U.S. Pat. No. 2,455,270, entitled "Automatic Striking Tool,"
describes a spring actuated marking tool in which the striking
spring is compressed behind the hammer while the hammer is retained
in a locked position by balls within a ball cage portion of a
support member. The anvil or punch is fixed within the support
member. An annular ring member is positioned between a tubular
support member and a tubular outer body. To impress a mark on the
surface of an object, the striking tool is positioned with the end
of the anvil or punch in abutting relation with the surface of the
object to be marked. A force is applied to the end of the outer
body portion that is resisted by the mass of the object to be
marked. The force applied to the body moves the body portion toward
the object to be marked and compresses the striking spring within
the tubular body portion. The body portion after the spring is
compressed a preselected amount moves the annular ring member
toward the object to be marked relative to the fixed support member
and moves the annular recessed portion in underlying relation with
the ball cage of the support member to permit radial displacement
of the balls to release the hammer. The hammer under the
compressive force of the striking spring moves within the support
member and strikes the end of the anvil or punch. The striking
force is transferred through the anvil and marks the object.
With the automatic striking tool disclosed in U.S. Pat. No.
2,455,270 the object to be marked must be either unmovably
positioned on a platform or have sufficient mass to remain
stationary while the compressive force is applied to the striking
spring. This requires either specially designed supports for the
object to be marked or objects of sufficient mass to resist
movement by the force required to compress the striking spring.
There is a need for an improved portable marking tool that is
capable of marking objects without rigidly positioning the object
to be marked on fixed supports and also capable of marking
relatively light objects.
SUMMARY OF THE INVENTION
The hereinafter described invention is directed to an improved
portable marking tool that has a head member with an anvil member
movably positioned therein. A hammer member is arranged to move
toward and away from the anvil member and to strike the anvil
member with a marking force. Locking means are provided to lock the
hammer member in spaced relation to the anvil member. A propelling
means is provided to propel the hammer from the locked rearwardly
spaced position toward the anvil member. A release means is also
provided to release the locking means. An actuator is positioned in
spaced relation to the head member with the hammer member
therebetween. The actuator member is arranged to energize the
propelling means. A connector member is connected at one end to the
head member and at the other end to the actuator member so that the
anvil member in the head member is operable to transfer the
striking force from the hammer member to a surface of the object to
be marked without exerting a substantial force by the marking tool
against the object to be marked.
With the above improved portable marking tool it is now possible to
lightly position or rest the marking end of the anvil in abutting
relation with the object to be marked and propel the hammer by the
actuator within the portable marking tool to impart a striking
force to the anvil and mark the surface of the object.
Accordingly, the principal object of this invention is to provide
an improved portable marking tool that does not require an
immovable support for the object to be marked.
Another object of this invention is to provide an improved portable
marking tool that will impress a mark in a relatively light
object.
A further object of this invention is to provide an improved
portable marking tool that is actuated to impress a mark on an
object upon contact of the marking tool against the surface of the
object to be marked.
Moreover an additional safety feature of the improved portable
marking tool protects against ejection of the anvil member out of
the marking tool by cutting off the supply of fluid to the actuator
member when the marking devices are not positioned for operation
within the head member and in abutting relation with the anvil
member.
These and other objects of this invention will be more completely
disclosed and described in the following specification, the
accompanying drawings and the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view in side elevation and section of my improved
portable marking tool, illustrating the hammer in a retracted and
locked position.
FIG. 2 is a view similar to FIG. 1, illustrating the hammer as it
strikes the anvil.
FIG. 3 is a view in section taken along the line III--III of FIG.
2, illustrating a plurality of markers supported on the end of the
anvil.
FIG. 4 is a view in an end elevation of the improved portable
marking tool with a plurality of marking elements positioned in the
head portion.
FIG. 5 is a fragmentary view in side elevation and section of
another embodiment of the improved portable marking tool,
illustrating the spool valve arrangement for supplying fluid under
pressure required to actuate the portable marking tool.
FIG. 6 is a view in end section taken along the line VI--VI of FIG.
5, illustrating the plurality of pressure pins extending forwardly
of the cap member.
FIG. 7 is a view in section taken along the line VII--VII of FIG. 6
illustrating one of the plurality of pressure pins supported by a
spring in the cap member.
FIG. 8 is a view similar to FIG. 5, illustrating the head portion
in position to permit flow of fluid through the spool valve.
FIG. 9 is another view similar to FIG. 5, illustrating the head
portion in locked position to prevent the flow of fluid through the
spool valve.
FIG. 10 is a fragmented sectional view of the spool valve for
supplying fluid to the actuator member according to my
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings and particularly FIGS. 1 and 2 there is
illustrated my improved portable marking tool generally designated
by the numeral 10. The marking tool 10 includes a head portion
generally designated by the numeral 12 and an actuator generally
designated by the numeral 14 positioned in spaced relation to each
other and connected to each other by means of a tubular connecting
member 16. A striking tool generally designated by the numeral 18
is positioned within the tubular connecting member 16 and is
arranged to provide the striking force for the anvil 20.
Referring in greater detail to the components, the head member 12
has an axial bore 22 therethrough with a first enlarged threaded
portion 24, a second enlarged threaded end portion 26 and an end
shoulder 28 therebetween. The head portion 12 has a transverse
slotted portion 30 that intersects the bore 22 and is arranged to
house a chase 34. Within the chase 34 there are a plurality of
marker elements 36 secured therein by means of a transverse pin 38.
The anvil 20 has an enlarged rectangular head portion 40 arranged
to abut the marker elements 36 and apply a striking force thereto
as later explained.
The tubular connecting member 16 has a threaded end portion that is
secured in the threaded bore 26 of head member 12 to rigidly secure
the head member 12 to the tubular connecting member 16.
The actuator 14 has a cup shaped cylinder end portion 42 with a
threaded opening 44 in the base portion. The open end portion of
the cylinder 42 is threadedly secured to a cylindrical block member
46 that, in turn, has an axial bore 48 therethrough with an
enlarged threaded portion 50. The end of the tubular connecting
member 16 is threadedly secured in the enlarged bore 50 of actuator
14. Within the cylinder 42 there is positioned a piston 52 with a
rod 54 extending therefrom through the bore 48 in the cylindrical
block member 46. A spring 56 is positioned around the rod 54 and is
arranged to urge the piston toward a retracted position as is
illustrated in FIG. 1. Connected to opening 44 is a nipple 58 of a
three-way sleeve valve 60. A spring 62 is provided to maintain the
sleeve valve in a closed position. The other end of sleeve valve 60
is connected by a flexible conduit 64 to a suitable source of fluid
under pressure. With this arrangement, movement of the sleeve valve
60 toward the actuator 14 compresses the spring 62 and opens the
valve to supply fluid under pressure into the cylinder 42. Rearward
movement of the sleeve will release the fluid pressure from within
the cylinder and further rearward movement will maintain the sleeve
valve 60 closed.
Within the tubular connecting member 16 there is provided a
striking tool similar in many respects to the striking tool
disclosed in U.S. Pat. No. 2,455,270. The striking tool 18 includes
a tubular body portion 66 that is supported in spaced relation to
the inner walls of the tubular connecting member by means of
annular guides 68 and 70. The guides are suitably secured to the
tubular body portion 66 and are movable therewith. A nut 72 is
threadedly secured to the end of tubular body portion 66 adjacent
the head member 12. The nut has an axial portion 74 through which a
supporting member 76 extends into the inner portion of the striking
tool body portion 66. The supporting member 76 has a threaded end
portion 78 that is secured in the threaded bore 24 of head portion
12. With this arrangement the supporting member 76 remains fixed
within the tubular connecting member 16 and the striking tool body
portion 66 is arranged to move longitudinally over the surface of
the supporting member 76.
The supporting member 76 has a plurality of spaced apertures 80 in
the periphery thereof forming a circular ball cage in which balls
82 are positioned. An annular ring member 84 is positioned between
the outer surface of supporting member 76 and the inner surface of
tubular body portion 66. The annular ring has a plurality of ball
receiving recesses 86 therein arranged to receive a portion of the
balls 82 when the annular ring 84 is moved toward the head member
12 by the inner extending annular shoulder 88 of tubular body
portion 66 abutting the annular end portion 90 of ring 84 and
moving ring 84 toward the head portion 12. A return spring 92 is
arranged to return the annular ring 84 to the position illustrated
in FIG. 1 where a shoulder portion of ring 84 abuts the outwardly
extending end shoulder 94 of supporting member 76.
A hammer 96 is positioned within the tubular body portion 66 and
extends into the supporting member 76. The hammer has a striking
end portion 98 and an annular recessed intermediate portion 100 in
which the balls 82 extend to lock the hammer 96 in a rear or
retracted position. The hammer 96 has an enlarged head portion 102
that abuts inturned shoulder portion 106 of the tubular body
portion 66 and a striking spring 108 abuts the hammer enlarged head
portion 102 and the rear wall 110 of tubular body portion 66. A
return spring 112 is arranged to move the tubular body portion 66
to the position illustrated in FIG. 1. The spring 112 abuts the
outer turned shoulder 94 of supporting member 76 and the inturned
shoulder 106 of tubular body portion 66. As the tubular body
portion 66 moves toward the head member 12 the spring 112 is
compressed and returns the body portion 66 to the position
illustrated in FIG. 1.
The portable marking tool operates in the following manner. The
sleeve valve 60 is moved forward against the spring 62 and admits
fluid under pressure into the cylinder 42 to move the piston 52 and
rod 54 axially as illustrated in FIG. 2 and compresses the spring
56. The rod 54 abuts the end portion 110 of the striking tool body
portion 66 and moves the striking tool body portion 66 axially
toward the head portion 12. The hammer 96 is locked in the position
illustrated in FIG. 1 relative to the supporting member 76 and the
balls 82 in ball cage 80 extend into the recessed portion 100 of
hammer 96. The forward movement of the body portion 66 compresses
the striking spring 108 and exerts a force against the enlarged
head portion 102 of hammer 96. Further movement of the striking
tool body portion 66 moves the body portion inturned shoulder 88
into contact with the end portion 90 of the annular ring member 84
and moves the ring member 84 therewith until the detent or recessed
portions 86 are in underlying relation with the ball cage 80 of
support member 76. When the recessed portions 86 of annular ring 84
are aligned the balls 82 move radially outwardly from the annular
recessed portion 100 in the hammer 96 to release the hammer 96 from
its retracted locked position. The hammer 96 is then propelled
toward the head portion 12 and strikes the anvil 20 and transmits a
marking force to the anvil 20. The parts are so dimensioned that
the front face 114 of nut 72 abuts the inner shoulder 28 of head
portion 12 as the hammer 96 is released from its rearward locked
position as is illustrated in FIG. 2. It is believed that the
abutting relation of the striking tool body portion 66 with the
head portion 12 as the hammer 96 is released and propelled forward
provides a structure that transmits the striking force of the
hammer 96 through the anvil 20 and markers 36 to the object to be
marked and has the desired velocity and force to impress a mark on
the object without requiring the object to be positioned in a fixed
support or having a mass sufficient to oppose the marking force of
the anvil 20. With this arrangement it is now possible to mark
objects by simply positioning the tool in abutting relation with
the surface of the object to be marked and exerting little, if any,
force on the marking tool to oppose the striking force of the
portable marking tool. It is also possible with the above described
portable marking tool to impress identification, grade and other
indicia in the surface of metallic objects fabricated from
aluminum, copper, steel and various alloys thereof without rigidly
supporting the objects. Relatively thin sheets fabricated from the
above metals may also be suitably marked by this process.
Referring to FIG. 5 of the drawings, another embodiment of my
invention is illustrated in which similar parts are designated by
similar numerals. The head portion 12 includes a rearwardly
extending slotted portion 116 having a plurality of slots 118
formed therein. The head portion 12 is slidably secured to the
tubular connecting member 16 by means of the cap screws 120
positioned within the plurality of slots 118 and threadedly engaged
to a cap member 122. The cap member 122 is threadably secured to
the threaded end portion 78 of the supporting member 76 adjacent
the head member 12. The cap has an axial bore 124 through which the
supporting member 76 extends. A cap member shoulder portion 126 is
retained in abutting contact with the end of the connecting member
16 and the slotted portion 116 by the cap screws 120 threadedly
connected to member 16 and cap 122. With this arrangement, cap
member 122 remains fixed within the marking tool 10 between the
support member 76 and the connecting member 16. The set screw 128
threadably engages the head portion 12 to the chase 34 to provide
for installation and removal of the chase 34 in the forward end of
the marking tool 10.
In the embodiment of the invention illustrated in the FIGS. 5 to
10, fluid under pressure is initially supplied to a fluid inlet
conduit 130, which is suitably connected to a fluid reservoir (not
shown). In the first embodiment of my invention described
hereinabove, fluid under pressure is supplied directly from a
reservoir through the conduit 64 to the sleeve valve 60; however,
in the second embodiment of the invention the fluid under pressure
is directed from the reservoir to the inlet conduit 130 before it
enters the conduit 64 and sleeve valve 60.
The fluid inlet conduit 130 extends longitudinally above the
marking device 10 and is threadably secured to one end of the inlet
elbow joint 132 by nut 134. A nozzle 136 extending from the inlet
elbow joint 132 other end is threadably secured within the head
portion 12 and arranged in fluid communication with a transverse
inlet passageway 137 in the head portion 12. The inlet passageway
137 intersects bore 138 within which a spool valve 140 is retained
in the head portion 12 by the set screw 142.
The spool valve 140 is of conventional design, as illustrated in
FIG. 10, and includes a valve stem 144 connected at both ends to
valve member 146 and valve member 148. The transverse inlet
passageway 137 joins in fluid communication the inlet chamber 150
with the inlet conduit 130. The inlet chamber 150 extends
rearwardly to meet the outlet chamber 152, which also joins in
fluid communication at the other end thereof with the exhaust
chamber 154. The outlet chamber 152 intersects the transverse
outlet passageway 156 within the head portion 12. The outlet
passageway 156 joins in fluid communication the chamber 152 with
the outlet nozzle 158. The outlet nozzle 158 connects to an outlet
elbow joint positioned in an outlet conduit (both not shown) for
supplying fluid under pressure from the spool valve 140 to the
cylinder 42 of the actuator 14 positioned in the rear portion of
the marking tool 10. The outlet conduit is arranged in spaced
parallel relation to the inlet conduit 130 and extends
longitudinally above the surface of the marking tool 10.
A pin 160 projecting forwardly of the cap front face 164 is rigidly
secured within the bore 162 adjacent the valve member 148. With
this arrangement, the head portion 12 moves rearwardly toward the
cap front face 164 as the force exerted against the chase 34 is
transmitted to the head portion 12. As the head portion 12 moves
rearwardly, it contacts a plurality of pressure pins 166 arranged
for longitudinal movement within bores 168 extending rearwardly
from the front face 164 to within the body of cap 122, as
illustrated in FIGS. 6 and 7.
Referring to FIG. 7, the pin 166 extends from the front face 164
and abuts the spring 170 which is retained in the bore 168 between
the pin 166 and the set screw 172. Thus, the rearward movement of
the head portion 12 against the pressure pin 166 compresses the
spring 170 and moves the pin 166 within bore 168 to provide for
contact of the valve member 148 with the pin 160. Contact of the
valve member 148 with the pin 160 opens the valve 140 by displacing
the shoulder portion 174 of valve member 146 from fluid tight
engagement with the inlet chamber 150. The fluid under pressure
contained within the inlet passageway 137 then enters the valve
chamber 150 and passes therethrough to the outlet chamber 152. The
outlet chamber 152 is sealed from the exhaust chamber 154 by the
fluid tight engagement of the shoulder portion 175 of valve member
148. The fluid is then free to pass from the from the outlet
chamber 152 through the outlet passageway 156 to the outlet conduit
for supplying the fluid to the cylinder 42 in the rear of marking
tool 10.
The spool valve member 148 must be moved forwardly so that the
inlet chamber 150 is opened to permit passage of the fluid through
the spool valve 140 to the chamber 42. Accordingly, the chase 34
must abut the object to be marked so that the head portion 12 is
moved rearwardly to open the spool valve 140.
Without the chase 34 inserted in position within the head portion
12, the anvil 20 would be ejected from the support member 76 when
the marking tool 10 is actuated; therefore, the spool valve 140 is
kept in closed position to prevent actuation of the tool 10 when
the chase 34 is not in place within the head portion 12. The head
portion 12 has a longitudinal bore 176 in which a pin 178 is
positioned. When the chase 34 is in place within the head portion
12, as illustrated in FIG. 8, the chase 34 moves the pin 178
rearwardly to compress a spring 180 secured at one end to the pin
178 and at the other end within the conical bore 182 of the cap
member 122. Rearward movement of the pin 178 also moves the
peripheral recessed portion 184 of pin 178 from overlying relation
with the arcuate tip of pin 186. Pin 186 has a laterally extending
arm 188 thereon and is supported by a compression spring 190
secured to the screw 192 threadably engaged within the bore 194.
When the pin 186 is depressed by the cylindrical body portion of
pin 178 the laterally extending arm 188 of pin 186 is below the
shoulder 196 on the cap front face 164. When the arm 188 is
positioned below the shoulder 196, the head portion 12 can be moved
rearwardly to open the spool valve 140 and provide for the flow of
fluid to the cylinder 42 of the actuator 14.
When the chase 34 is not in position within the head portion 12, as
illustrated in FIG. 9, the pin 178 moves forwardly to permit the
arcuate tip of pin 186 to move upwardly in the recessed portion
184. With this arrangement, the laterally extending arm 188 abuts
the cap member face 164 thereby preventing rearward movement of the
head portion 12 to open the spool valve 140 in the manner
hereinabove described.
Referring to FIGS. 5, 8 and 9, there is illustrated a coil spring
198 arranged to return the tubular body portion 66 to the position
illustrated in FIG. 1 for recocking of the marking tool 10. The
spring 198 abuts at one end the annular nylon guide 200 within the
recess 202 formed between the nut 72 and the connecting member 16
and at the other end the cap rear face 204. The annular nylon guide
200 is movable longitudinally with the tubular body portion 66 and
is maintained in abutting relationship with the nut 72 threadably
secured to tubular member 66. As the tubular body portion 66 moves
toward the head member 12, the spring 198 is compressed. After
actuation of the marking tool 10 the spring 198 urges tubular body
portion 66 rearwardly to permit recocking of the marking tool
10.
The second embodiment of the invention, hereinabove described,
assures actuation of the marking tool 10 only when the marker
elements secured within the chase 34 are depressed against the
object to be marked. Thus, the marking tool 10 will not discharge
when the marking elements are not depressed against the object. In
addition, the anvil 20 is prevented from being ejected as a
projectile from the tubular body portion 66 when the chase 34 is
not retained in place within the head portion 12. The engagement of
pin 178 with pin 186 locks the head portion 12 in place to thereby
block rearward movement thereof, which would otherwise open the
spool valve 140 and actuate the marking tool 10. Even though the
marking elements must be depressed against an object before the
tool 10 is actuated, a substantial force is not required to be
applied to the marking elements to move the head portion 12
rearwardly. As with the first embodiment, hereinabove described,
only a relatively light force is required to be exerted on the
marking tool 10 for actuation thereof.
The operation of the above described second embodiment of the
portable marking tool to impress a mark of identification in the
surface of an object, with the addition of the actuation features,
is similar to the operation of the first embodiment. In the second
embodiment, however, the front face 114 of the nut 72 abuts the
rear face 204 of the cap member 122 as the hammer 96 is released
from its rearward locked position. An annular ring 206 of resilient
material retained in annulus 208 on the front face 114 of nut 72
surrounds in overlying relation the support member 72 and provides
for absorption of shock forces applied to tubular body portion 66
upon impact of the nut 72 with the cap member 122. The abutting
relation of the cap rear face 204 with the nut front face 114 and
the cap front face 164 with inner shoulder 28 of the head portion
12, as the hammer 96 is released, transmits the striking force of
the hammer 96 through the anvil 20 and the marking elements.
Similarly, as with the first embodiment, the object to be marked is
not required to be positioned in a fixed support as the striking
force of the hammer 96 is transmitted to the markers in the second
described embodiment of my invention.
It should be understood throughout the specification that the
designation of the apparatus as a portable marking tool is intended
to include any types of impressions applied to the surface of
various objects and it is not intended to limit this apparatus to
the use as an indicia marking tool.
According to the provisions of the patent statutes, I have
explained the principle, preferred construction and mode of
operation of my invention and have illustrated and described what I
now consider to represent its best embodiments.
* * * * *