U.S. patent number 3,816,207 [Application Number 05/279,477] was granted by the patent office on 1974-06-11 for method and apparatus for hot stamping cylindrical articles.
This patent grant is currently assigned to Ethyl Corporation. Invention is credited to William G. Kinslow, Jr., Wayne G. Ritter, Jr., Elmer L. Robertson.
United States Patent |
3,816,207 |
Robertson , et al. |
June 11, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
METHOD AND APPARATUS FOR HOT STAMPING CYLINDRICAL ARTICLES
Abstract
A method and apparatus for hot stamping or heat transferring an
image to a cylindrical object. A cylindrical object, such as a
hollow plastic bottle, is rotatably mounted on a support platform
which is horizontally movable. A horizontally movable die is
mounted on a frame above the bottle-holding platform. A strip of
movable decorating tape is interposed between the cylindrical
article and the die. Means are provided for applying fluid pressure
to the interior of the bottle to rigidify the bottle during the
printing step. The die moves across the decorating tape pressing
the tape onto the surface of the bottle and rotating the bottle as
the die moves over the tape. Gripping means are provided for
gripping the tape and pulling the tape forward at the same rate of
movement as the die.
Inventors: |
Robertson; Elmer L. (Overland
Park, KS), Ritter, Jr.; Wayne G. (Freeman, MO), Kinslow,
Jr.; William G. (Kansas City, MO) |
Assignee: |
Ethyl Corporation (Kansas City,
MO)
|
Family
ID: |
23069140 |
Appl.
No.: |
05/279,477 |
Filed: |
August 10, 1972 |
Current U.S.
Class: |
156/238; 101/7;
156/542; 101/9 |
Current CPC
Class: |
B41F
17/14 (20130101); B41F 19/06 (20130101); B41P
2219/43 (20130101); B41P 2217/62 (20130101); Y10T
156/171 (20150115) |
Current International
Class: |
B41F
17/14 (20060101); B41F 17/08 (20060101); B41F
19/00 (20060101); B41F 19/06 (20060101); B44c
001/14 () |
Field of
Search: |
;101/7,8,9-11,38,38A
;156/233,234,238,540,542,552,240 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pulfrey; Robert E.
Assistant Examiner: Crowder; Clifford D.
Attorney, Agent or Firm: Johnson; Donald L. Sieberth; John
F. Mays; E. Donald
Claims
What is claimed is:
1. In an apparatus for decorating a cylindrical article, the
combination comprising:
a. a base for supporting said apparatus;
b. a generally rectangular, open frame mounted on said base;
c. a vertically movable, article holder platform mounted on said
base within said frame;
d. a horizontally movable die holder mounted on said frame above
said article holder platform;
e. a die mounted on said die holder;
f. a strip of movable decorating tape extending between said
article holder platform and said die;
g. means to vertically move said article holder platform;
h. means to horizontally move said die holder and said die into
engagement with said tape and said cylindrical article carried by
said article holder platform; and
i. tape gripping means attached directly to and supported solely
from said die holder and adapted to fixedly grip said tape to move
said tape at the same horizontal rate as said die holder and said
die.
2. In the apparatus of claim 1 wherein said tape-gripping means
includes a fluid actuated power source, a pivotable arm attached to
said power source, a tapegripping bar attached to said arm, and a
support bar adapted to make contact with said tape-gripping bar to
grip said tape therebetween.
3. In the apparatus of claim 1 including tape take-up means and
wherein said tape take-up means includes continuously energized
tape windup means and intermittently operable tape-holding
means.
4. In the apparatus of claim 3 wherein said tape-holding means
includes a fluid power source, a pivotable arm attached to said
power source, a tape-locking bar attached to said arm, and a
backing bar adapted to make contact with said tape-locking bar to
grip said tape therebetween.
5. In the apparatus of claim 3 wherein said tape windup means
includes a continuously energized power means.
6. In the apparatus of claim 1 including means spaced from the face
of said die for heating the face of said die by radiant heat when
said die is in the retracted position.
7. In the apparatus of claim 6 wherein said means for heating the
face of said die includes a radiant heater plate fixedly attached
to said frame.
8. In the apparatus of claim 7 wherein said radiant heater plate
has attached to its outer end a position roller positioned adjacent
said cylindrical article when said article holder platform is in
its uppermost position.
9. In the apparatus of claim 1 wherein said article holder platform
includes article holding means for rotatably holding said article
for decorating, said article holding means providing adjusting
means for changing the width and height of said article holding
means to accommodate cylindrical articles having different lengths
and diameters.
10. In the apparatus of claim 1 wherein said die holder has
attached to its underside a cooling plate, which has said die
attached to its underside.
11. In a method for applying decoration to a cylindrical article,
the steps comprising:
a. positioning said article for rotation about its longitudinal
axis;
b. moving said article vertically into engagement with a strip of
decorating material;
c. horizontally moving a die platform assembly including a heated
die in a plane perpendicular to said longitudinal axis of said
article to engage said strip of decorating material and to press
said decorating material against said cylindrical article;
d. rotating said bottle on its longitudinal axis solely by
frictional contact between said bottle, said tape and said die;
e. advancing said strip of decorating material in the direction of
movement of said die at the same rate as said die by positively
gripping said strip with gripping means attached directly to and
supported solely by said die platform assembly; and
f. causing the face of said die to be exposed to a source of
radiant heat external of said die and spaced from said die face.
Description
BACKGROUND OF THE INVENTION
Cylindrical articles, such as hollow, flexible wall plastic
bottles, have been decorated using hot stamping techniques for some
time. One method and apparatus for hot stamping either cylindrical
or non-cylindrical, e.g., oval, plastic bottles is shown in U.S.
Pat. No. 2,751,701. The method and apparatus disclosed in the
foregoing patent requires that the bottle be placed within a die
support holder which substantially surrounds the bottle. A
heat-transferable foil is interposed between the heated die in the
die holder and the bottle surface. Air pressure is applied to the
interior of the bottle to rigidify the walls of the bottle and
effect the transfer of the indicia to the bottle wall. While the
machine and method disclosed in the foregoing patent have found
wide acceptance and are commercially used, the technique requires a
rather elaborate and expensive machine and suffers the disadvantage
that circumferential printing over the entire surface of
cylindrical bottles is generally not feasible.
One apparatus for decorating the surface of cylindrical articles
wherein the article is rolled between a heated die with an
indicia-transferring tape interposed therebetween is shown in U.S.
Pat. No. 3,309,256. However, the apparatus disclosd in this patent
depends upon frictional contact among the die, the tape and the
wall of the container to maintain the position of the tape as the
bottle is rotated. Oftentimes, apparatuses of this type permit the
tape to slip between the bottle and the die, thus resulting in
smearing or distortion of the indicia as it is transferred to the
bottle.
Another type of apparatus for transferring hot stamping indicia to
the surface of cylindrical bottles is shown in U.S. Pat. No.
3,608,480. This apparatus requires that the bottles be conveyed on
a roller chain underneath a hot stamp die, thus resulting in
distortion of the surface of the article and making it difficult to
achieve a clean, accurate transfer of the impression from the die
to the bottle.
Another type of apparatus utilized for hot stamping plastic
articles which are oval or generally rectangular in shape is shown
in U.S. Pat. No. 3,657,053. This apparatus has an elevatable
platform to hold the rectangular bottle and press it against a die
with an indicia-transferring foil interposed between the surface of
the bottle and the die. The bottle holder is adapted primarily for
non-cylindrical bottles and thus is not believed capable of hot
stamping by peripheral rolling cylindrical articles such as hollow
plastic bottles.
Thus, it is seen that the hot stamping art is in need of a method
and apparatus which will permit hot stamping of cylindrical
articles such as hollow plastic bottles wherein the indicia
transfer tape or hot stamp foil can be securely positioned between
the bottle and the hot stamp die and moved at exactly the same rate
that the die progresses across the surface of the bottle, thereby
permitting accurate and truthful transfer of the indicia on the hot
die face to the bottle surface. The apparatus of the present
invention provides a positive control for the movement of the foil
coordinated with the rotation of the hollow, cylindrical, plastic
container across the surface of the die.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a hot stampihg
apparatus and method which can faithfully reproduce the indicia on
a hot stamp die on the entire circumferential surface of a hollow
cylindrical container.
It is another object of the present invention to provide a hot
stamping apparatus and method which utilize an apparatus of
substantially simple and economical construction.
An additional object of the present invention is to provide a
method and apparatus for hot stamping cylindrical articles which
can be readily changed to accommodate various sized cylindrical
articles.
A further object of the present invention is to provide an
apparatus and method for hot stamping cylindrical articles which
can provide continuous positive contact among the hot stamp die,
the transfer foil and the bottle wall throughout the revolution of
the cylindrical bottle.
These and other objects of the invention are provided for in the
apparatus aspects in an apparatus for decorating cylindrical
articles which includes a base for supporting the apparatus. A
generally rectangular open frame is mounted on the base. A
vertically movable article holder platform is mounted on the base
within the frame. A horizontally movable die holder is mounted on
the frame above the article holder platform. A die is mounted on
the die holder. A strip of movable decorating tape extends between
the article holder platform and the die. Means to vertically move
the article holder platform are provided. Means are provided to
horizontally move the die holder and the die into engagement with
the decoratng tape and the article carried by the article holder
platform. Means to move the tape coordinated with the movement of
the die and the die holder are provided.
The method aspects of the present invention are provided for in a
method for applying decoration to a cylindrical article which
includes the step of positioning the article for rotation about its
longitudinal axis. The article is moved vertically into engagement
with a strip of decorating material. A heated die is moved
horizontally in a direction perpendicular to the longitudinal axis
of the article to engage the strip of decorating material and to
press the decorating material against the cylindrical article. The
article is rotated on its longitudinal axis. The strip of
decorating material is advanced in the direction of movement of the
die at the same rate as the die.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front elevational view of an apparatus for hot stamping
cylindrical articles constructed in accordance with the present
invention;
FIG. 2 is a vertical, sectional view of the apparatus of FIG. 1
taken along the line 2--2;
FIG. 3 is an enlarged vertical, sectional, elevational view of a
portion of the apparatus of FIG. 1 taken along the line 3--3;
FIG. 3A is an enlarged sectional view of a portion of the tape
take-up gripping mechanism taken along the line 3A--3A of FIG.
3;
FIG. 4 is an enlarged vertical, sectional, elevational view of a
portion of the apparatus of FIG. 1 taken along the line 4--4;
FIG. 5 is an enlarged elevational end view of a portion of the
elevating platform and bottle holder portion of the apparatus as
seen in FIG. 1;
FIG. 6 is a partially broken, side, elevational, enlarged view of
the elevating platform and holder assembly for the cylindrical
article as shown in FIG. 1;
FIG. 7 is a broken, longitudinal, sectional, enlarged view of one
end of the bottle gripping and inflating apparatus;
FIG. 8 is an elevational side view of a portion of the hot stamping
apparatus of FIG. 1 showing the bottle in the raised position prior
to contacting the bottle with the die;
FIG. 9 is a view similar to FIG. 8 showing the position of the
apparatus after the die has traversed over the bottle and applied
the hot stamping indicia thereto; and
FIG. 10 is an enlarged, broken, sectional view of the gripping
mechanism of the tape advancing assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to FIGS. 1 and 2, the hot stamping apparatus of the
present invention includes a base, designated generally by the
numeral 15. The base includes four legs 16 adapted to rest on the
floor. The legs are attached to and support a rectangular top 17.
The rectangular hollow reinforcing members 18 are attached to the
legs and to the top to provide additional rigidity to the base. A
generally rectangular open frame, designated generally by the
numeral 19 is fixedly attached to the top 17 of the base. Frame 19
includes opposed, generally rectangular end plates 20--20 which are
rigidly attached at their edges to top plate 21 and to bottom plate
22. An article holder platform assembly, designated generally by
the numeral 23, is mounted on the top 17 of the base substantially
midway between the end walls or end plates 20--20 of the frame. As
seen more clearly in FIGS. 5 and 6, the article holder assembly
includes a U-shaped base block 24 which is attached to the bottom
plate of the frame as by welding or other suitable means. The arms
of base block 24 are provided with vertical bores 25--25, which
bores are provided with counterbored recesses 26 at each end
thereof which receive bushings 27. Vertical support rods 28--28 are
slidably mounted within the bores 25--25. The lower ends of the
support rods 28--28 pass through openings provided in the bottom
plate of the frame and have their upper ends attached to horizontal
support member 29. A depending, rectangular bracket 30 is attached
by welding or other suitable means to the underside of the support
member 29 and extends into the hollow space provided in the U of
the base block 24. A double-acting, fluid actuated power cylinder
31 has its upper end attached to the underside of bottom plate 22
of the frame, as by welding or bolting or other suitable means. The
power cylinder is provided with a piston rod 32 which slidably
extends through an opening in bottom plate 22 and is attached at
its bifuricated end 33 to the bracket 30 on support member 29. Air
or hydraulic lines (not shown) are attached to each end of the
power cylinder 31 and through suitable pressure sources, valves and
switches permit movement of the article holder assembly 23 in the
vertical direction.
A pair of L-shaped, spaced apart support brackets 34--34 are
slidably attached to the top of support member 29 by means of bolts
35. Rectangular bracket 37 is attached to the left-hand, L-shaped
bracket 34 by means of a set screw 38 which is received in a slot
39 provided in the L-shaped bracket. Bracket 37 is provided with a
micrometer adjustment screw 40 whose lower end bears on the top
surface of L-shaped bracket 34 to provide fine adjustment for the
height of the upper bracket 37. Bracket 37 is provided with a bore
which receives a rotatable shaft 41 having a generally cup-shaped
receiver 42 on its inner end, which receiver is adapted to grip and
align the plastic bottle 43.
Right-hand, L-shaped bracket 34 has attached to its upwardly
extending portion an L-shaped bracket 44 which is provided with a
bore 45 which rotatably receives a shaft 46. The left outer end of
shaft 46 is attached to a generally cup-shaped, neck-receiving
assembly, designated generally by the numeral 47. The right end of
shaft 46 is attached to a fluid powered, double-acting power
cylinder 48. The power cylinder 48 is provided with connections
(not shown) for supplying fluid, such as air or hydraulic fluid, to
actuate the cylinder to move shaft 46 and the bottle neck holder
assembly 47 into and out of engagement with the neck 49 of the
plastic bottle 43.
Referring now to FIG. 7, the bottle neck holder assembly 47
includes a nozzle member 50 whose forward end is tapered and
adapted to engage the neck 49 of the bottle to provide a
pressuretight seal therewith. Shaft 46 is provided with a
counterbore 51 in the end thereof, a portion of which is threaded,
and threadably receives the central portion of the nozzle 50 to
attach the nozzle to the end of the shaft 46. A pair of roller
bearings 52--52 are mounted for rotation at the end of shaft 46.
The outer race of the roller bearings is coupled to sleeve 53 which
has threadably attached to its outer end the generally cup-shaped
bottle neck receiving member 54. Nozzle member 50 is mounted for
rotation on the end of an insert member 55 which is threadably
received in the bore 51 of shaft 46 for rotation therewith. Roller
bearings 56 permit rotation of nozzle member 50 on the end of
insert member 55.
Referring now to FIGS. 1 and 2, a pair of support rods 57--57
extend between the end walls 20--20 of the frame adjacent the top
plate 21. A die platform assembly, designated generally by the
numeral 58, is slidably mounted on the two support rods 57--57
through the base plate 59 which provides passage therethrough to
slidably receive the rods. Base plate 59 has attached to its
underside a water cooled plate 60 which, in turn, has attached to
its four corners a heater block 61 which, in turn, has attached to
its face a metal or rubber die 62 which carries the indicia desired
to be printed on the bottle. The die support platform assembly has
attached to its right-hand end an upstanding bracket member 63. The
bracket member is attached to the outer end of a piston rod 64
which is attached to a piston (not shown) in fluid powered,
double-acting power cylinder 65. Fluid connections are provided
(not shown) to the power cylinder to provide actuation of the
cylinder to move the die support platform assembly from left to
right and to return it to its original position.
As seen in FIG. 2, and in dotted outline in FIG. 1, the die support
platform assembly 58 supports a decorating tape advancing assembly,
designated generally by the numeral 66. The assembly includes a
small, double-acting power cylinder 67 which is mounted on the side
of the base plate 59. Piston rod 68 extending from the cylinder is
connected at its outer end to a pivotable arm 69 whic is attached
to a tape-gripping bar 70. On actuation of the power cylinder 67
(see FIG. 10), the tape-gripping bar 70 is pressed against an
underlying support bar 74 having a resilient strip 74a on its upper
surface to securely grip the metal or plastic decorative tape 71
which carries the heat-transferable material adapted to be
transferred to the surface of the bottle. The tape-gripping bar 70
is rotatably mounted in a pair of downwardly extending brackets
72--72 which are attached to the base plate 59 of the die platform
assembly. Tape-gripping bar 70 is provided with a downwardly
projecting extension bar 73 having a rounded end thereon. The
extension bar 73 presses the decorative tape material 71 against
the cross bar 74 carried by brackets 72--72 to fixedly grip the
tape for movement across the cylindrical surface of the plastic
cylindrical bottle 43.
Referring now to FIGS. 1 and 4, the hot stamp or decorating tape
supply assembly, designated generally by the numeral 75, includes a
rectangular support plate 76 attached to the frame 19 at the rear
lower left-hand corner thereof. A shaft 77 extends from the plate
and supports a roll of decorative tape 77a. The tape is positioned
on shaft 77 between adjustable spool ends 78--78. Thumb screws
79--79 lock the spool ends to the shaft to permit use of decorating
tapes of different widths. Decorating tape 71 from the roll 77a
passes serially over first tension roller 80, second tension roller
81, third tension roller 82, and fourth tension roller 83 and
finally over idler roller 84. Each of the tension rollers includes
a cylindrical tube 85 rotatably journeled on the shaft 86 by means
of roller bearing assemblies 87 at each end thereof. The right-hand
end of each cylindrical tube 85 is in frictional abutment with the
right-hand support plate 76. The left-hand end of the tube is
frictionally engaged by a collar 88 which is keyed to shaft 86 to
prevent rotation thereof. The collar is pressed against the end of
the tube by a spring 89. Cylindrical sleeve 90 is received over the
left-hand end of shaft 86 and presses the spring 89 against the
collar. The sleeve is retained on the end of the shaft by means of
set screw 91. The surfaces of the tubes 85 are polished so as not
to scratch the tape. The tension on the tension rollers can be
adjusted to provide the degree of resistance necessary to insure
that the tape 71 is under the desired degree of tension.
After the decorating tape 75 passes over the idler roller 84, it
next engages the underside of position roller 92 which is attached
by spaced apart brackets 93--93 to the radiant heater plate 94. The
radiant heater plate 94 is fixedly attached to the left end frame
member 20 by means of spaced apart brackets 95--95.
Referring now to FIGS. 1 and 3, the decorating tape take-up
mechanism includes a tape take-up subassembly, designated generally
by the numeral 96, and a tape windup subassembly, designated
generally by the numeral 97. The tape take-up subassembly includes
a generally rectangular, hollow support bracket 98 mounted on the
side of frame member 20. A double-acting, pneumatic power cylinder
99 is pivotably mounted on bracket 98 by means of shaft 100. Piston
rod 101 is pivotably attached at its outer end to arm 102 which is
attached to the rectangular end of tape-locking bar 103. As seen
more clearly in FIGS. 3 and 3A, tape-locking bar 103 is rotatably
mounted on the frame end plate 20 by means of spaced apart,
rectangular brackets 104--104. The underside of the locking bar 103
is provided with a downwardty extending extension 105 which has a
rounded end portion adapted to press the tape 71 against the strip
of rubber or other resilient material 105a which is carried by the
rectangular backing bar 106 which is fixedly mounted between the
brackets 104--104.
The tape windup subassembly 97 is mounted on rectangular bracket
107 attached to the frame 19 at the lower right-hand corner
thereof. Shaft 110 extends from the motor 108 and winds up the used
portion of the decorating tape 71. The left-hand end of the shaft
is attached to drive motor 108 which is preferably a low torque,
high rpm electric motor. The drive motor 108 preferably runs
continuously and drives the shaft 110 to take up the used
decorating tape when the tape is released by the tape-locking bar
103 of the tape take-up subassembly 96. As the tape comes from the
bottle after stamping, it first passes over idler roller 111
mounted on the right-hand end wall 20 of the frame.
The operation of the hot stamping apparatus of the present
invention will not be described with particular reference to FIGS.
8 and 9 and also reference to FIGS. 1 and 2. Initially, the bottle
43 may be placed in the article holder assembly 23 by hand by a
manual operator or through a suitably designed automatic
bottle-feeding apparatus. Through suitable power supply means,
i.e., air or hydraulic fluid, together with suitable electrical
timing means (not shown), the article-holding assembly 23 is
elevated from the lower or proximate position shown in FIGS. 1 and
2 to the distal or upper position shown in FIGS. 8 and 9. Die
support platform assembly 58 at the initiation of the cycle is
positioned at the left-hand side of the hot stamping apparatus as
shown in FIGS. 1 and 8. In this position the die 62 is immediately
above and exposed to radiant heat provided by the radiant heat
plate 94. Additionally, the die 62 is heated from its back side by
means of heater plate 61 carried on the die support platform
assembly. Upon the initiation of the electrical signals, air or
hydraulic fluid is supplied to double-acting cylinder 65 to
initiate movement of the die platform assembly 58 from left to
right. The article holder assembly 23 has positioned the plastic
bottle in the position shown in FIG. 8, i.e., where the bottle
makes firm contact with a portion of the strip of decorating foil
71. As the die support platform 58 moves from left to right, the
die 62 makes contact with the foil or decorative material covering
the bottle 43 and presses the decorative material firmly against
the bottle which has been preinflated by a compressed fluid such as
air through a supply source (not shown). The rigidified bottle and
foil are pressed firmly against the die, and the bottle is rotated
clockwise in precise and accurate registery with the die as it
rotates. The heat from the die and the indicia carried on the face
of the die release the thin metal or other suitable indicia-marking
material from the face of the tape and apply it to the surface of
the bottle 43 as the bottle is rotated. When the die support
platform reaches the position shown in FIG. 9, i.e., after
substantially complete rotation or rotation through whatever degree
of arc is required, a timer mechanism (not shown) actuates the
article-holding assembly to move the assembly downward to disengage
the plastic bottle 43 from the foil and from the die 62. During the
time the die is moving from left to right, the tape-advancing
assembly 66 positively grips the tape by means of the tape-gripping
bar 70 and pulls the tape from the supply roll 77a at precisely the
same rate as produced by rotation of the bottle 43, whereby
positive, firm engagement is made among the die 62, the tape 71 and
the peripheral surface of the pressurized plastic bottle 43.
The transfer characteristics of a particular decorating tape-bottle
combination may require that the tape remain in contact with the
bottle wall for a short time after passing underneath the die to
insure good transfer of the indicia to the bottle wall. In this
case, the timer (not shown) that actuates the tape-gripping bar 70
is set to provide a slight delay in gripping the tape to permit the
tape to adhere to the bottle wall for a short interval after
passing under the die - - i.e., for about 10.degree. to 180.degree.
of arc travel by the bottle during its rotation.
The tension rollers 80 through 83 described hereinbefore provide a
drag or retardation for the tape 71 to insure that the tape is
continuously under tension and does not wrinkle or pucker during
the time the tape is being applied to the surface of the bottle by
the die 62. At the end of the hot stamping step as seen in FIG. 9,
the tape advance assembly 66 opens to free the used portion of the
tape 71 and the timer actuates the tape take-up assembly 96 to
release the end of the tape, whereby the tape windup motor 108
winds up the used excess decorative material 71 on shaft 110. At
the end of a time cycle designed to take up the used tape, the
tape-locking bar 103 of the tape take-up holding assembly locks
down to stop the windup of the excess tape. The timer then actuates
power cylinder 65 to reverse the travel of die platform assembly 58
to move the assembly from the right-hand position shown in FIG. 9
back to the left-hand position shown in FIG. 8. At the same time,
the timer actuates the tape-advancing assembly 66 to release the
tape-gripping bar, thus to permit the advancing assembly to move
back over the tape free of engagement therewith. The sequence is
then repeated for additional hot stamping of other cylindrical
articles.
From the foregoing, it can be seen that the hot stamping apparatus
of the present invention provides a method and apparatus for hot
stamping cylindrical articles wherein the article is pressed into
firm contact with the decorative tape and the die and rotated with
exact registery therewith to produce a precise smudge and
distortion-free transfer of the indicia from the die to the face of
the plastic container. Thus the apparatus and method of the present
invention solve many of the problems present heretofore in prior
art hot stamping apparatuses, such as inability to maintain firm
contact among the die, the tape and the surrace of the bottle,
which results in slippage of the decorative foil producing smudging
or distortion of the indicia transferred to the bottle
periphery.
While the invention has been described with reference to the
drawings, it is understood that the present description is only by
way of example and that many variations and modifications of the
construction of the present invention will be apparent to those
skilled in the art. Therefore, the invention is to be limited only
by the following claims.
* * * * *