U.S. patent number 3,637,455 [Application Number 05/000,320] was granted by the patent office on 1972-01-25 for prefabricated bow forms.
This patent grant is currently assigned to Minnesota Mining and Manufacturing Company. Invention is credited to Walter C. Pearson, Edward R. Quinn, Dorman N. Thompson.
United States Patent |
3,637,455 |
Pearson , et al. |
January 25, 1972 |
PREFABRICATED BOW FORMS
Abstract
Apparatus for mechanically fabricating prefabricated bow forms
from two strips of decorative ribbon material and including a
drawstring partially bonded to the ribbon, said apparatus
comprising a ribbon and drawstring supply, motor means, a ribbon
bonding assembly for bonding said ribbon materials together at
spaced points, a ribbon advancing means and a ribbon cutoff means.
A simple method of forming decorative bows from the prefabricated
bow forms is also disclosed, said method comprising accumulating
the bonded areas of said prefabricated bow forms one upon another,
simultaneously forming loops of ribbon on either side of said
bonded areas, by means of the drawstring.
Inventors: |
Pearson; Walter C. (St. Paul,
MN), Quinn; Edward R. (Burnsville, MN), Thompson; Dorman
N. (North St. Paul, MN) |
Assignee: |
Minnesota Mining and Manufacturing
Company (St. Paul, MN)
|
Family
ID: |
25155463 |
Appl.
No.: |
05/000,320 |
Filed: |
January 2, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
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791992 |
Jan 17, 1967 |
|
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Current U.S.
Class: |
428/4; 223/46;
428/189; 428/195.1; 156/290; 428/101 |
Current CPC
Class: |
D04D
7/105 (20130101); D04D 11/00 (20130101); Y10T
428/24025 (20150115); Y10T 428/24802 (20150115); Y10T
428/24752 (20150115); Y10T 156/1724 (20150115) |
Current International
Class: |
D04D
7/00 (20060101); D04D 7/10 (20060101); D04d
007/10 () |
Field of
Search: |
;2/244,300 ;289/1.2
;93/1.5 ;112/410,411 ;132/47 ;161/9,10,21,49,112,140 ;28/2 ;223/46
;156/226,227 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Goolkasian; John T.
Assistant Examiner: Epstein; Henry F.
Parent Case Text
This application is a continuation-in-part of application Ser. No.
791,992, filed Jan. 17, 1969, and now abandoned.
Claims
What is claimed is:
1. A prefabricated bow form for a formal bow formed from two
lengths of ribbon and a drawstring, said ribbons being in
superimposed back to back relationship with said drawstring
centrally interposed therebetween, said ribbons and drawstring
being firmly bonded together at a first bonded narrow elongate
rectangular area at one end of said bow form, said ribbons being
bonded together in a narrow elongate segmented rectangular bond at
at least two other spaced points along the length of the composite
of ribbon and drawstring, said drawstring being unbonded to said
ribbons but being constrained by said at least two other segmented
bonds, said at least two other spaced points being progressively
increasingly removed from said first bonded area and being
intermediate the other end of said bow form such that a length of
the composite of ribbon and drawstring extends from the last of
said at least two other bonds.
2. A prefabricated bow form for a pompon bow formed from two
lengths of ribbon and a drawstring, said ribbons being in
superimposed back to back relationship with said drawstring
centrally interposed therebetween, said ribbons and drawstring
being firmly bonded together at one end of said bow form, said
ribbons being bonded together at a plurality of spaced points along
the length of the composite of ribbons and drawstring, said
drawstring being unbonded to said ribbons but being constrained by
said bonded ribbons, said ribbons being notched at each of said
bonded areas along their lengths.
Description
The present invention relates to the art of gift wrapping packages
and provides a method and apparatus for mechanically producing
ornamental bows.
In recent years the gift wrapping of packages both at the point of
purchase and by the product manufacturer has become a highly
commercialized business. Manufacturers of decorative ribbons and
decorative wrapping papers and such like have vigorously promoted
the use of their commodities in the preparation of attractively
wrapped packages. Many industrial concerns, for example, department
stores and novelty shops, have organized separate departments
almost exclusively engaged in gift wrapping commodities purchased
elsewhere in their stores. Particularly around holiday times, these
departments gift wrap large numbers of packages every working day.
Others have made a business of fabricating decorative bow
structures in mass quantities for sale to home users, so that the
latter can wrap their own gifts and packages, and formulate their
own decorative displays without having to tie or fabricate
decorative bows themselves.
Such wide and increasing commercial usage of decorative ribbon
products require that the decorative bow structures be susceptible
to production in large quantities in a relatively short time. The
fewer manual operations involved the better. However, in order to
be sufficiently aesthetically pleasing and unique so that the
purchasing public is willing to use the bow products on personal
gifts and packages, the bows must be individualistic in appearance,
that is, they should not be stereotyped or nonpersonal. Ordinarily,
mass production, on the one hand, and the provision of attractive,
unique, individualistic and artistic appearing bow products, on the
other, are antagonistic desires. The present invention is
especially concerned with the mutual satisfaction of these
wants.
Various literature articles and patents have issued from time to
time over recent years relating to the provision of decorative bow
structures and to machines and devices for making the same. The
ornamental pompon or puff bows and "star" bows have become quite
popular. This popularity is due, in large part, to the ease and
speed with which pompon bows can be formed from a prefabricated
hank of ribbon or by machines in the case of the "star" bows. Most
recently, machines for making pompon or puff bows have come into
use. It must be recognized, however, that completely formed machine
fabricated bows require an inordinate amount of storage space and
care must be exercised in handling such completed bows lest they
are crushed or otherwise damaged.
In contrast, formal or tailored bows are typically fashioned by
hand from a plurality of loops of ribbon of different lengths
lineally superimposed one upon another with the smallest loop on
top, the center of the loop stack being then held together with a
constraining device which may be a band of ribbon material or a
decorative band. Although the formal or tailored bow is well
accepted and desired by a large majority of people, it has not been
commercially available in great quantities due to the large amount
of manual operations required in the fabricating process and the
fragile nature of the ribbon loops.
The present invention provides simple apparatus for mechanically
fabricating partially completed formal bows (prefabricated bow
forms or prebows) and provides a method for producing formal
bows.
The present invention also provides apparatus for mechanically
fabricating prebows of the pompon or puff bows and provides a
unique method for producing pompon or puff bows.
The present invention possesses a number of advantages, among which
are the following:
1. A large number of prebows, along with a selection of
constraining devices for formal bows can be made conveniently
available to the user in a relatively small container or
containers.
2. Shipping and handling of the bonded flat prebows reduces to a
minimum the possibility of mutilation or degradation of the
aesthetic value of the completed bows.
3. The method for forming the completed bows is so simple that the
user need not have special skills or above average manual dexterity
to form the bow in minimal time.
4. The ribbon material used for the bow may be either one sided or
two sided, i.e., ribbons finished on one face or on both faces.
5. Since the ribbon material input is in pairs, either ribbon can
be changed so as to produce a bow construction having dissimilar
colors, textures, patterns or materials from one side to the
other.
6. The number of bonded areas and the distance between them may be
varied to produce bows with a correspondingly varied number and
size of loops.
7. The distance between the final bonded area and the end of the
bow tail of formal prebows can be lengthened sufficiently to
provide the bow with its own facility for banding to the package to
which it is to be attached.
The invention will be more readily understood from the following
detailed description and disclosure, especially in light of the
accompanying drawings, wherein like numerals refer to corresponding
parts in the several diagrammatic views, in which:
FIG. 1 is a front elevational view of a machine of the present
invention;
FIG. 2 is a plan view of the machine of FIG. 1;
FIG. 3 is an end elevational view of the ribbon bonding mechanism
taken along line 3--3 and in the direction shown in FIG. 1;
FIG. 4 is an enlarged side view of the heat-sealing device taken
along line 4--4 of FIG. 3;
FIG. 5 is an end elevational view of the ribbon advancing means
taken along line 5--5 of FIG. 1;
FIG. 6 is a sectional view of the ribbon cutoff means taken along
the line 6--6 of FIG. 2;
FIG. 7 is a sectional view of the ribbon advancing means and the
ribbon cutoff means taken along the line 7--7 of FIG. 1;
FIG. 8 is a plan view of a prebow according to the present
invention;
FIG. 9 is a perspective view of the prebow of FIG. 8 in the process
of being converted to the formal bow of the present invention;
FIG. 10 is a perspective view of the formal or tailored bow of the
present invention;
FIG. 11 is a diagrammatic view of another embodiment of a machine
of the present invention particularly suited for the fabrication of
pompon bows;
FIG. 12 is a perspective view of the prebow for pompon bows
fabricated by the machine of FIG. 11 with portions of the ribbon
material removed;
FIG. 13 is a perspective view of the prebow of FIG. 12 in the
process of being converted into a pompon bow; and
FIG. 14 is a perspective view of the completed pompon bow.
Referring now to the drawings, the machine 10 comprises a base 11
upon which is mounted ribbon supply means 20, motor means 29,
ribbon bonding assembly 38, ribbon advancing means 60 and ribbon
cutoff means 70.
Ribbon supply means 20, in the embodiment shown in the drawings,
comprises a plate member 21 suitably affixed to base 11. Ribbon
spindles 22 and 23 and drawstring spindle 24 are mounted onto plate
member 21 to removably rotatably accommodate the necessary ribbon
and drawstring supply rolls. Also mounted onto plate member 21 are
ribbon guide members 25 and 26 as well as drawstring guide member
27, all in the form of spindles. In the embodiment shown in FIGS. 1
and 2, ribbon guide member 26 is supported by arm 28 affixed to
drawstring guide member 27. Ribbon guide member 26 is additionally
provided with a grooved plate (not shown) which centers the
drawstring as the composite of ribbons and drawstring are drawn
into the machine.
Motor means 29, as shown, is a reciprocating air motor having an
air cylinder 30, a reciprocating drive shaft 31 to which is
attached a follower shaft 32 and guide rail 33. Follower shaft 32
is provided with a collar 34 which is rigidly secured to follower
shaft 32 on one end and slidably rides guide rail 33 on the other
end. A return stroke collar 35 and an advance stroke collar 36 are
affixed onto guide rail 33 and serve to determine the length and
position of the stroke of drive shaft 31. Microswitch 37 is
electrically connected to clamp air cylinder 60 through a solenoid
(not shown) and is mounted on plate member 21 and is arranged so
that its contact is actuated by return stroke collar 35. The
forwardmost end of drive shaft 31 is suitably rigidly secured to
ribbon bonding assembly 38 which accordingly reciprocates with
drive shaft 31. It is, of course, possible to substitute any of a
number of equivalent motive means to effect the reciprocating
action required of motor means 29, and such alternatives are
contemplated.
Ribbon bonding assembly 38 which heat bonds the ribbon structure at
spaced points comprises a clamp frame 39, clamp air cylinder 45 and
sealing pad assembly 47. Clamp frame 39 is an open generally
rectangular boxlike frame member without a bottom frame. One
forward leg member 40 is provided with an elongated clamp foot 41,
the ends of which are slightly upwardly bent. Each of the leg
members, 40 and 40a of clamp frame 39 (or a supporting plate, as
shown in FIGS. 1 and 2) is provided with an aperture 42 through
which slide rods 43 which are affixed to base member 11 are passed
and which guide clamp frame 39 as it reciprocates. Microswitch 44
is electrically connected to cutoff air cylinder 71 through a
solenoid (not shown) and is mounted on base member 11 and the
contact thereof is actuated by clamp foot 41 as it passes thereover
during the forward and backward movement of clamp frame 39.
Clamp air cylinder 45 is securely attached to clamp frame 39 and
has a drive shaft 46, to the end of which is suitably affixed
sealing pad assembly 47. Sealing pad assembly 47 comprises a
support channel 48 having upturned flanges 49 along the
longitudinal edges thereof. Heater support plate 50 is carried by
upturned flanges 49 within support channel 48 and is coextensive
with said channel. Sealing pads 51, 52 and 53 are in turn carried
by support plate 50 and are affixed thereto as with bolts 54 and
angular support brackets 55. As will be clearly seen in FIG. 4,
sealing pads 51, 52 and 53 are prisms having six faces and two
ends, the cross section of which has a compound shape of a
rectangle on a trapezoid, but may take any number of shapes. These
sealing pads 51, 52 and 53 are constructed of a heat-conducting
material, e.g., aluminum. In the embodiment shown in the drawings,
the bottom or ribbon contacting face of sealing pads 51, 52 and 53
is a rectangle whose lengthwise dimension is perpendicular to the
ribbon length and whose crosswise dimension is approximately
one-eighth inch. In addition, sealing pads 52 and 53 are provided
with rectangular relief slots such as 53a at their midpoints, said
relief slots being slightly wider than the drawstring. Brackets 55
are insulated from sealing pads 51, 52 and 53 by a suitable
insulating material such as asbestos sheeting 56. A suitable
thermostatically controlled electric heating element 57 is provided
in the apex of sealing pads 51, 52 and 53.
Clamp bed 58 is affixed at about the midpoint of each leg member of
clamp frame 39, as by welding, and is generally U-shaped with the
legs of the U downwardly inclined. A resilient thermal and
mechanical insulating pad 59, e.g., of nylon, is adhesively or
otherwise attached to the exposed upper surface of clamp bed
58.
While heat bonding and means for accomplishing same have been
described herein, it is possible to bond the ribbon materials by
other means such as with adhesives, adhesive tape or strip material
and by solvent bonding particularly since the bonded areas are
completely concealed in the completed bow form.
Ribbon advancing means 60 comprises a shaft 61, one-way bearings 62
which transmit torque to shaft 61 only for clockwise rotation, a
free bearing 63, a pulley 64, pulley belt 65 and a rubber drive
wheel 66 securely fastened to shaft 61. In the embodiment shown in
FIG. 5, ribbon advancing means 60 is mounted onto base 11 by
supporting members 67. Ribbon guide 68 in the form of a channel
with turned in edges (C-shaped) is located immediately beneath
rubber drive wheel 66 and is carried on one end by brace member 69
which spans and is attached at its ends to supporting members 67.
At the other end, ribbon guide 68 is affixed to ribbon cutoff means
70.
Ribbon cutoff means 70 comprises an air cylinder 71 having a drive
shaft 72 to which is affixed cutoff assembly 73. Cutoff assembly 73
comprises a mounting block 74 into which is removably inserted
cutting dies 75a and 75b. Cutting dies 75a and 75b are typically
fabricated out of stainless steel blade stock and are provided with
apertures for attachment to mounting block 74 with screws. Cutting
die 75a is arranged perpendicular to the direction of travel of the
ribbon materials and cutting die 75b is arranged at an angle of
about 45.degree. to the direction of travel. The exhaust manifold
of air cylinder 71 is connected to a length of hose 76, the free
end of which is placed adjacent cutting dies 75a and 75b so that
ribbon chips left in the cutting operation may be blown clear.
Anvil 77 is affixed to frame 78 of ribbon cutoff means 70 and is
provided with a resilient pad, e.g., of nylon, to protect cutting
dies 75a and 75b against excessive wear. Another equally effective
method of cutting the composite ribbon structure is by the use of
"scissor blades," wherein one set of blades is mounted in fixed
position onto frame 78 and the other set of blades is mounted onto
mounting block 74.
In operating the bow forming machine 10 of the present invention, a
suitable air supply source (not shown) is connected to motor means
29, clamp air cylinder 45 and cutoff air cylinder 71. A suitable
electrical power source is provided for heating elements 57 of
sealing pads 51, 52 and 53.
Ribbon material 101 and 102, which may be of a single-sided
construction or of double-sided construction, in roll form are
mounted onto ribbon spindles 22 and 23, respectively. Ribbon roll
101 is mounted as shown in FIG. 1 to feed the ribbon with its
decorative side uppermost; ribbon roll 102 is mounted to feed the
ribbon with its decorative side facing downward. Drawstring
material 103 is mounted on spindle 24 and may be mounted to feed in
either direction. Drawstring material 103 shown in the drawings is
a thin narrow strip material of the type commonly used in "easy
open" packages but may, of course, be a string or thread.
When the air supply and electrical power is turned on, the drive
shaft 31 of reciprocating air motor 29 is caused to travel back and
forth in linear fashion. The length and position of the strokes are
governed by the position of the return stroke collar 35 and advance
stroke collar 36. Ribbon bonding assembly 38 which is securely
fastened to the air motor drive shaft 31 is likewise caused to
reciprocate in similar fashion.
Ribbons 101 and 102 and drawstrings 103 are fed around and through
guide members 25, 26 and 27, respectively, and then through one-way
brake 104, thence between sealing pads 51, 52 and 53 and clamp bed
58, and under drive wheel 66 of ribbon advancing means 60.
When the air supply and electrical power source is turned on with
the bow forming machine 10 at the position shown in FIG. 1, drive
shaft 31 and ribbon bonding assembly 38 advances (toward the left
in FIG. 1) with sealing pad assembly 47 in the down position
pressing the composite of ribbons 101 and 102 and drawstring 103
against clamp bed 58. Sealing pad assembly 47 was moved to its down
position by the actuation of microswitch 37 by return stroke collar
35. As ribbon bonding assembly 38 advances, pulley belt 65, one end
80 of which is fastened to rear clamp frame leg 40a, causes rubber
drive wheel 66 to rotate in the clockwise direction thus advancing
ribbons 101 and 102 and drawstring 103 within ribbon guide 68
toward and through ribbon cutoff means 70. As drive shaft 31 and
clamp frame 38 continues its forward motion, clamp foot 41 rides
over and trips microswitch 44. However, since microswitch 44 is
connected in series with microswitch 37, which at this moment is
still in an actuated position, microswitch 44 does not actuate
cutoff air cylinder 71. At the forwardmost travel of drive shaft
31, collar 34 on follower shaft 32 engages advance stroke collar 36
thus driving guide rail 33 and return stroke collar 35 forward
thereby deactivating microswitch 37 and causing clamp air cylinder
45 to raise sealing pad assembly 47. It will be seen that sealing
pad assembly has been in the operative (down) position for the
duration of the entire advance stroke. Thus, the composite of
ribbon 101 and 102 and drawstring 103 is heat bonded together at
bond areas 111, 112 and 113, by the action of heat from heat
elements 57 in sealing pads 51, 52 and 53, the pressure between
said sealing pads and clamp bed 58 and the dwell time, which is
determined by the duration of the advance stroke. It is obvious
that the temperature range of heater elements 57, the amount of
pressure applied by sealing pads 51, 52 and 53 and the dwell time
must be determined from the characteristics of the ribbon materials
101 and 102. For "Sasheen Brand" ribbon material, a temperature of
about 400.degree. F., a clamp air cylinder pressure of about 50
p.s.i. gauge and a dwell time of about 4 seconds was found to
provide satisfactory bonds between ribbons 101 and 102. The
deactivation of microswitch 37 now completes the series circuit to
microswitch 44 which, however, is in a deactivated position at this
time since clamp foot 41 has passed beyond microswitch 44.
After drive shaft 31 has reached its forwardmost point, drive shaft
31 begins its return stroke. frame 38, of course, also begins to
move in the return direction. Clamp foot 41 again rides over and
trips microswitch 44 actuating cutoff air cylinder 71 to bring
cutting dies 75a and 75b into contact with the ribbon structure.
After clamp foot 41 passes beyond microswitch 44, microswitch 44 is
again deactivated.
Pulley belt 65, the other end 81 of which is fastened to leg 40,
rotates pulley 64 in a counterclockwise direction but does not
rotate shaft 61 and rubber drive wheel 66 due to one-way bearings
62.
One-way brake 104 comprising a leaf spring which bears against the
surface of clamp bed 58 grips the composite ribbon structure and
causes it to travel along with clamp frame 38 during the advance
stroke. One-way brake 104 freely allows the ribbon structure to
slide with respect to the clamp bed 38 in the reverse stroke
direction. One-way brake 104 also isolates the rearmost sealing pad
53 from the unwind tension zone thus eliminating possible
distortion, elongation or fracture of the ribbons 101 and 102 and
drawstring 103 during the bonding operation. One-way brake 104 may
also take the form of an eccentrically mounted roll having one or
more O-rings of rubber or other high-friction material mounted on
the roll for contact with the ribbon material.
Ribbon cutoff means 70, as previously noted, is actuated when clamp
foot 41 passes over microswitch 44 on the return stroke. Cutting
dies 75a and 75b are arranged so that a straight cut transverse to
the ribbon is effected at the leading edge of the bow structure on
the incoming side of the die and an angular cut (about 45.degree.)
on the trailing edge of the bow structure leaving the die. The
transverse cut is effected at the leading edge of the heat-seal
bond made by the forwardmost sealing pad 51. The substantially
right triangular ribbon chips and the short length of the
drawstring produced in the cutting operation is blown clear by the
exhaust pulse produced from cutoff air cylinder 71 through hose
76.
The completed prebows 110 are allowed to fall from ribbon cutoff
means 70 down chute 105 into a catch box 106, which may be a
packing container for the prebows.
As will be clearly seen from FIG. 8, the prebow 110 comprises two
strips of ribbon material 101 and 102, of the same or different
colors, and a drawstring 103 bonded together at three spaced points
111, 112 and 113. The bonded area 111 is continuous and extends
across the entire width of prebow 110. In contrast bonded areas 112
and 113, although extending across the width of prebow 110, is
segmented at the midpoint so that drawstring 103 is constrained by
the bonded areas 112 and 113 but not bonded thereby. Segmented
bonds 112 and 113 are formed by the middle and rear sealing pads 52
and 53 which are provided with relief slots such as 53a (FIG. 3) at
their midpoints.
One method of forming the tailored bow 115 of the present invention
is as follows: ribbon material 101 (or 102) is grasped between the
thumb and index finger of one hand immediately below bonded area
113 (as seen in FIG. 9) with either the thumb or index finger
inserted between the two strips of ribbon material 101 and 102, and
with the remaining three fingers on the opposite side of ribbon
material 102 (or 101). Drawstring 103 is then grasped between the
thumb and index finger of the other hand and gently pulled. As
drawstring 103 is thus gradually pulled, loops 116 will be formed
by the ribbon material between bonds 113 and 112 immediately above
bond 113. As the pulling is continued, loops 117 will be formed by
the ribbon material between bonds 112 and 111 immediately above and
in an aligned and stacked relationship to loops 116. When
drawstring 103 is pulled to its full extent such that bonds 113,
112 and 111 are tightly pressed together in stacked relationship,
the bow is regrasped by moving the thumb over and onto superimposed
bonds 111, 112 and 113 and the remaining fingers are placed
immediately between ribbon 101 and 102. At that point, drawstring
103 may be cut off at bond 113 or may be forcefully pulled
whereupon it will be released from bond 111. The thus formed bow
can be fastened together by various means at its center so as to
restrain the ribbons from returning to their original flat
position. A decorative band 118 in the form of a bend-over strip or
decorative ribbon material is placed around the loop stack at the
bow center to conceal bond areas 111, 112 and 113 to thus form the
completed tailored bow 115. The decorative band 118 may be provided
with a pressure-sensitive adhesive coating protected by a covering
strip to provide a convenient means of adhering the bow 115 to a
package.
Another and perhaps easier method of forming bow 115 is to grasp
drawstring 103 immediately beneath bond 113 with the fingers of one
hand while holding drawstring 103 at its extreme end in the other
hand and pushing against bond 113 until loops 116 and 117 are
formed and accumulated in stacked relationship. The bow 115 is then
completed as hereinabove described.
Referring now to FIG. 11 which diagrammatically illustrates
apparatus for producing prefabricated pompon bow forms or prebows,
the apparatus will be seen to comprise ribbon spindles 122 and 123
and drawstring spindle 124. Ribbon guide members 125, 126 and 127
in the form of spindles are also provided. Ribbon guide member 127
is additionally provided with a grooved central section (not shown)
which acts as the drawstring guide and centering means. In the
specific embodiment illustrated, two pairs of driven squeeze rolls
128 and 129 are provided to pull the ribbon materials through the
machine. Two additional pairs of intermittently driven squeeze
rolls 130 and 131 provide the means for passing the ribbon and
drawstring composite into notcher assembly 132, momentarily
stopping said composite in notcher assembly 132 at which time the
composite is suitably notched, and pulling the notched segment out
of notcher assembly 132, the next segment of ribbon and drawstring
composite being passed into said notcher assembly. Another pair of
driven squeeze rolls 133, driven at the same speed as squeeze rolls
128 and 129, acts to tension the ribbon prior to its being wound
onto windup roll 134, also driven at about the same speed as
squeeze rolls 133. The machine also includes ribbon bonding
assembly 138 which, in the embodiment illustrated, is a double
orifice hot melt head which is pulsed to apply two spaced dots of
hot adhesive onto one surface of ribbon, the spacing between the
dots of adhesive being such that the drawstring will not be bonded
to the ribbon. A single orifice hot melt head 139 which is also
pulse regulated applies a single dot of adhesive centrally disposed
across the ribbon width at the starting point of each prebow to
bond the drawstring to the ribbon.
It will be understood that suitable motor means is provided to
drive the squeeze rolls 128, 129, 130, 131 and 133, notcher
assembly 132 and windup roll 134. In addition, the motor means may
also be used to pulse the hot melt heads 138 and 139 through
appropriate cam or other mechanical means. Alternatively, the hot
melt heads 138 and 139 may be pulsed through an appropriate
electrical timer.
The machine illustrated in FIG. 11 operates in substantially the
following manner. Ribbon materials 201 and 202, which may be of
either single-sided or double-sided construction, in roll form are
mounted onto ribbon spindle 122 and 123 respectively. Where
single-sided ribbon material, which is the preferred material, is
used, the ribbon rolls 201 and 202 are mounted as shown so that the
decorative side of the ribbon is outermost. Drawstring material 203
is mounted on spindle 124 and may be mounted to feed in either
direction.
Ribbons 201 and 202 and drawstring 203 are threaded around guide
members 125, 126 and 127, respectively, and thence successively
through squeeze rolls 128 and 129; a slack loop being formed
between squeeze rolls 129 and the composite of ribbons 201 and 202
and drawstring 203 is fed through squeeze rolls 130 and into and
through notcher assembly 132, through squeeze rolls 131 and 133
with a slack loop therebetween.
With the appropriate power sources turned on, driven squeeze rolls
128 and 129 begin to pull ribbons 201 and 202 and drawstring 203
through the machine. Double-orifice hot melt head 138 is actuated
and applies two spaced dots of adhesive 211 and 212 on the upper
surface of ribbon 202. Single-orifice hot melt head 139 is actuated
to apply a dot of adhesive 213 centrally of dots 211 and 212 on the
upper surface of ribbon 202. When ribbon 202 with adhesive dots
211, 212, and 213 applied thereto reaches squeeze rolls 128,
drawstring 203 and ribbon 201 are superimposed thereupon and are
bonded together during passage through squeeze rolls 128. Squeeze
rolls 128 may, if desired, be chilled to accelerate bonding of the
composite of ribbons 201 and 202 and drawstring 203. The
thus-bonded composite then passes through squeeze rolls 129 and 130
and into notcher assembly 132. Notcher assembly 132, through
appropriate cams or other mechanical or electrical means is
actuated to notch the bonded composite of ribbons 201 and 202 and
drawstring 203 with a pair of notches 214 and 215, the notches
being located such that substantially all of the ribbon material
immediately outward of adhesive dots 211 and 212 is excised in the
notching process. The notches which are shown in the drawing to be
semicircular may of course take other shapes. The notched composite
then passes through squeeze rolls 131 and 133 and is then wound
onto windup roll 134. Squeeze rolls 130 and 131 are geared or
equivalently equipped to briefly intermittently stop to permit
notcher assembly 132 to be actuated.
Prebow 210 is typically fabricated to comprise 10 segments of
ribbon to produce a pompon bow having 20 loops. The number of loops
may, of course, be varied to produce pompon bows having any desired
degree of "fullness." For a 20-loop pompon bow the single-orifice
hot melt head 139 would be sequentially actuated at the beginning
of the operating cycle (as hereinabove described) and again after
each 10 actuating cycles of double-orifice hot melt head 138.
Double-orifice hot melt head 138 would be actuated to place
adhesive dots 211 and 212 at selected equidistantly spaced points
along the length of ribbon 202. The spaced points would, of course,
be selected so as to produce loops having the desired length. For
example, if one desired to produce a pompon bow having 5-inch
loops, the double-orifice hot melt head 138 would be actuated to
place adhesive dots 211 and 212 at 5-inch intervals. At each
55-inch interval, single-orifice hot melt head 139 would be
actuated to place adhesive dot 213 centrally of adhesive dots 211
and 212 so that drawstring 203 would be bonded to the ribbons 201
and 202 to produce prebows in a continuous process.
In one method of fashioning a pompon bow from prebow 210, a single
prebow consisting of a fully bonded end 216 (i.e., the end wherein
the drawstring 203 is bonded to the ribbons 201 and 202) and 10
segments of ribbon wherein the drawstring is unbonded to the
ribbons, unwound from the supply roll of prebows fabricated as
above described and cut off therefrom, is grasped with the fingers
of one hand at the bonded area farthest removed from fully bonded
end 216 such that the ends of ribbons 201 and 202 are separated and
drawstring 203 is exposed. Drawstring 203 is then grasped between
the thumb and index finger of the other hand and steadily pulled to
form loops L from the ribbon segment between the bonded areas. In
the formation of loops L, the notches 214 and 215 permit the loops
to rotate and orient themselves to form pompon bow 217, the
individual loops L thereof being uniformly dispersed about the
center of the bow. After loops L have been formed and accumulated
and pompon bow 217 formed, the drawstring is securely fastened at
the bottom of the bow. This can be conveniently accomplished with a
small square card (not shown) having a slot therein to its
approximate midpoint, the drawstring then being wound about said
card and inserted into the slot where it is frictionally retained.
The card may have a pressure-sensitive adhesive coating on one side
thereof protected by a suitable liner material for easy attachment
of the completed pompon bow 217 to a package.
* * * * *