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Патент USA US2109583

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March 1, 1938.
Filed Feb. 8, 1936
W .4, '
‘ .<'
Patented Mar. 1, 1938
' 2,109,583
- 2,109,583
Arthur Bennett, San Francisco, Calif.
Application February 8, 1936, Serial No. 62,977
1 Claim. (Cl. 154-43)
The invention relates to adhesive or gummed
tape in general, and particularly to the so-called
pressure sensitive adhesive tape, or ever-tacky
gummed tape, which merely requires pressing
?rmly against a surface to make it adhere there
to, and still more particularly to the type of
ever-tacky gummed tape as shown in my copend
ing patent application ?led on March 26, 1935,
under Serial No. 13,037.
The principal object of the present invention
is to provide a combinationof two gummed tapes
to facilitate transfer of an ever-tacky layer of
gum from a carrier strip to an object having a
frail or soft surface to which it is desired to
15 apply the ever-tacky layer.
Other objects and
advantages of the invention will appear in the
The present invention overcomes the difficulty
above outlined, by providing a compound tape
provided with a relatively wide strip gummed on 5
one side as with a dried mucilage or glue coating
from edge to edge, and which strip is moistened
on its gummed surface and stuck to the object
desired, and a relatively narrow strip of ever
tacky gum is left on the outer surface or back 10
of the wide gummed tape by peeling away from
it an‘ outer covering tape, thus leaving perma
nently attached to the object a wide gummed
tape stuck to the object by common gum on its
under side and the back of which wide tape 15
carries a narrower band of ever-tacky gum.
In Fig. 1a ?exiblestrip or tape I is shown
In the drawing Fig. 1 shows in perspective a
strip of paper tape gummed on one side over its
covered on one side with an adhesive or gum
Fig. 2 is a similar view to that of Fig. 1 but
showing a strip of paper, cloth or other tape,
layer 2. The tape I may be tough paper or of
any other strong flexible material such as Cello- 2
phane, and the gum layer is a dry layer of any
adhesive such as used in gumming postage
gummed on one side with a narrower strip of
stamps, envelopes, etc., which must be moistened
ever-tacky gum.
Fig. 3 is a similar perspective view to the pre
ceding ?gures but shows the tape of Fig. 1 pressed
tightly on top of the ever-tacky gum layer of the
tape of Fig. 2 to form a compound or combina
tion gummed tape constituting the invention.
or strip the cover tape.
following description and accompanying drawing.
20 entire area.
split or come apart when attempting to pull off
Fig. 4 is a side elevation showing the compound
gummed tape of Fig. 3 turned upside down and
with its wide gummed face stuck to an object
and the cloth or other backing of the ever-tacky
gum layer being stripped off.
Before describing the present invention in de
to make it sticky so that it may be stuck to any
desired object.
In Fig. shown a ?exible strip or tape 3 on
one side only of which is deposited a narrower
layer of gum 4. This tape may be of tough paper
or Cellophane, but preferably is of a sized cloth
known to the trade as Holland cloth, and the 30
gum layer 4 is of a character which will not dry,
or will dry so very slowly that'it will remain in a
tacky condition for a long time, or several years,
so that it may be said to be in ever-tacky condi
tion and will stick to any ordinary surface by 35
tail, reference is directed to my copending case
referred to and which describes a gummed tape
pressure alone, without requiring any moistening.
having a layer of ever-tacky gum on one side of
concerned with the present invention as it is
treated of fully in my copending application, as
is also the relation of the tape surfaces or nature 40
thereof relative to the ever-tacky gum to permit
the tape of narrower width than the tape, and of
40 relatively feeble attraction for the surface of the
tape as compared with its attraction or power to
Such ever-tacky gum is well known and not
the tape 3 to be peeled from the ever-tacky layer
stick to the surface of an ordinary object such
as paper, cardboard, metal, glass, dry paint, etc.,
so that after ?rmly pressing the ever-tacky face
45 of the tape upon such an ordinary object, the
tape proper could be easily peeled away from the
ever-tacky layer and leave said layer in ever
tacky condition bodily transferred to said object.
Such transferring ever-tacky gummed tape as
nary surface. However, for convenience the
formula of the ever-tacky gum of the copending 45
case, while not speci?cally concerned with in the
present case, is here repeated as follows:
above described would not work very well on‘v
some special surfaces, such as very soft, frail or
Ibs__About30 5°
Rosin oil _____________________ __lbs__About 41/2
highly absorbent surfaces like soft paper or blot
ting paper, loosely made soft cardboard in which
the material was so weak that it would tend to
Benzol _____________ _..' _______ __gals__About 50
4 when the dry gum layer 2 is stuck to an ordi
Pale crepe crude rubber, ?rst pref- I
erably milled to effect better solu
Place in a suitable closed mixer and agitate
until dissolved into a smooth thin paste.
Such a gum forms an ever-tacky layer when
coated on paper which will permit a covering
The object of having the tape I narrower than
tape I is to permit it to be picked up at either
strip of Holland cloth, Cellophane, or hard glazed
edge with‘ the ?ngernail, when desiring to strip
it from the ever-tackygum, for if both tapes
paper to be peeled from it, especially if the cover
ing strip were given a surface treatment with
talc or para?lne.
The present invention comprises-the combina
tion of the two tapes of Figs. 1 and 2 into a
sandwich as shown in Fig. 3 wherein the parts
10 as described bear the same numerals, and from
a consideration of which ?gure it will be seen
that tape I and its dry gummed layer 2 are co
extensive, tape 3 is narrower than tape I, and
that the ever-tacky gum layer 4 is narrower than
tape 3.
Such a combination tape, having a hard and
dry gummed outer surface 2, may be freely rolled
up upon itself without sticking together. When
unrolled its gummed surface 2 may be moistened
20 to make it adhesive and it may then be applied to
were the same width this would be very di?loult,
especially if some of the moistened gum layer 2
squeezed out along the edges to stick both tapes
together when applying the compound tape to
the object. This object is further facilitated by
having the ever-tacky layer 4 still narrower than 10
tape 3.
The object of having the ever-tacky layer 4
much narrower than gummed layer 2 is to pro
vide a wider area of attachment of tape l to the
object so that it the latter is of soft weak mate 15
rial it will not split or tear, through the upward
pull exerted in peeling the tape 3 from the ap
plied combination as a unit stress to which the ,
soft, weak material is subjected may be but a
third or less than that effective on the cover strip 20
any ordinary surface or object 5, permitted to
set, and the tape 3 peeled away from its layer
of ever-tacky gum 1! by pulling with the ?ngers
or tape 3 due to the great difference in their
overlying adhesive areas.
Having thus described my invention, what I
as shown in Fig. 4 so as to leave the wide tape |
claim is:
25 ?rmly cemented to the object 5 and with the
narrower strip or layer of ever-tacky gum 4 ex
posed in ever-tacky condition on the outer sur
face of the wide tape I so that the object I
(which may be an advertising sign) may be itself
30 applied to another surface or object for adherence
thereto through means of the ever-tacky layer 4.
In forming the compound tape of Fig. 3 I prefer
to ?rst coat the tapes I and 3 and bring them
together as described, but it is possible to form it
otherwise, such for instance as by applying the
ever-tacky layer directly to the opposite side of
tape I after its gum layer 2 is dry, and there
after applying tape 3 as a covering strip to the
ever-tacky layer.
A compound gummed tape comprising a strip 275
of paper coated on one side with a moisture
activatable glue the same width as the tape and
coated on the other side with a layer of pressure
sensltive glue of substantially narrower width
than the width of said moisture-activatable glue 30
and centrally located on the strip leaving un-‘
coated margins on both longitudinal edges, and.
a strip of Holland cloth covering said pressure
sensitive glue, said covering of Holland cloth be
ing of greater width than the layer of pressure
sensitive glue but of lesser width than the width
of the paper tape. .
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