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Патент USA US3057586

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Oct. 9, 1962
Filed March 11, 1960
_ 3,057,576
2 Sheets-Sheet 1
1 16
16 /2s
Oct. 9, 1962
Filed March 11, 1960
2 Sheets-Sheet 2
United States Patent 0 F ice,
Camille Scaglia, Bremhilla, Italy, assignor to M. Scaglia,
Societa per Azioni, Brembilla, Italy, a joint-stock com
pany of Italy
Filed Mar. 11, 1960, Ser. No. 14,232
9 Claims. (Cl. 242—118.6)
Patented Oct. 9, 19,62
tended to be descriptive of the invention and are not to be
taken as restrictive of the invention.
In the drawings:
FIG. 1 is a partial sectional side elevation view of one
of the bobbin ends.
FIG. 2 is a partial sectional side elevation view of
a ‘bobbin section, in the process of manufacture. '
FIG. 3 shows a partial sectional side elevation view of
The invention relates to bobbins adapted for holding
a further embodiment of the bobbin.
large quantities of yarn wound thereon. More particu 10
FIG. 4 shows the bobbin of FIG. 3, just before the
larly, the bobbins are adapted for having yarn of syn
?anges are secured to the core.
thetic ?bers wound thereon.
FIG. 5 is a view of the bobbin in FIG. 3 showing in
detail the relationship between the ?ange and the core
When winding synthetic ?bers on bob-bins, there is
when the ?ange is subjected to stress by the yarn.
caused high stresses on the bobbiu’s ?anges which may
cause separation of the bob-bin’s ?anges from the bobbin’s 15
FIG. 6 shows the bobbin as seen in the direction of
arrow VI of FIG. 5.
It is an object of the invention to provide a bobbin
FIG. 7 is a vertical sectional view of apparatus for
forcing the plugs into both bobbin ends.
wherein the ?ange and core are assembled elements of
different material but yet are inseparable under the pres
The bobbin as shown in FIGS. 1 and 2, comprises a
sure exerted by yarns of synthetic ?bers When the same 20 metal core A, preferably of aluminium or its alloys,
is wound on the bobbin.
Whereon the ?anges B, of wood or like suitable material,
are secured. The ?anges are positively held on both core
It is a further object of the invention to provide a
bobbin as above described and wherein there is provided
ends by peripheral projections 10‘, formed near the ends
means for preventing entry of yarn into ?ssures between
of core A.
the core and ?anges caused by the pressure of the yarn 25
Each ?ange B is provided with a bore 12, wherein the
against the ?anges.
end 14 of core A is inserted as explained in more detail
It is a feature of the bobbin according to the invention
hereinafter. A seat 16 is formed in the inside portion of
that yarn of synthetic ?bers can be wound continuously
the bore 12 to accommodate the previously described
on the bobbin without breaking and loss of yarn.
shoulder 10. A further larger seat 18 (see FIG. 2) with
It is a further feature of the bobbin according to the 30 a steep wall, is formed on the outer portion of the bore,
invention that it is easily manufactured and economical
to accommodate the ?anged edge 20 (FIG. 1) of the
to produce.
core end 14.
According to the invention the bobbin comprises a
V Plugs C, of suitably resilient material, are forced, in
tubular core element and a ?ange element on and en
the manner which will be described in more detail here
circling the core element. Only one of the elements is 35 inafter, into both ends of core A. It has been found
metallic. The bobbin additionally comprises means for
that wood is the most suitable material for the plugs
securing the ?ange element to the core element to resist
with the ?bers of the wood running parallel to the axis
of core A. Consequently, the plug provides practically
forces applied to the ?ange element by yarn wound on
the bobbin and means ‘for preventing entry of the yarn
uniform elasticity in all different radial sections. The
on the bobbin into the ?ssure formed between the ?ange
outside diameter of plug C should be slightly larger than
element and the core element when the ?ange element
the inside diameter of the bore 12 or the core A. An
is de?ected under the action of the force exerted by the
axial bore 22 is provided in plug C. Plug C has a lead
yarn wound on the bobbin.
ing edge 24 formed in one end thereof, while a periph
More particularly, the above-noted means are consti
eral slot 26 is cut in the opposite end.
tuted by an annular projection on and integral with the 45
The core A is preferably formed from a metal tube,
core element and extending radially outwardly thereof.
and the ?anges are machined preferably from wood.
The projection includes an inner ridge extending perpen
The ?anges B are secured to core A in the following
dicularly from the core element radially outward. A plu—
manner: The ?anges B are forced on both ends 14 of
rality of teeth are provided on the projection extending
core A until the seat 16, on each ?ange is engaged against
radially outwardly therefrom. The ?ange element is pro 50 the shoulder 10‘, and the adjacent portion of the core
periphery, as shown in FIG. 1. Thereafter, the edge of
vided with indentations for accommodating the teeth on
core end 14 is formed with a ?ange and brought into con
the projection. The inner face of the ?ange element is
tact with the wall of seal 18 of ?ange B to tightly secure
coplanar with the ridge when the teeth are enmeshed
in the indentations. Furthermore, the outer face of the 55 the ?ange B onto the end of core A.
The bobbin is then placed into a bush (see FIG. 7)
?ange element is tapered in part to form a seat and the
constituted by two symmetrical portions 50‘ and 52, hav
core element includes an end portion which is engaged
ing ends with crowns 54 provided with suitable abut
in the seat such that the ?ange element is retained against
ments 56 for accommodating the ?anges B.
movement longitudinally along the core element by the
The bush 50—52, with the bobbin inserted therein,
annular projection and the end portion.
60 is ?tted on a ‘base plate 60, by inserting one of the
The manufacturing procedure of the bobbin de?ned
crowns 54 into a seat 58 formed on the base plate. A
above is characterized by the following steps; a ?rst series
ring 62 formed with a seat 64, similar to seat 58, and
of shoulders is formed on both ends of the metal core;
adapted for accommodating crown 54 of the bush, is
opposite seats are cut in the ?ange bores; both ends of the
placed on the upper end of the bush. Thus, both halves
metal core are inserted into such ‘bores; the jutting sece 65 50 and 52 of the bush are secured together to ?rmly
tions of the core edges are ?anged to bring them into
support the bobbin therebetween.
engagement with the seats formed on the ?anges, and
A crown 66‘ on the upper end of ring 62 is formed
?nally plugs of resilient material are forced into the core
with a ?ared bore 68, which has a smaller minimum
ends, wherein they are held by the spring reaction ex
diameter than the inside diameter of the tapered portion
70 14 of core A. The plug C is inserted into the bore 68, and
erted by the core ends and by the associated ?anges.
Several embodiments of the invention are shown in
is then forced thereinto, by a plunger 70 provided with a
.the accompanying drawings, which embodiments are in
reference pin 7-2 until the groove 26, around the plug pe—
elements being coplanar with said ridge ‘with the teeth in
riphery, engages the annular projection on the core end
said indentations, the outer face of said ?ange element
being tapered in part to form a seat, said core element
The plug C, due to its inherent elasticity undergoes
compression shrinkage when it is forced into the bore
68 of ring 62.
including an end portion engaged in said seat, said ?ange
element being retained against movement longitudinally
along the core element by said annular projection and
said end portion.
When the bottom of bore 68 has been
reached by the plunger 70, the plug C is wholly inserted
into the bore of core A, and groove 26 is engaged with
2. A bobbin comprising a tubular core element, a
the annular shoulder on the core end 14. The plug, due
?ange element having an opening and encircling the core
to the elastic pressure forces the end portion thereof
against the bore 12 of ?ange B, thus positively ensuring 10 element, said elements being of dissimilar materials only
one of which is metallic, an annular projection of quad
rilateral shape on and integral with the core element, the
the connection between the core A and the ?ange B.
After having removed the ring 62, the half-bushes 50
and 52 can be disengaged from base plate 60, and the
projection including a ridge extending perpendicularly
bobbin can be removed. The bobbin is then subjected to
from said core element in a radially outwardly direction,
?nishing operations.
Thus, for instance, the sides of 15 a plurality of teeth on said projection and extending
radially with respect to the core element, said ?ange
?anges B are turned and burnished, while the plugs C are
element being provided with indentations for accommo
anchored to core A by internings 28.
dating said teeth, said ?ange element having a face which
In FIGS. 3 to 6 there is shown a modi?ed embodiment
is coplanar with said ridge with the teeth in said indenta
of the bobbin, wherein similar or equivalent compo
20 tions, said core element including an outwardly ?aring
nents are given the same reference designations.
end which de?nes a space with said projection, said ?ange
In the embodiment in FIGS. 3-6, the core A near its
element having a shape corresponding to that of said
space and extending therein with said teeth engaged in
said indentations so that said ?ange element is prevented
ends is formed with projecting ridges 30‘, the inside walls
thereof ‘being substantially normal to the axis of core A.
Both ends 32 of said core are knurled, as shown in
from moving relative to said core element.
3. A bobbin as claimed in claim 2 comprising a
FIG. 4. As in the embodiments in FIGS. 1 and 2, the
ends of the core A are ?anged and engage the wall of a
resilient plug in the tubular core element, said plug urging
seat 180, formed on the ?anges B.
said core element into contact with said ?ange element to
According to the invention, the upper ends of the
lock said elements together.
peripheral projections 30‘ are formed with radial, or sub
4. A bobbin as claimed in claim 2 wherein said projec
stantially radial serrations 34, adapted to mesh with a 30
tion includes a further ridge facing said ?aring end of
similar, complemental serration 36, formed on a portion
the core element, said further ridge being inclined with
of the bore of each ?ange B.
respect to said core element so that said space is diver
The above construction prevents, in a simple and e?‘i
gent radially outwardly.
cient manner, the yarn from being caught; in the ?ssure
5. A bobbin as claimed in claim 2 wherein said out
formed (as a consequence of the pressure exerted by the 35
wardly ?aring end of the core element is knurled to pro
yarn wound on the bobbin) between the ?ange B and
vide increased resistance to relative movement between
the core A. In the embodiment of FIG. 4, when the
said ?ange element and said core element.
?ange B is de?ected, a discontinuous or zigzag ?ssure is
6. A bobbin as claimed in‘claim 3 wherein said plug
formed between the ?ange and the core A, due to the
presence of radial serrations 34 and 36, which prevents 40 is normally larger than the tubular core element, said
plug being compressed in said tubular core element
the yarn from entering into the ?ssure, even when they
whereby said plug exerts radial forces on said tubular core
are pressed against the ?ssure by the superposed yarn
7. A bobbin as claimed in claim 2 wherein said ?ange
The above bobbin is manufactured in like manner as
element is wood.
the bobbin illustrated in the FIGS. 1 and 2.
8. A bobbin as claimed in claim 2, wherein the core
It is to be understood that modi?cation and changes
element has opposite ends and a ?ange element is at each
may be made in the embodiments described, particularly
with regard to the manner in which the ?anges are secured
9. A bobbin as claimed in claim 2, wherein said teeth
to the core.
Similarly, changes might be made in the form and ar 50 are of triangular shape.
rangement of the serrations without departing from the
References Cited in the ?le of this patent
spirit of the appended claims.
What I claim is:
1. A bobbin comprising a tubular core element, a
?ange element having an opening and encircling the core
element, only one of said elements being metallic, said
?ange element having an inner and outer face, an annu
lar projection on and integral with the core element and
extending radially outwardly thereof, said projection in
cluding an inner ridge extending perpendicularly from
said core element radially outwardly, a plurality of teeth
on said projection extending radially outward therefrom,
said ?ange element being provided with indentations for
accommodating said teeth, the inner face of said ?ange
Wood _______________ __ Sept. 8, 1908
Oliver ______________ __ Ian. 29, 1929
Jones ________________ _- Jan. 5, 1932
Mills _______________ __ Dec. 27, 1932
Beck ________________ __ May 7, 1935
Italy _______________ __ Nov. 19, 1954
Great Britain ________ __ June 19, 1957
France _______________ __ May 5, 1958
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