US3300153A

US3300153A - Bobbin insert

Info

Publication number: US3300153A
Application number: US417271A
Authority: US
Inventors: Joe D Fenn
Original assignee: Monsanto Co
Current assignee: Monsanto Co
Priority date: 1964-12-10
Filing date: 1964-12-10
Publication date: 1967-01-24
Anticipated expiration: 1984-01-24

Description

J. D. FENN BOBBIN INSERT Jan. 24, 1967 Filed Dec. 10, 1964 INVENTOR. JOE D. FENN AGENT 3,300,153 BOBBIN INSERT Joe D. Fenn, Atlanta, Ga., assignor to Monsanto Company, a corporation of Delaware Filed Dec. 10, 1964, Ser. No. 417,271

4 Claims. (Cl. 242-4621) This invention relates to an adapter for clutching a yarn holder on a spindle of a clutch device and, more particularly, relates to a plastic bobbin insert positionable within the bore of a bobbin.

In textile practice, bobbins are customarily locked on clutch devices by expandable screw or blade means attached to the upper end of a bobbin spindle and expanded against the inner wall of the bobbin. To mount a bobbin on a conventional spindle of the above type, it is necessary to axially align the bobbin above the spindle before lowering the bobbin over the spindle. Following this procedure the space above the spindle must be free of machinery and other equipment. This is a disadvantage where space is a critical consideration. In the use of bobbins of paper manufacture, conventional bobbin clutch devices also have a tendency to damage the inside of the bobbins or tubes.

It is an object of this invention to provide a bobbin insert adapted to permit angular mounting and removal of a bobbin from a spindle and to permit the space above the spindle to be utilized.

Another object is to provide a light, sturdy and resilient plastic bobbin insert.

Another object is to provide an integral, symmetrical and balanced bobbin insert imparting rotational stability and positive connection between bobbin and spindle.

Another object is to provide a bobbin-to-spindle insert particularly adapted for paper bobbins.

Accordingly, the bobbin insert embodying the invention comprises an integral, symmetrical, plastic spool having a central sleeve portion and oppositely disposed coaxial conical portions. The conical portions slope outwardly from the sleeve portion and are segmented and resilient. When the insert is positioned within a bobbin or tubular member of smaller bore size to be clutched, the slotted segments expand against and grip the bore of the tubular member.

The insert can be positioned at any desired point along the bore of a bobbin, may be disposable, is easily aligned when being mounted, and permits angular alignment and removal from a chuck spindle.

A better understanding of the novel bobbin insert will be gained by reference to the more detailed description which follows, and to the drawing. In the drawing:

FIGURE 1 is a perspective view of the bobbin insert embodying the invention; and

FIGURE 2 is an elevation view, partly in section, showing the insert being used in association with a bobbin and spindle, and further illustrating angular removal of the bobbin to pass aside of an obstruction.

Referring to FIG. 1 of the drawing, bobbin insert 1 has a central sleeve portion 2 with a bore 3 extending therethrough sized to mount tightly upon a spindle 4. Flaring outwardly from each end of the sleeve portion 2 are oppositely disposed conical portions 5 each arranged coaxial with the sleeve portion 2. Each conical portion 5 has a plurality of equidistant slots 6 arranged around the bases thereof providing a plurality of slotted resilient and springy segments 7. Banding the base of each cone 5 on the outer peripheral surface thereof, is a bobbin gripping surface 8 which is complementary to the inner bore wall of a bobbin 9.

The insert 1 is, preferably, unitary and constructed of light material. A superior insert is manufactured by United States Patent 0 3,300,153 Patented Jan. 24, 1967 'ice using a resilient thermoplastic material such as nylon, polyurethane, polyester, and the like. It is critical that the construction be symmetrical to provide balance and rotational stability.

FIGURE 2 illustrates the insert I mounted in a bobbin 9. Bobbin 9 is shown being mounted at an angle to circumvent a pair of textile rolls 10 positioned above the spindle 4 of a clutch device 11. The tapered inner surfaces of the conical portions 5 guide the end of spindle 4 into bore 3 of the central sleeve portion 2 for readily centering the bobbin. The gripping surfaces 8 of the resilient segmented portions 7 press against and grip the bore of bobbin 9 at spaced multiple points to effect a positive grip and to provide concentricity of rotating components during operation.

The plastic bobbin insert 1 is particularly adapted for use with paper tubes or bobbins because the plastic does not scar the tubes.

It will be understood that modifications and variations from the illustrated embodiment shown are contemplated within the spirit of the invention and the scope of the following claims.

I claim:

1. A bobbin-to-spindle adaptor comprising,

a central portion having a bore defined therethrough for mounting said insert in tight relation on a spindle, oppositely disposed coaxial, resilient end portions joined to respective ends of said central portion,

each of said end portions having conical inner guide surfaces joining with said defined bore and sloping outwardly therefrom,

a plurality of slot means extending inwardly from the outer edges of each of said end portions providing springy segments, and

a bobbin contacting surface formed around the outer edge of each of said end portions for engaging with and gripping the inner wall of a bobbin.

2. A bobbin-to-spindle adaptor as in claim 1, of unitary, symmetrical and plastic material construction.

3. A bobbin-to-spindle adaptor as in claim 1, wherein said plurality of slot means in a respective end portion are equidistantly spaced.

4. A bobbin-to-spindle adaptor comprising,

a sleeve portion defining a bore,

oppositely disposed hollow, conical portions each coaxially arranged with respective ends of said sleeve portion and each having a conical inner wall with the slope thereof increasing away from said sleeve portion,

a plurality of equispaced slots extending inwardly toward said sleeve portion from the ends of each of said conical portions forming resilient, springy segments,

a peripheral surface formed around the base of each of said conical portions for gripping a bobbin bore wall,

said adaptor being unitary, symmetrical, resilient, and

of plastic material construction.

References Cited by the Examiner UNITED STATES PATENTS 180,145 7/1876 Mayor 24246.21 2,879,010 3/1959 Crawford 2421l8.32 3,132,817 5/1964 Atwood et al 242-4621 FOREIGN PATENTS 307,920 12/ 1929 Great Britain.

STANLEY N. GILREATH, Primary Examiner.

Claims

1. A BOBBIN-TO-SPINDLE ADAPTOR COMPRISING, A CENTRAL PORTION HAVING A BORE DEFINED THERETHROUGH FOR MOUNTING SAID INSERT IN TIGHT RELATION ON A SPINDLE, OPPOSITELY DISPOSED COAXIAL, RESILIENT END PORTIONS JOINED TO RESPECTIVE ENDS OF SAID CENTRAL PORTION, EACH OF SAID END PORTIONS HAVING CONICAL INNER GUIDE SURFACES JOINING WITH SAID DEFINED BORE AND SLOPING OUTWARDLY THEREFROM, A PLURALITY OF SLOT MEANS EXTENDING INWARDLY FROM THE OUTER EDGES OF EACH OF SAID END PORTIONS PROVIDING SPRINGY SEGMENTS, AND A BOBBIN CONTACTING SURFACE FORMED AROUND THE OUTER EDGE OF EACH OF SAID END PORTIONS FOR ENGAGING WITH AND GRIPPING THE INNER WALL OF A BOBBIN.