US2381870A - Spool or bobbin for supporting yarn, thread, cord, or the like - Google Patents

Description

1945' ,H. L AMRHEIN ETAL Q 2,381,870 I SPOOL OR BOBBIN FOR SUPPORTING YARNS, THREADS, CORDS, OR THE LIKE 1 Filed June 22, 1944 ziuwuwlfiaj M Eek Patented Aug. 14, 1945 SPOOL on BOBBIN FOR. SUPPORTING YARN, THREAD, com), on THE LIKE HaraldL. Amrhein and Henry J. Feeley, Woonsocket, R.I., assignors to American Paper Tube Company, Woonsocket, R. I., a

Rhode Island corporation of Application June 22, 1944, Serial No. 541,509

6 Claims.

1 This application is a continuation-impart of United States application, Serial No. 500,224, for

improvements in textilebobbins and methods forproducing same, filed August 27, 1943.

The present invention relates to improvements in spools or bobbins for supporting yarn, thread,

axially-extendingbarrels with heads or flanges at their opposite ends. While as herein shown the spool is provided with heads or flanges of substantial diameter, it is to be understood that such parts of the assembly may take other forms,

for examplayarious shapes as usually employed cord or'the like. for use intex'tile machines and to a method of producing the same. One object ofthe invention is to provide a lightweightspool or similar yarn-support of simple construction having smooth exterior surfaces,

not subject to splitting, splintering, cracking or becoming dented or roughened and more durable inus'e'th'an wooden or other spools previously used for like purposes.

' Another object is to provide a spool or bobbin of the type indicatedcomprising a tubular paper I or fiber barrel with molded plastic heads or 'pletely surrounded by the-plastic material of the heads or flanges.

Another object is to provide a spool or bobbin of the type indicated in which theheads or-flanges are rigidly secured to the ends .of the barrel to preventthemv from turning thereon or becoming displaced longitudinally thereof.

7 .Another object is'to provide a method of molding the plastic heads or flanges on the ends of the 'barrel of the spool or bobbin to secure a rigid permanent joinder. therewith.

for different types of cop-tubes, bobbins and the like used in textile apparatus. I

Referring tothe present drawing, Fig. 1 illustrates a spoolsuch as used for containing tirecord during the winding of the material thereon Further objects of the invention areset forth one end of the spool; and

Fig. 3 is a similar plan view of the'head at the opposite endof the spool. The: present invention relates generally to spools, bobbins and the like comprising tubular latter are prepared in the and delivering it therefrom in various processes in the manufacture or use of the material. The spool or bobbin. may comprise a tubular barrel 2 of relatively extended length with disk-like flanges at its opposite ends. The barrel 2 of. the spool is preferably constructed of fiber or layers of paper cemented together in superimposed relationship with the heads or flanges of plastic material molded around the terminal portions of the barrel. As herein shown, one of 'the plastic heads may consist in a relatively thin disk i having a rounded peripheral rim and an integral bushing or thimble5 molded within the cylindrical wall of the tube 2. The opposite head or flange 8 may be in the form of a disk of somewhat thicker cross-section terminating in a cylindrical periphery and having an integral bushing or thimble 9 molded within the interior of the barrel 2. The outer end of the flange 8 may be provided with a diametrical slot or recess M for receiving a key or spline projecting from the spindle or shaft on which the tube is mounted to connect the spool for rotation therewith. In order to permanently secure the opposite plastic heads to the ends of the tubular barrel 2, the terminal portions of the manner as next explained. v I i Each end of the tubular barrel 2 is scored or indented to form an annular groove H) which may be of arcuate shape in cross-section or of other contour. Outwardly beyond the groove II! at each end of the barrel 2 its terminal portion is expanded slightly as shown at i I to provide a sharpedged fin projecting radially beyond the periphery of the barrel. The opposite ends of the barrel 2 are preferably'further provided with shallow* cuts or notches I2, usually four in number spaced forming both heads may comprise complemen- A tary parts having cavities in their walls shaped to enclose the barrel 2 of the spool and to conform to the contour of the heads to be produced. With a spool of the type shown in the present drawing, a cylindrical spindle may be used .as an insert. in the mold extending. axially through its cavity and of a diameter corresponding to that of the bores to be formed in the bushings or thimbles 5 and 9 at its ends. Relatively thin plugs or washers 15 may be inserted within the ends of the tubular barrel 2 at points adapted to confine the flow of the plastic material constituting the bushings 5 and 9 whereof to form the latter with flat ends. If preferred, relatively short spindles 01' cores may be provided projecting into the ends of the cavity of the mold to form the bores in the bushings 5 and .9 without requiring a spindle or insert extending throughout the whole length of the molds.

With the tubular barrel 2 held in the cavity of the mold and properly lo-cated longitudinally thereof the plastic material may be injected into the mold at opposite points and caused to flow into the cavities thereof to shape the end heads in accordance with anyparticular contour desired. The molding process is practiced by closing the parts of the moldtogether in the usuai manner and forcing the plastic material into its cavities by the use of rams or pistons as usually provided with molds of this type. The plastic material may be either in fluid or powdered form and under the action of heat andpressure it will be plasticized and forced into the cavities in the mold while being caused to flow around the end of the tubular barrel 2' to cernpletely fill the grooves H) and enter the interior of the barrel surrounding the cores or mandrels' projecting axially thereof. The expanded terminal portions of the tube will thus be embedded in and completely enclosed by the plastic material. The: plastic material will also flow into" the notches I 2: at. each end of the: barrel 2-, thus, when cured, serving to key or look the heads from turning thereon. lit. will be noted by reference to the drawing that the plastic material completely surrounds the terminal portions of the tubular barrel 2,. both as regards its outer and inner periphery and the raw edges of the paper or fibrous material thereof. In way a secure and substantially permanent bond is made: between the heads and the barrel of the spool, the heads being prevented from turning on the barrel .by the plastic material engaging in the notches L2: and also from becoming distplaced axially there-oi due to the: binding: oi the plastic material in the grooves l0 and across the edges of the terminal portions or the barrel- The plastic heads at opposite ends of the tubular barrel 2 completely surround the terminal portions oi the barrel to form a bond therewith while at the same time providing bushings within its interior formed with axially alinedv bores. for supporting the spool on a. shaft or spindle. When cured, the plastic material is of dense structure, but nevertheless somewhat re silient so that if the spool is subjected to rough handling, dropped on a cement floor or brought into. contact with adjacent objects it will resist, severe impact without splitting, chipping, splintering, or denting as is the case with spools having wooden heads or flanges. Furthermore, all exterior portions of the improved spool; present:

a smooth surface for the yarn, thread, cord or other textile material wound thereon to insure against abrading' or catching the strand or strands when they are unwound therefrom. The bores in the bushings 5 and 9 at the ends of the spool provide smooth bearings for mounting the spool on a shaft or spindle and as a most important feature, these bores are disposed exactly concentric with the exterior of the tubular barrel and heads of the spool so that it will not run out when rotated with or on the spindle oi the machine with which it is used.

It will be observed from the foregoing specificati orr that the present invention provides an improved method of producing spools or bobbins of improved construction, relatively light in weight, economical to manufacture and possessing. maximum. resistance to splitting, chipping, denting. o1" marring whereof to insure greater durability thereof under hard use. The heads at the ends of the barrel being constructed of thermosetting plastic or other vulcanizable material molded directly on and firmly bonded to the fibrous material of the barrel provide an extremely strong and permanent structure, proof against injury under continuous use.

By molding the plastic material directly onto the fiber barrel the present method of producing the improved article may be practiced without especial skill or expertness while resulting in greater accuracy in forming the head's and bushings concentrically of the axis of the barrel. While the improvements are herein shown as applied to a spool of particular type, it is to be understood that the shape and dimensions of the heads of the spool may be varied and other changes made in the form and structure of the spool, for example, it may have a solid barrel, without departing from the spirit or scope of the invention. Therefore, without limiting ourselves in this respect, we claim:

1. A spool or bobbin of the type indicated com-- prising a tubular fiber barrel having an annular groove on its periphery adjacent its end, and a head formed of plastic material molded around the terminal portion of the barrel and filling the groove therein, said head having an integral thimble portion projecting into the interior of the barrel and provided with an axial bore extending therethrough.

2. A spool or bob-bin of the type indicated comprising a tubular barrel having a peripheral groove adjacent its end and notches spaced around its terminal portion, and a head of plastic material molded around the end of the barrel and projecting. radially outward beyond its periphery, said head having an integral thi-mble portion molded within the interior of the barrel and formed with an axial boreextending therethrough.

3. A spool or bobbin oi. the type indicated comprising a tubular fiber barrel formed with peripheral grooves. adjacent its ends with the terminal portions of. the barrel expanded radially outward, and heads molded from plastic material with portions projecting; radially outward from the periphery of the barrel and other portions projecting. within the interior of the barrel to formbushings with axial bores! extending therethrough, the terminal portions of the barrel being completely embedded in and surrounded on all sides by the plastic material of the heads to form a permanent bond therewith.

The method: of producing. spools or bobbins consisting in taking a tubular barrel of fibrous material, forming a peripheral groove adjacent an end: thereof and molding. a head of plastic material around said end of the barrel while causing said material to flow into the end of the barrel and line its interior whereby'to' completely embed the terminal portion of the barrel within the plastic material surrounding it on all sides and with said plastic material projecting into the peripheral groove at the end of the barrel. v y

5. A method of manufacturing spools or bobbins comprising forming a tubular barrel by winding a sheet of fibrous material about a mandrel and cementing the superimposed layers together with an adhesive, forming an annular groove on the periphery of the barrel adjacent its end, forming notches in the end of the barrel spaced therearound, and molding plastic material around the end of the barrel to embed the terminal portion thereof in the'plastic material enclosing it on all sides and cause it to flow into the notches and peripheral groove therein.

6.v A method of manufacturing spools or bob- 5 bins consisting in taking a tubular barrel, form-

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