US2759545A - Tape cutting attachment device for adhesive tape rolls - Google Patents

Description

Aug. 21, 1956' RIZZA 2,759,545

TAPE CUTTING ATTACHMENT DEV-ICE FOR ADHESIVE} TAPE ROLLS Filed Aug. 18, 1954 I T 3rmentor FRANK E. RIZZA Ci Heme g2 United States Patent 7 TAPE CUTTING ATTACHMENT DEVICE FOR ADHESIVE TAPE ROLLS Frank E. Rizza, Milford, Conn.

Application August 18, 1954, Serial No. 450,684

Claims. (Cl. 16448.5)

The present invention relates to a tape cutting attachment device for adhesive tape rolls, and is acontinuationin-part of'my application for Dispenser for. Adhesive Tape, Serial No. 295,419, filed June 25, 1952, now Patent. No. 2,699,251.

An object of the invention is toprovidea tape cutting attachment device of simple and inexpensive construction, preferably formed of molded-plastic material, and whichmay be conveniently attached to the standard commercial type spool of adhesive tape to provide a support for the spool about which the latter may be rotated to unwind a'length of tape. It is further proposed to provide such device having a straight cutting edge disposed at one side of the spool tangential to a circle concentric to and of greater diameter than the spool, to the'end that a length of tape to be severed, after being drawn from the spool by rotating the latter about the attachment device, may be disposed transversely across the cutting edge sothat it may be effectually severed along a line transverse to the length of tape and parallel'to thetransverse strands of the woven cloth base of the tape, thus permitting a clean severance of the tape without producing ravels.

A further object is to provide a tape. cutting: attachment device which will not interfere with the normalengagement and disengagement of the drumclosure' orcasing usually provided upon the standard commercial type tape spool..

A further object is to provide an attachment whichis adjustable for attachment to spools. of varying widths, thus enabling the same attachment to be employed with spools containing narrow and wide tapes, aswell as spools containing a plurality of tapes of dii'ierentwidths.

In connection with the use of the attachment with spools containing tapes of different widths,.it is a further object of the invention to provide an attachment whichmay be interchangeably engaged at either side. of the spool, so as to dispose the cutting edge adjacent either of the plurality of tapes carried by the spool.

Other objects and advantages of the invention will-become apparent from a considerationof the followingde- I tailed description taken in connection with the accompanying drawing wherein a satisfactory embodiment of themvention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scopeof the appended claims.

In the drawing:

Fig, 1 is a perspective view of the tape cutting. attachment device according to the illustrated exemplary embodiment of the invention, the two parts thereof being shown in separated relation;

Fig. 2 is a perspective view of a standard commercial type spool of tape having the closure drum or casing engaged therewith;

Fig. 3 is a side elevation of the attachment device se- 2,759,545 Patented Aug. 21, 1 956 ice cured to aspool of tape with the covering drum or casing in place .thereon;

Fig, 4 is a vertical sectional view taken along the line 4-4 of Fig. 3;

Fig. 5 is. a top plan view with the closure drum or casing removed, and showing the position of the lengthof tape disposed across the cutting edge and. aboutto be severed, the dotted lines indicating the position of the hand holdingthe device and the hand holding thelength of tape to be severed;

Fig. 6 is a sectional view similar to Fig, 4 and showing the attachment device securedto a spool of greater width than the spool illustrated in Fig. 4, the particular spool shown having two different width rolls of tape carried thereby; and

Fig. 7 is a fragmentary side elevation of a modified form of i the invention.

Similar reference characters indicate corresponding parts throughout the several figures of the drawing.

Referring to the drawing, the spool of tape to which the. cutting attachment device of the invention is adapted to-beattached, is of the standard commercial type. and comprises a-cylindrical hubiti having a pairof circular side flanges. 11-11 secured thereon adjacent its, ends, theseflanges being in the form of centrally apertured discs having their inner peripheral edges flared outwardly as-at 12 and secured within a curled bead 13 at each endof'the hub, the outer peripheral edge of each of the flangeshaving an outwardly disposed curled bead, 14. The roll of tape 15 is wound about the hub and is nonrotatable thereon by virtue of. the factthat the adhesive side of the. innermost winding of the tape is adhered to the hub. 10. Thus, in order to unwind a length of. tape it is'necessary to rotate the entire spool and this sometimesprovesawkward, in view of the factthatthe spool is being' rotated while held in the hand and is.very; apt to be accidentally dropped. This disadvantage in unwinding the; tape is mentioned at this pointin viewv of the advantage of the present invention in rotatably mounting the Spool upon the attachment device, which latter may befirmly held-in the hand-as the tape. is unwound and the. spool. rotated, as will presently more fully appear.

A: closure. drum or casing. 16 is detachably engaged aboutthe spool and is providedwith outwardly. disposed curled beads 17.-17 at its edges which, in the engaged position, are disposed slightly outwardly of the beads..14:of the spool. The. drum is provided upon itsinner. surface at. suitablepointswi-th inwardly pressed bosses or lugs 18, which, in-the engaged position, are-disposed adjacent the inner sides of the respective flanges 114-11. The drum: has a slight. clearance with respect to the outer periphery of the spool, which, combined with its slight resilience, permits the bosses 18 to be snappedover the periphery: of the flange 11 to engage or dis-engage the drum;

The:tape cutting attachment device of the invention comprisesa cutter member. 19 consisting of a. generally circular disc-like flange portion 20 provided centrally with a. cylindrical. hub 21 having a series of. annular axially spaced: grooves 22 formed. upon its outer surface, this hub adapted to be telescopically engaged by a retaining member 23' consisting of a circular flange portion 24 having a; cylindrical hub 25, the inside diameter of. which is such as to be slidably engaged upon the hub 21.. The length. of. the. hub 25. substantially corresponds. to: the length; ofthe. hub 21. so that in the fully engagedposition, as showninFig; 4, the. end of. thehub ZS will engage the inner surface of the flange 20 and the end of the hub 21 will engage an inwardly extending annular abutment portion 26 of the flange 24.

The hub 25 is slightly resilient and for this purpose is provided with suitably spaced longitudinal slots 27,

and between these slots at points adjacent the outer end of the hub there are provided upon its inner surface a plurality of projecting bosses 28 which are adapted to snap into the annular grooves 22 of the hub 21., the particular groove engaged by these bosses determining the axial spacing between the flange 20 and the flange 24.

The flange portion 26 is provided with a straight cutting edge 29, preferably of sharp toothed form, extended as a cord between two spaced points of the peripheral edge of the flange portion. As shown in the modification in Fig. 7, the cutting edge may be slightly downwardly offset to provide shoulders 3ti?t at the ends of the cutting edge, so that when the tape to be severed is positioned upon the cutting edge it will be prevented from slipping off of the cutting edge in the event that it is not held with sufficient firmness.

In operation, the closure drum 16 is removed, as shown in Fig. 5, and a length of tape to be severed is drawn from the roll by gripping the flange member 20 so that the spool is free to rotate about the hub (formed by the telescoping hub portions 21 and 25), as the tape is unwound, the free rotation of the spool permitting the tape to be pulled off of the roll at a point in proximity to the cutting edge.

The thumb of the hand holding the tape spool is pressed against the tape at the inner side of the cutting edge so that it may be firmly held against the inner side of the flange 20, and thereupon the length of tape gripped by the other hand may be readily severed across the cutting edge. By arranging the direction of winding of the tape in relation to the cutting edge such that the non-sticky side will engage the cutting edge, the adhesive upon the tape is prevented from packing into the cutting edge teeth and also the end of the tape at the inner side of the cutting edge is free to be readily reengaged about the tape roll.

The cutter member 19 may be disposed at either side of the tape spool, as desired, for the more convenient operation of the device by right or left handed users.

In Fig. 6 there is illustrated a tape spool of suflicient width to accommodate two tape rolls 15-15 of diflerent width, the telescoping hub portions 21 and 25 of the attachment device being extended to fit the wide tape spool.

What is claimed is:

1. In a cutting device for tape rolls, a hub for rotatably receiving a tape roll, a flange part connected to an end of said hub and extending radially for disposition at one side of said tape roll and having a radially outwardly disposed tape cutting sharpened edge extending along a straight line tangential to a circle concentric to said hub, a drawn length of tape from said roll adapted to be placed over said cutting edge with a straight transverse line of said tape in engagement therewith for severing along said straight transverse line.

2. The invention as defined in claim 1, wherein said cutting edge is substantially in the central plane of said flange part.

3. The invention as defined in claim 1, wherein said flange part is of generally circular form with said cutting edge extending along a straight line cord between spaced points of its periphery, the periphery of said flange part extending from one end of said cutting edge about said flange to the other end of said cutting edge being a continuously circumferential edge free of cutting sharpness.

4. The invention as defined in claim 1, further characterized by abutment shoulders at each end of said cutting edge.

5. The invention as defined in claim 1, further characterized by retaining means connected to the other end of said hub to retain said tape roll thereon.

6. In a cutting device for tape rolls, a hub for rotatably receiving a tape roll and comprising a pair of telescoping hub parts, a flange part connected to the outer end of one of said hub parts and extending radially for disposition at one side of said tape roll, and a tape roll retaining flange part connected to the outer end of the other of said hub parts, said first flange part having a radially outwardly disposed tape cutting sharpened edge extending along a straight line tangential to a circle concentric to said hub, a drawn length of tape from said roll adapted to be placed over said cutting edge with a straight transverse line of said tape in engagement therewith for severing along said straight transverse line.

7. The invention as defined in claim 6, further characterized by releasable means for securing said telescoping hub parts in. a plurality of axially adjusted positions.

8. In a tape cutting attachment device for a tape dispenser of the type having a tubular hub and a pair of parallel flanges rigidly joined to the respective ends thereof, a hub for rotatably engaging within the tubular hub of said dispenser, a flange part connected to an end of said hub and extending radially for disposition at one side of one of said parallel flanges, and having a radially outwardly disposed tape cutting sharpened edge extending along a straight line tangential to a circle concentric to said hub, a drawn length of tape from said roll adapted to be placed over said cutting edge with a straight transverse line of said tape in engagement therewith for severing along said straight transverse line.

9. In a tape cutting attachment device for a tape dispenser of the type having a tubular hub, a roll of adhesive tape non-rotatably mounted on said tubular hub, and a pair of parallel flanges rigidly joined to the respective ends of said tubular hub, a hub for rotatably engaging within the tubular hub of said dispenser and comprising a pair of telescoping parts, flanges respectively connected to the outer ends of said hub parts, and extending radially for disposition at one side of one of said flanges of said dispenser, at least one of the said flanges having a radially outwardly disposed tape cutting sharpened edge extending along a straight line tangential to a circle concentric to said hub, a drawn length of tape from the said roll adapted to be placed over said cutting edge with a straight transverse line of said tape in engagement therewith for severing along said straight transverse line.

10. In a tape cutting attachment device for a tape dispenser of the type having a tubular hub, a pair of rolls of adhesive tape non-rotatably mounted on said tubular hub, and a pair of parallel flanges rigidly joined to the respective ends of said tubular hub, one of said tape rolls being adjacent each of the said flanges, a hub for rotatably engaging within the tubular hub of said dispenser and comprising a pair of telescoping parts, flanges connected to the outer ends of the said hub parts and extending radially for disposition at one side of each of the said parallel flanges of said dispenser, at least one of the said flange having a radially outwardly disposed tape cutting sharpened edge extending along a straight line tangential to a circle concentric to said hub, a drawn length of tape from the said roll adjacent said flange adapted to be placed over said cutting edge with a straight transverse line of said tape in engagement therewith for severing along said straight transverse line.

References Cited in the file of this patent UNITED STATES PATENTS 1,431,674 MacGill Oct. 10, 1922 2,082,546 Machate et al June 1, 1937 2,132,950 Green Oct. 11, 1938

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