US3765274A - Dressmaker chalk sharpener - Google Patents

Abstract

A device for sharpening a tailor''s chalk is formed from a unitary sheet having a longitudinal medial slot terminating at one or both ends in side edges converging to a sharp apex and includes a flat horizontal base panel and a first vertical panel between the ends of the base panel and a second panel extending between the top of the first panel and either the bottom of the first panel or an end edge of the base panel. The first panel has a vertical slot extending from its top edge and terminating in side edges terminating in an apex at the base panel. The second panel is either flat and superimposed on and similar to the first panel or an inclined slotted panel extending between the first panel top edge and the base panel end edge or of angular configuration including a horizontal slotted top section and a vertical end section joining the base panel end edge.

Description

nited States Patent [191 Pisciotta DRESSMAKER CHALK SHARPENER [76] Inventor: Immacolata Pisciotta, 2387 Morris Ave., Bronx, N.Y. 10468 [22] Filed: July 7, 1971 [21] Appl. No.: 160,325

[52] US. Cl. 76/82 R, 145/3.4 R, 30/171 R [51] Int. Cl B21k 5/12, B26b 23/00 [58] Field of Search 76/82, 82.2, 88; 30/169, 171,172; 145/1, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 6.1, 6.2

[56] References Cited UNITED STATES PATENTS 1,652,583 12/1927 Sato l45/3.4 458,032 8/1891 Lovett..... l45/3.4 2,559,273 7/l951 Brinkley.. 76/88 517,922 4/l894 Hay l45/3.3 849,399 4/1907 Idov l45/3.3 378,117 2/1888 Stafford 143/34 1,593,168 7/1926 Gabauer 76/82.2 2,094,494 9/1937 Rago l45/3.3

[ Oct. 16, 1973 Primary Examiner-Harrison L. Hinson Attorney-Howard C. Miskin [5 7] ABSTRACT A device for sharpening a tailors chalk is formed from a unitary sheet having a longitudinal medial slot terminating at one or both ends in side edges converging to a sharp apex and includes a flat horizontal base panel and a first vertical panel between the ends of the base panel and a second panel extending between the top of the first panel and either the bottom of the first panel or an end edge of the base panel. The first panel has a vertical slot extending from its top edge and terminating in side edges terminating in an apex at the base panel. The second panel is either flat and superimposed on and similar to the first panel or an inclined slotted panel extending between the first panel top edge and the base panel end edge or of angular configuration including a horizontal slotted top section and a vertical end section joining the base panel end edge.

1 Claim, 8 Drawing Figures PMFNTFUHNIGIQTK 3.765274 sum 1 or 2 INVENTOR.

IMMACOLATA PISCIOTTA BYHWC ATTORNEY.

PATENIEDIIBI 151915 3,765274 smau 2 or 2 INVENTOR. IMMACOLATA PISCIOTTA DRESSMAKER CHALK SHARPENER BACKGROUND OF THE INVENTION The present invention relates generally to improvements in sharpening devices and it relates more particularly to an improved device for sharpening tailors or dressmakers chalks.

It is common practice in the fabrication and alteration of articles of wearing apparel to mark the article or the fabric from which the article is produced with a wax based tailors chalk to provide index points, guide lines and other information to assist in the proper construction of the garment. These chalks are generally of rectangular configuration with a longitudinal border which is tapered to a sharp line. With the use of the chalk, the sharp edge is flattened and dulled so that any marking therewith is unsatisfactory in that it is not a fine line, but coarse and dull. It is accordingly necessary to frequently sharpen the chalk marking edge and this is generally done by shaving the edge with a knife, a procedure which is awkward, inefficient, inaccurate and often dangerous, as well as producing messy shavings to clean. Numerous devices have been proposed for sharpening tailors chalks but these have been cumbersome, inconvenient and expensive and otherwise leave much to be desired.

SUMMARY OF THE INVENTION It is a principal object of the present invention to provide an improved sharpening device.

Another object of the present invention is to provide an improved device for sharpening tailors chalks.

Still another object of the present invention is to produce a chalk sharpening device characterized by its simplicity, ruggedness, versatility, ease and accuracy of use, and low cost; Y

The above and other objects of the present invention will become apparent from a reading of the following description taken in conjunction with the accompanying drawing which illustrates preferred embodiments thereof.

In a sense the present invention contemplates the provision of a chalk sharpening device integrally formed of a unitary sheet and comprising a base member, a first panel directed upwardly from said base member, and a second panel extending from the upper edge of said first panel to said base member, said panels having apertures formed therein delineating an open topped longitudinal passageway and a first of said apertures including a pair of downwardly converging side edges defining a chalk shaving and shaping section. The sheet forming the device preferrably has a medial slot terminating at one or both ends in side edges which converge to a respective medial apex. In one form, the first and second panels coincide and are joined at a top fold line and the base member is defined by coplanar wings directed perpendicularly from the bottom edges of the panels. According to another form of. the improved device the base member is a flat pane] and the first panel extends perpendicularly to the base pane] and terminates at its bottom in a flat panel superimposed on the base panel and extending to the end thereof. The second panel extends from the top edge of the first panel to the end of the base panel and is either inclined or includes an upper horizontal section and a vertical end section. The first panel opening has parallel vertical upper side edges and bottom edges which BRIEF DESCRIPTION OF THE DRAWING FIG. I is a perspective view of a sharpening device embodying the present invention, a chalk being illus trated by broken line in a sharpening position;

FIG. 2 is a perspective view of the blank employed in forming the device;

FIG. 3 is a perspective view of another embodiment I of the present invention;

FIG. 4 is a perspective view of the blank used in forming the device shown in FIG. 3;

FIG. 5 is a perspective view of further embodiment of the present invention;

FIG. 6 is a perspective view of the blank used in the forming device shown in FIG. 5;

FIG. 7 is a perspective view of still another embodiment of the present invention; and

FIG. 8 is a perspective view of the blank used in the forming device shown in FIG. 7.

Referring now to the drawing, and more particularly FIGS. 1 and 2 thereof which illustrate a preferred embodiment of the present invention, the reference numeral 10 generally designates the improved tailor's chalk sharpening device which is formed of a unitary flat blank 11. The blank 11 is of rectangular configuration with one end having its corners cut to provide oblique edges 12 and having a circular hole 13 located medially proximate the end edge. Hole 13 allows the device to be hung in any convenient place when not needed. A medial longitudinal slot 14 is located in blank 11 intermediate its ends and has parallel side edges 16 and oblique end edges 17 converging to sharp medially located apices l7 and is of a width slightly greater than the thickness of the conventional tailor's chalk. The blank 11 is formed of any suitable stiff material, which may be bent by conventional equipment and procedures, such as sheet metal, thermoplastic polymer resins, for example, nylon, polystyrene, high density polypropylene and the like.

In forming the sharpening device 10 from blank 11, the blank 11 is bent 180 about the medial transverse axis of slot 14 along a fold line 19 and opposite end blank sections are bent outwardly about transverse axes through apices 18, along fold lines 20. The sharpening device 10 includes a pair of vertical superimposed coinciding rectangular panels 21 and 22 respectively and delineated by fold lines 19 and 20 and joined along fold line 19. Depending from the fold line 19 are the coinciding chalk sharpening or shaving apertures 23 which include upper parallel vertical edges 25 formed from side edges 16 of slot 14, and lower edges 26 which converge downwardly to medial sharp apices 27 at fold lines 20, which is formed from superimposed apices 18 of slot 14. A pair of oppositely directed coplanar, horizontal base members defining wings 28 extend from the bottom edges of panels 21 and 22 and are delineated therefrom by fold lines 20. The base member and panels may be imprinted with information or decorated as desired.

In employing the improved sharpening device 10, the dull tailors chalk C is pressed downwardly into the sharpening opening 23 with its bottom longitudinal marking edge bottommost and is slid longitudinally back and forth while being pressed downwardly so that the bottom border of chalk C is shaved by converging edges 26 until it is brought to a sharp edge mating apex 26, at which point to bottom edge of chalk C is in its optimum sharpened condition. The chalk C is shaved by edges 26 as it is moved both forwardly and rearwardly and it is guided and maintained in its optimum sharpening position by vertical side edges 25 and base member 28.

The sharpening device 32 illustrated in FIGS. 3 and 4, like sharpening device 10, is formed from a unitary blank 33 of relatively longer rectangular configuration than blank 11 and having an elongated medial slot 36 having at one end a transverse edge 37 and at the opposite end is provided with edges 38 convrging to a medial apex 37, and includes parallel elongated side edges 39.

In its completed assembled condition the sharpening device 32 includes a horizontal base panel 40 and a transverse vertical first panel 41 perpendicular to base panel 40 between the ends thereof and terminating in a rectangular panel 42 superimposed on base panel 40 and extending to an end edge thereof. A vertical medial slot 43 is located in panel 41 and includes parallel side edges defined by sections of slot side edges 39 and converging bottom edges 38 terminating in apex 37 at bottom fold line 45 which with top fold line 44 delineates first panel 41. An inclined second panel 46 extends between and is integrally formed with the top edge of first panel 41 and the end edge of base panel 40 and overlies panel 42. Second panel 46 is divided by slot 36 into opposite sections defining a passageway with slot 43 for guiding the tailors chalk being sharpened.

The sharpening device 32 is employed in the same manner as sharpening device described above except that the passageway defined by slot side edges 39 in panel 46 function as a chalk guide.

Referring now to FIGS. 5 and 6 which illustrate another embodiment of the present invention, the improved sharpening device 47 is formed of a blank 48 which differs from blank 33 primarily in that the opposite ends of the medial slot are provided with end edges which converge to opposite medial apices. Sharpening device 47 includes a horizontal base panel 49 terminating at its front edge in a vertical panel 50 delineated therefrom by a transverse fold line. Extending rearwardly from the top edge of panel 50 and delineated therefrom by a transverse fold line is a horizontal panel 51 which is approximately half the length of base panel 49 and is joined at its rear edge to a depending vertical panel 52. Extending forwardly from the bottom edge of panel 52 to panel 50 and directly superimposed on base panel 49 is a rectangular panel 53.

Formed in panels 50 and 52 and in longitudinal alignment are a pair of vertical medial slots 54 each including a pair of upper vertical side edges 56 and inclined converging edges 57 terminating in an apex 58 at about the level of the top face of panel 53. A medial slot 59 is formed in top panel 51 and has parallel side edges 60 joining vertical edges 56.

A tailors chalk may be sharpened by device 47 in the manner earlier described, the side edges 56 and 60 functioning as chalk guides and the inclined edges 57 effecting the shaving of the chalk marking edge. The sharpening stroke of the tailors chalk is less than with the use of the earlier described sharpening devices by reason of the provision of the longitudinally spaced shaving sections defined by panels and 52. lt should be noted that the distance between panels 50 and 52 is advantageously less than one-half the length of the conventional tailors chalk.

Referring now to FIGS. 7 and 8, which illustrate a still further embodiment of the present invention, the improved sharpening device 70 is formed ofa blank 72, which differs from blank 48 primarily in that it is longer and that the medial slot is closer to one end of the blank and is open at that said edge. In other words, the medial slot is open at one end. Sharpening device 70 is formed from blank 72 having a horizontal base panel 74 with an elongated medial slot 76 having at one end edges 78 converging to a medial apex 80, and includes parallel elongated side edges 81. Medial slot 76 has its other end open along transverse edge 82 forming spaced longitudinally extending legs 84.

In forming sharpening device 70 from blank 72, portion 85 of blank 72 is bent 180 about a transverse fold line 86, so as to abut the opposite surface of base 74. Base panel 74 terminates against a pair of vertical, superimposed, coinciding rectangular panels 87 and 88 formed by folding the remaining portion of the panel 72 along fold line 90 passing through apex 80, and then 180 along fold line 92 and then 90 along fold line 9].

1 Rectangular panels 87 and 88 are delineated by fold lines 90 and 92 and 91 and 92 respectively joined along fold lines 92. Depending from fold lines 92 are the coinciding chalk or shaving aperture 93 which includes upper parallel edges 94 formed from side edges 81 of slot 76 and lower edges 96 which converge downwardly to a medial sharp apex 98 at fold line 90 which is formed from apex of slot 76. A pair of outwardly directed horizontal base members 75 extend from the bottom edge of panel 88 and are delineated therefrom by fold line 91. These base members are formed from legs 84 of the panel 72.

The tailors chalk may be sharpened by device 70 in the manner earlier described, the side edges of the passageway 100 are formed from side walls 81 of medial slot 76 with the side edges 94 providing a chalk guide with the inclined edges 96 effecting the shaving of the chalk marking edge. Advantageously, the lower portion of the blank is affixed in some manner to base 74 such as by adhesive of some type, staples or the like.

In all of the embodiments discussed above, the sharpening apices should be flush with the base, so that there is no lip or ledge formed which would tend to dull the edge being sharpened. Also, the shavings of the chalk are collected on the base and can be readily disposed of cleanly, so that the shavings do not fall on the floor.

While there have been described and illustrated preferred embodiments of the present invention, it is apparent that numerous alterations, omissions and additions may be made without departing from the spirit thereof.

What I claim is:

l. A chalk sharpening device integrally formed of a unitary sheet and comprising a horizontal flat base panel having a transverse front end edge, a first panel extending vertically from said base panel front edge and terminating in a transverse top edge, a second side edges depending from the top edges of said first and third panels and terminating at their bottoms in downwardly converging side edges defining chalk shaving and shaping sections, and said second panel having a longitudinal slot formed therein extending the full length of said second panel and having side edges joining corresponding vertical side edges of said slots in said first and third panels.

Claims (1)

1. A chalk sharpening device integrally formed of a unitary sheet and comprising a horizontal flat base panel having a transverse front end edge, a first panel extending vertically from said base panel front edge and terminating in a transverse top edge, a second panel extending horizontally rearwardly from said first panel top edge and terminating in a transverse rear edge, a third panel depending from said second panel rear edge to said base panel and having a bottom transverse edge and a fourth panel extending forwardly from said third panel bottom edge to said first panel and being superimposed on said base panel, said first and third panels having similar slots formed therein, each of said slots including transversely spaced parallel vertical side edges depending from the top edges of said first and third panels and terminating at their bottoms in downwardly converging side edges defining chalk shaving and shaping sections, and said second panel having a longitudinal slot formed therein extending the full length of said second panel and having side edges joining corresponding vertical side edges of saId slots in said first and third panels.

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