US2876885A

US2876885A - Carbon roll

Info

Publication number: US2876885A
Application number: US470682A
Authority: US
Inventors: Lester K Fleischmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-11-23
Filing date: 1954-11-23
Publication date: 1959-03-10
Anticipated expiration: 1976-03-10

Description

March l0, 1959 L. K. FLEISCHMANN CARBON ROLL 2 Sheets-sheet 1 Filed Nov. 25. 1954 March 10, 1959 l.. KQFLEISCHMANN 2,876,885

CARBON ROLL Filed Nbv.

2 Sheets-Sheet 2 United St-afee Pefef "Office 'CARBON ROLL Lester K. Fleischmann, Chicago, Ill.

Application November 23, 1954, Serial No. 470,682

6 Claims. (Cl. 197-126) This invention relates to carbon rolls of the type adapted to be positioned on carbon holder mounting plates for use between adjacent strips of continuous-form stationery in a writing machine.

A number of carbon rolls have heretofore each been loosely supported upon a carbon holder between adjacent strips of continuous-form stationery with an unwound portion extending forwardly from each roll arou nd the platen of a writing machine in registry with the stationery. The carbon holder is generally mounted for longitudinal movement upon a forms carrying device which in turn is secured to the rear of a writing machine4 so that the forms carrying device can move laterally with the carriage of the writing machine during a typing operation. The inf termittent lateral movement of the forms carrying device has often caused the loosely supported carbon rolls to shift laterally out of alignment. Thus, when the unwound portions of the carbon being used are moved rearwardly for use between the next following form lengths of stationery, the carbons slide laterally out of alignment in following the misaligned carbon rolls. The typist must then realign the carbons before beginning the next typing operation. The present carbon roll structure eliminates this problem of lateral sliding in a carbon roll. 4

The primary object of the present invention is to provide a new and improved type of carbon roll and core.

Another object is to` provide a hollow core of predetermined uniform width for a carbon roll so as to make a snug t at its. opposite edges with a mounting plate of a carbon holder.

A further object is to provide a carbon roll having a hollow core of uniform width, the core having a pair of oppositely disposed, transversely extending lines of weakening to determine precisely the two lines of fold in its lateral surface.

Still another object is to provide a new and improved method of forming a hollow core of predetermined uniform width for a carbon roll.

The invention s illustrated in the preferred embodiment in the accompanying drawings, in which:

Fig. l is a broken perspective view showing the hollow core and a portion of the carbon strip;

Fig. 2, a sectional View taken as indicated on line 2-2 of Fig. 1;

Fig. 3, a sectional view taken as indicated on line 3-3 of Fig. 4;

Fig. 4, a plan view of the paper sheet from which the hollow core is formed;

Fig. 5, a broken pl-an view partly in section showing the carbon roll in position upon a mounting plate of a carbon roll;

Fig. 6, a sectional view taken as indicated on line 6-6 of Fig. and

Fig. 7, a sectional view taken as indicated on line 7-7 of Fig. 5.

In the embodiment illustrated, the carbon roll includes g a hollow, generally flat core member, generally desigand 11, the edges being substantially parallel to form a core of uniform width. Since it is desired that each of the lateral edges makes a snug tit with a mounting plate 12 of the type shown in Figs. 5 and 6, the width of theV core is made to conform to the particular mounting plate to be used.

As best seen in Fig. 4, the core 8 may be formed from a paper sheet, generally designated 13, of relatively durable material which is provided with a pair of parallel, transverse lines of weakening 14 and 15, respectively. The lines of weakening divide the sheet'13 into a pair of substantially

congruent sheet sections

16 and 17, re? spectively, and a third sheet section 18 at the end of the sheet 13. It is clear that perforated lines, score lines or any: other means for predetermining the position of fold in the sheet along a definite line could be used. The location of the lines of weakening 14 and 15 determine the width of the

sheet sections

16 and 17 and the ultimate width of the core member 8, as can be seen in Fig. 2. The third sheet section 18 may also be provided with a line of weakening 19 defining one side ofv an end ap 20 having one of its faces covered with a pressure sensitive adhesive 21. t

informing the core 8, the

sheet sections

16 and 18 at lopposite ends of the sheet 13 are folded inwardly on linesv of weakening 14 and 15 (sheet section 18I preferably on top) and secured together byadhesive 22. The resulting flat hollow core has an upper and a lower lateral surface, 8a andSb, respectively, of identical configuration so that the core has a uniform width. The lines of weakening 14 and 15, of course, occupy the fold lines at the closed, opposite edges of the core. Preferably the flap 20 at the free end of the sheet section 18 is left unsecured so that it may be folded back upon line of weakening 19.

To attach the carbon strip 9, an end of the strip isinserted beneath Hap 20, carbon side down, so that the back of the carbon strip 9 can be secured to the ap 20 by the adhesive 21. The desired length of carbon can then be wound upon the core 8. By attaching the extreme tip of'the'carbon strip 9 to the core 8, `very little of the car# bon is wasted. In addition, the carbon holder on which the carbon roll is mounted does not need any separate means for securing the carbon strip to the holder during a typing operation.

Since the core 8 is exible, it may be placed upon a mandrel for the winding operation. Mandrels having variously shaped cross sections have been used. Some are circular; others are oblate or rectangular. Generally when the carbon roll is removed from the mandrel after i will occupy less vertical space wh'enplaced between adjacent strips of continuous-form stationery.

A tab member 23 may be secured to an inner face of the hollow core, as by adhesive 24. It may be placed upon the sheet during the formation of the core 8, or it may be inserted into the hollow core after the core is formed. The tab member 23 is positioned so that an end portion extends outwardly of an end of the core 8. One face of this end portion is generally provided with APairneri Mar, 10,1959,

assess@ a spot of pressure sensitive adhesive 25 which is normally lcovered by the protective paper sheet 26 until it is desired to use the carbon roll. i

'Io place the carbon roll upon the mounting plate 1 2, an open end of the core is located by grasping the tab member 23 which is secured to the interiorr of the hollow core. The hollow core 8 is then pulled over the mounting plate 12 to the desired position, as shown by either of the scales 27 on the mounting plate (Fig. 5). The protective paper 26 is then removed from the tab member 2 3 to permit the tab to be secured to the mounting plate by the adhesive 25. Generally the mounting plate is rotatable so that as much carbon as is desired can be unwound from the carbon roll.

The present carbon roll also makes it very easy to change carbons. When all of the carbon is unwound from the core, the tab member 23 is merely loosened from the mounting plate 12, and the core S is removed. Since the end of the carbon is attached to the core, the carbon strip 9 need not be touched by the typist.

Since the lateral edges 10 and 11 make a snug t with the edges of the mounting plate 12, there is no tendency f or the carbon roll to skew during a typing operation. In addition, the tab member 23, attached to the mounting plate by adhesive 25, also prevents the carbon roll from sliding laterally outwardly from between adjacent strips of continuous-form stationery, and correct align ment of stationery and carbon is assured at all times.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limita tions should be understood therefrom, for some modif ications will be obvious to those skilled in the art.

I claim:

l. A carbon roll adapted for use upon a mounting Plate of a carbon holder between adjacent strips of continuous-form stationery, comprising: a hollow paper core open at its opposite ends and having a line weakening in each of its oppositely disposed, closed, lateral edges, said lines of weakeningbeing spaced apart to provide a core of predeterminedwidth when folded on said lines so as to make a snug fit at its lateral edges with the mounting plate; and an elongated strip of carbon paper wound around said core, said strip being secured at one end to said core to retain the wound strip in lateral alignment.

2 A carbon roll adapted for use between adjacent strips of continuous-form stationery, comprising: a paper sheet having its end portions turned upon each other into ,4 overlapping relationship and secured together to form a' hollow core open at its opposite ends, the lateral surface of said core having a pair of parallel, transverse, oppositely disposed lines of weakening on which said lateral surface may be folded to form a pair of opposed core portions of the same width; and an elongated strip of carbon paper wound aroundvsaid core, said strip being secured at one end to said core to retain the wound strip in lateral alignment.

3. A carbon roll as specified in claim 2, in which the end portions are secured together so as to provide on the outerlateral surface of the core an exposed unsecured free end of one of said end portions to which the strip of carbon is secured.

4. A carbon roll as specified in claim 2, in which a tab member is secured to an inner face of the hollow core, said tab member extending outwardly of one of the open ends of said hollow core and being provided with a pressure sensitive adhesive to aid in maintaining the carbon roll in proper position upon a mounting plate of a carbon holder.

5. A carbon roll assembly adapted for use in a carbon holder between adjacent strips of continuous form stationery, comprising: a hollow paper core open at its opposite ends and having a line of weakening in each of its oppositely disposed closed lateral edges, said lines of weakening being spaced apart to provide a core of predetermined width when folded on said lines; an elongated strip of carbon paper secured at one end to the core and wound thereupon to form a carbon roll; and a core mounting member positioned within said hollow core, said mounting member having opposite edge portions making a snug tit with said lines of weakening in the lateral edges of the core to restrict lateral movement of the core upon the mounting member during a typing operation.

6. A carbon roll assembly as specied in claim 5, in which a laterally extending indexing scale is provided on the mounting member so that a fresh carbon roll can be properly positioned on said mounting member when a used carbon roll is replaced.

References Cited in the file of this patent UNITED STATES PATENTS 877,755 Church Jan. 28, 1908 2,236,155 Petit Mar. 25, 1941 2,730,225 Fleischmann Jan. l0, 1956