US2730225A

US2730225A - Holder for carbon rolls

Info

Publication number: US2730225A
Application number: US462074A
Authority: US
Inventors: Lester K Fleischmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-10-13
Filing date: 1954-10-13
Publication date: 1956-01-10
Anticipated expiration: 1973-01-10
Also published as: GB773254A

Description

1956 K. FLEISCHMANN 2,730,225

HOLDER FOR CARBON ROLLS 5 (If a? .75? 5;"1035/5 Filed Oct. 13, 1954 3 Sheets-Sheet 2 l 0 v x x N r Q5} I Q I I y S l i g Q E i 5 q A? i LU 5 1W @I l \g 42. y S w WW I??? Z 25 5;

1956 L. K. FLEISCHMANN 2,730,225

' HOLDER FOR CARBON ROLLS Filed Oct. 13, 1954 3 Sheets-Sheet 3' PIE. 5 18/ ffilllllWV 58 EI'JEQQJ HOLDER FOR CARBON ROLLS Lester K. Fleischmann, Chicago, Ill.

Application October 13, 1954, Serial No. 462,074

7 Claims. (Cl. 197-126) This invention relates to carbon holders for writing machines, and more particularly to a carbon holder for supporting carbon rolls and their unwound carbons in proper alignment between strips of continuous form stationery.

Carbon holders are normally mounted for longitudinal movement upon a forms carrying device which in turn is secured to the rear of a writing machine so that the forms carrying device can move laterally with the carriage of the writing machine during a typing operation. A number of carbon rolls are each supported by the carbon holder between adjacent strips of continuous form sta-. tionery with an unwound portion extending from each roll forwardly around the platen in registry with the stationery. The forms carrying device extends rearwardly of the writing machine, and the movable parts thereof permit some play to cushion the shock from normal operation, and also abrupt stops, of the carriage. On occasion the forms carrying device gets out of lateral alignment with the platen, and when the unwoundportions of the carbons being used are moved rearwardly for use between the next following form length of stationery, the carbon may also slide laterally out of proper alignment with the adjacent strips of continuous form stationery. The structure of the present carbon holder avoids such difliculties.

The primary object of the present invention is to provide a new and improved carbon holder for supporting one or more carbon rolls between strips of continuous form stationery.

An important object is to provide an improved carbon holder for maintaining the forwardly extending carbon strip in proper lateral alignment between adjacent strips of continuous form stationery.

Another object is to provide a removable carbon roll supporting structure which will facilitate the replacement of a carbon supply roll.

A further object is to provide swingably mounted car'- ing laterally of the carbon holder base, andwhich have spacer members to provide adequate clearance for a carbon roll and a stationery strip between each adjacent pair of supporting structures.

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

Fig. 1 is a top plan view of the carbon holder;

Fig. 2, an elevational view of the holder;

Fig. 3, a sectional view taken as indicated on line 3-3 nited States Patent O 2,730,225 Patented Jan. 10, 1956 tures 13 in a pair of bosses 14 which extend upwardly from the carrying plate 10. A latch member 15, of a type more fully described in my co-pending application, Serial No. 265,113, filed January 5, 1952, may be pivoted to the carrying plate 10 and, when turned into abutment with an end of the base member 12, as shown in Fig. 1, locks the hook members 11 beneath the marginal portions adjacent the apertures 13 in the bosses 14.

A pair of upwardly extending

spaced supports

16 and 17 are secured to the base member 12 near its opposite ends. Each of the spaced supports. is provided with a plurality of similarly spaced, rearwardly opening slots 18, and a spring wire closure member, 19 and 20, respectively. Each of the closure members is adapted to be swung into one of the

upright channels

21 and 22, respectively, in the spaced supports and snapped over the

nodes

23 and 24 at the top of each of the supports.

A plurality of similar carbon roll supporting structures, each generally designated 25, extend between and are secured to the

upright supports

16 and 17. Each of the structures 25 preferably includes an elongated flat metal mounting plate 26 for receiving a carbon roll, generally designated 27. Each mounting plate is pivotally supported on a wire frame structure in turn swingably secured in the slots 18 of the

upright supports

16 and 17. Each of the mounting plates26 is maintained in a generally horizontal position when in use, and is preferably provided with a pair of scales 26a so that a new carbon roll can be placed about the mounting plate 26 in the same position as the carbon roll being replaced. The mounting plate has a spacer block 28 secured to each of its opposite end portions to provide adequate clearance for the carbon rolls 27 and strips of continuous form stationery 27a between adjacent mounting plates 26. In addition, the spacer blocks 28 provide bearing surfaces for a pair of arms 29, of the wire frame.

The arms 29 preferably swingably secure the mounting plate 26 to the

upright supports

16 and 17. Each of the arms is bent inwardly to form a trunnion 30 at its forward end of a size to fit withina well in one of the spacer blocks 28, and bent outwardly to form a trunnion 31 at its rearward end to fit within a slot 18 in the upright supports. To place the trunnions 31 in a pair of corresponding slots 18, the

closure members

19 and 20 are first swung down from their operative position in the

channels

21 and 22. When the closure members are again swung into the posiice,

- tion illustrated in Figs. 1 and 2, they lock the trunnions 31 bon roll supporting structures which are held against shiftsecurely within the forward end of the slots 18 and prevent the trunions 31 from moving longitudinally of the carbon holder.

Each of the arms 29 has an outwardly offset portion 29a which abuts the inner surfaces of the

upright supports

16 and 17 to prevent each of the supporting structures 25 from shifting laterally of the carbon holder when in use. In addition, each of the arms 29 preferably has an inwardly turned, U-shaped projection 32 adapted to fit within opposite ends of a hollow cross bar 33 which adds strength and stability to the supporting structure 25. However, the supporting structures 25 still remain sufiiciently flexible so that when one end of a mounting plate 26 is raised, its opposite end may not be raised to the same degree.

Mechanism is also provided to afford tilting adjustment for the supporting structures 25 of the carbon holder. As herein shown, this mechanism comprises a pair of supporting levers, generally designated 34, journaled in the upright supports, 16 and 17, and a pair of adjusting studs 35, each eccentrically mounted by an eccentric mounting shaft 35b passing through an upright support. Each of the adjusting studs 35 may be provided with a slot in its outer face so that a stenographer may use a 1 coin in the slot to turn each adjusting stud and vary its 3 position on an upright support. While two levers are shown, it is clear that a single-lever will adequately; per form the tilting function. In such an arrangement, one end of the structures 25 would be provided with a stationary supportwhile a siiigle' lever a'ttheotherend would raise or lower that end with" respect to" the-hori'zontali Since the levers function'- identically, a description of the operationofone lever will sufiice:

The lever' 34', preferably made of wire, has anoutwardly bent" medial portion forming" a journalshaft ortion 36 resting in an opening neanthelowere'nd of the upright support 175 Theful'crum or*journal shaft por tion 3'6 divid'es' the'lever'li l into' a' pair of'lever arms; 37 a and 38; Ijever arm 37 extends generally rearwardly adjacent the outer face of theupright upport- 17. Iiev'er arrn' 38extend'sgenerally forwardlyof the carbonholder; and terminatesin a hooked end portion 39' which is nor madly in supporting} engagemcnt with the arm 29on' the lowermost of the carbon roll supporting structures 25. The weight of the sup orting structures 25 on the lever arm 38 maintains the lcver'arm 37consta'ntly'in engagement with the underside of an annular'depression 35a in'thest'ud35 on theupright su orrfl-Z Toop'erate thetiltingmechanism,.the stud'35 isturn'ed so that'it moves; for instance; downwardly of the support 17-i This depresses the lever arm 37 and raises the lever arm 38"causing'themounting plate 26 to tilt'slightly from its generally horizontal position. By" turning the stud 35- in the opposite direction; the lever amt 37 is raised'lowcring'lever' arm 38 which is' depressed by the weight ofthe-supporting structure25.

The purpose of tilting the mountingplate 26 of the carbon holder is to maintain the'free'end of. the carbon unwound from the carbon roll inproper'latcral alignmentbetween adjacent strips of' continuous form stationeryi During atyping operation, theca'rbon' holder is advanced longitudinallyof the forms carryingdevice toward the writing machine as one or several their lengths are being typed.- Ul'tir'nately the carbon holder reaches its forward limit. The carbon holder andc'arbon their mustbe retracted so-that the carbon can be used again between followin'g-formlengths in the stripof c'o'ntinuousform stationery; It is duringthis retraction of the carbon that its-lateralalignmentmust b'e'carefully preserved. If the formscarrying deviceisslightlyaskew due to the looseness of itsattachment to the'writin'g'machine, the carbon being-flexible, may also travellaterall'yof the stationery strips" as it is withdrawn; The strips of stationery of course will not be affected because theya're held' upon theplaten of thewriting machine. To correct the lateraltravelofthe carbon; an end ofth'e ca'rbonroll'Z'T on the mounting'plate 26" is" raised or lowered, as the case may-"be; so that the'carbon is'retracte'din proper lateral alignment between the stationery strips. So longas the carbon: roll 27" istil'te'd from the horizontal, the tilting mechanism used may vertically adiust an end of the mounting plate"26*alo'ne or it may'til't the entirecarbon" holder with respect to thehoriiontal.

ln'usingthe present carbon holder, it is preferred'that a mounting platebepositioned beneath the bottom, and above the top; stationery strip; Suchv an arrangement has been found to provide added-tension in the lowermost and uppermost strip so' thatneither" will advancetoo rapidly, or too' slowly, about theplaten of the typewriter. 1

In order to replace a carbonroll, one either arms is sprung outwardly permitting the old carbon roll to be slipped off. Theoperatormay note the-position ofthe old carbon roll with respect to the scale 26a, and a new carbon roll is slid over the'mounting plate to the proper position and may be secured in place by a tab 27b provided with a pressure sensitive adhesive. Trunnion 30 is then replaced in its spacer block 28.

To add a new strip o'f ca'rbori between the stationery strips, the old carbon strip is merely torn oil? with the form lengths which have been typed; Each mounting plate is then'tlipped overtwo-or three times to unroll and provide a new carbon supply after which normal typing operation canonc'emoreproceed.

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

I claim:

I". A carbon" holder for su'pportinga carbon roll becured to the writing machine, said" base member having a pair of upwardly extending spaced supports; a carbon roll supportingstructure'extending between and secured to said spaced'support's to holda carbon roll in a generally horizontal position; and mechanism for adjustably tilting said carbon roll s'upporting structure to maintain carbon unwoundfrom the c'arbori' roll in proper lateral alignment between" the"- strips' of continuous form sta tio'riei'y'.

2.-A'- carbon-holder for supporting a carbon roll between strips of continuous-form stationery in a writing machine, comprising? a' base member adapted to be secured to the writing machine, said base member having a-pair-of upright spa'ced supports; a carbon roll supporting structure-extending between and secured to said spaced supports for holding the c'arbon-roll-in a generally horizontal position, said supporting structure including a mounting platefo'rreceiving and supporting the carbon roll; and an arm-secured to each upright support and to an endpo'rtio'nof the mounting plate; a supporting lever fulcrumed on said base and extending outwardly into supporting engagement withon'e of said arms; and manually operable m'echanism for raising and lowering thelever so a's to tilt thecarbon roll mounting plate and maintain-carbonunwound'from the carbon roll in proper lateral alignment between the strips of continuous form station'em- 31- A carbon h'olden a's specified in claim 2, in which the rrfanually operable mechanism comprises an eccentrically mounted stud on one ofsaid upright supports, said stuck-normally-contacting-a portion of the supporting lezver 'whereby riotation:of said stud imparts-movement to said lever to provide tilting adjustmento'f the mounting plate:

4'3. Artcarbo'nlholder as: specified in claim 2, in which a portion of eachmf'the arms :abuts its respective spaced support to preven'ttlatera'l shifting of the carbon roll supporting structure;

5. A carbon holder as specified'in claim 2, in which each oflthe'spacedsupports hasa plurality of similar rearwardly opening slots and a'spring wire closure member to close the'open ends of said slots, and the arms of the supporting structure-are journaled in corresponding slots in their respective. upright supports toswingably mount said supporting structure, each of said closure members holding one of saidarms" securely within its'- respective slot? 6. A carbon holder for supporting a plurality'ofcarbonirollsrb'etweenstrips of continuous form stationery in a writing machine, comprising: a base member adapted to besecuredto the writing machine, said basemernberhavingra 'pair of upright spacedsupports; a plurality of carbon roll: supporting}? structuresswingably. mountedin said spaced supports each of. saidsupporting; structures in cludingea mounting plate-.tor receivingliand supporting-1a carbon roll, and a light weight wire frame pivotally supporting said mounting place, said frame being swingably received in said upright supports, a portion of the wire frame abutting said upright supports for maintaining lateral alignment of the carbon roll supporting structure; and a side support positioned at each side of said carbon roll supporting structures, said side supports engaging and supporting said structures in a predetermined position, one of said side supports being manually adjustable in elevation for tilting the carbon roll supporting structures to maintain carbon unwound from the carbon rolls in proper lateral alignment between the strips of continuous form stationery.

7. A carbon holder for supporting a plurality of car bon rolls between strips of continuous form stationery in a writing machine, comprising: a base member adapted to be secured to the writing machine, said base member having a pair of upright spaced supports; a plurality of carbon roll supporting structures swingably mounted in superposed relation on said spaced supports, each of said supporting structures including an elongated, carbon roll mounting plate having opposite end portions, a spacer block secured to each of said end portions to provide clearance between superposed mounting plates, and a pair of arms each pivotally secured at one end to the spacer block and at the other end to a spaced support; and a pair of supporting levers, each fulcrumed on said base member to form two lever arms, the first of said lever arms extending forwardly into supporting engagement with the bottom supporting structure, and the second of said lever arms extending rearwardly adjacent their respective upright supports, the engagement of each of said first lever arms and said bottom supporting structure normally tending to rotate each of said second lever arms; and a stud eccentrically mounted on each of the upright supports and contacting each of the second lever arms to arrest their rotative movement, the turning of one of said studs causing pivotal movement of a supporting lever so as to tilt an end portion of said mounting plates to maintain carbon unwound from the carbon rolls in proper lateral alignment between strips of continuous form stationery.

References Cited in the file of this patent UNITED STATES PATENTS