US3924724A - Structure for facilitating interchange of typing elements - Google Patents

Structure for facilitating interchange of typing elements Download PDF

Info

Publication number
US3924724A
US3924724A US56008575A US3924724A US 3924724 A US3924724 A US 3924724A US 56008575 A US56008575 A US 56008575A US 3924724 A US3924724 A US 3924724A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
element
cover
locking
typing
cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Gunter Kerzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympia Werke AG
Original Assignee
Olympia Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00Typewriters or selective printing mechanisms characterised by the mounting, arrangement, or disposition of the types or dies
    • B41J1/60Typewriters or selective printing mechanisms characterised by the mounting, arrangement, or disposition of the types or dies with types or dies on spherical, truncated-spherical, or like surfaces
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S206/00Special receptacle or package
    • Y10S206/804Special receptacle or package with means to lift or draw out content

Abstract

In order to facilitate the interchange of typing elements of the type having a cap at their top and arranged to be interchangeably installed on the element post of a typing machine, and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post, there is provided a member which defines a cover arranged to close the container in a hermetically sealed manner, and the cover is provided with a coupling unit which serves to connect the cover to the typing element cap while holding the locking device in its unlocking position, and a control member which can be actuated to disconnect the cover from the cap in order to permit the cover to be removed from the typing element, the locking device being enabled to move to its locking position upon removal of the cover from the cap.

Description

Kerzel l l STRUCTURE FOR FACILITATING INTERCHANGE OF TYPING ELEMENTS [75] Inventor: Gunter Kerzel, Middelsfahr,

Germany [73] Assignee: Olympia Werke AG,

Wilhelmshaven, Germany [22] Filed: Mar. 19, 1975 [211 App]. No.: 560,085

[30] Foreign Application Priority Data Mar. 23, 1974 Germany 2414127 [52] US. Cl 197/52; 206/804 [51] Int. Cl. B41J 1/60 [58] Field of Search 197/52; 206/804, 472, 403,

[56] References Cited UNITED STATES PATENTS 2,969,864 l/l961 Holgate 197/52 3,001,628 9/1961 Rice, Jr 197/52 3,307,677 3/1967 Frank et al. 197/52 3,576,340 4/1971 Jones et al. 206/444 X 3,635,608 1/1972 Crouch et a1. 206/444 3,753,490 8/1973 Mowrey l l 206/444 3,800,934 4/1974 Decker.... 197/52 3,826,345 6/1974 Miller 197/52 OTHER PUBLICATIONS Spherical Type Element Holding Device, R. D. Mathews, IBM Tech. Disc. Bulletin, Vol. 13, No. 1, June 1970.

One-Piece Chipboard Typehead Box, Dunning et al., IBM Tech. Disc. Bulletin, Vol. 17, No. 1, June 1974.

Primary Examiner-Edgar S. Burr Assistant Examiner-Paul J. Hirsch Attorney, Agent, or FirmSpencer & Kaye [57] ABSTRACT In order to facilitate the interchange of typing elements of the type having a cap at their top and arranged to be interchangeably installed on the element post of a typing machine, and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post, there is provided a member which defines a cover arranged to close the container in a hermetically sealed manner, and the cover is provided with a coupling unit which serves to connect the cover to the typing element cap while holding the locking device in its unlocking position, and a control member which can be actuated to disconnect the cover from the cap in order to permit the cover to be removed from the typing element, the locking device being enabled to move to its locking position upon removal of the cover from the cap.

6 Claims, 4 Drawing Figures 3,924,724 [451 Dec. 9, 1975 U.S. Patent Dec. 9, 1975 Sheet 1 of2 3,924,724

U.S. Patent Dec. 9, 1975 Sheet 2 of2 3,924,724

STRUCTURE FOR FACILITATING INTERCHANGE OF TYPING ELEMENTS BACKGROUND OF THE INVENTION The present invention relates to an apparatus for replacing a capped typing element for typewriters or sim ilar office machines of the type in which the typing element is releasably fastened to the element post of the machine by means of a locking device disposed on its top surface, the typing element being stored prior to installation in a cup-shaped container having a hermetically sealed cover.

In printing mechanisms of typewriters and similar machines it is important that the typing element be easily exchangeable because there is often the necessity to frequently change over to foreign languages having different characters, to other types of script, or to special formula symbols. In such a change, the typing element should be easily removable from, and insertable into, its mount without there existing the danger of dropping the typing element or of soiling the fingers with printing ink.

Austrian Pat. No. 270,699 discloses a typing element with a lever handle which is pivotally mounted in a cap. This lever handle acts via a cam surface disposed thereon on a wire spring which is also disposed in the cap and engages in a groove in the element post. Complicated process steps are required to produce the lever handle of the known arrangement, and particularly to produce the cam surfaces. These cam surfaces are also subject to increased wear because the free ends of the spring are in continuous frictional contact with the cam surfaces. Thus, these cam surfaces must be made of a hardenable material and this involves additional expenditures.

The known locking device further requires a certain dexterity on the part of the operator since pivoting of the lever handle is effected against the continuously increasing force of the wire spring and must thus be performed with care in order to prevent the thumb or a tinger from slipping off the lever handle. If this were to occur, the lever handle, which is under the force of the spring, would flip back into its starting position.

This known lever handle does prevent contact with the typing element surface during placement onto, and removal from, its mount, but not when the element must be taken out of its box. In the box, the lever handle of the interchangeable typing element, which has a dirty surface, is in the closed position. In order to place this typing element onto the mount of the element post, it is necessary to tilt up the lever handle. Since this is effected against the force of a spring, the typing element must be supported by placing the fingers against its surface. The danger of soiling the fingers with the printing ink thus remains.

SUMMARY OF THE INVENTION It is an object of the invention to provide a typing element which the machine operator can exchange without special dexterity being required and without the danger of soiling their fingers.

These and other objects of the invention are achieved in a device of the type described above by the provision of a detent coupling which is under spring pressure and which connects the cover of the container with the cap of the typing element to permit removal of the element from, or installation on, the element post and by arranging the locking device so that it can be manually brought into two positions by means of the cover for the purpose of locking or releasing the typing element.

The apparatus according to the present invention permits safe and easy exchanging of the typing element without contact with the surface bearing the type characters. The removal and placement and the release and fastening of the typing element on its mount is effected by means of the already present cover of the storage container for the typing element. Thus no additional auxiliary means are required.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a preferred embodiment of the invention.

FIG. 2 is a cross-sectional view of the typing element and the container cover of FIG. 1 in place on an element post.

FIG. 3 is a view similar to that of FIG. 2 showing the elements of FIG. 2 in a different state.

FIG. 4 is a plan view of the locking device of the preferred embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cup-shaped container 1 with a hermetic sealing locking cover 3 for a typing element, for example a spherical typing ball 5. The element 5 may of course also have another shape, for example a cylindrical shape. The spherical typing ball 5 is firmly and permanently connected with a cap 7 and is constructed to be form-fittingly and releasably connected, by means of a bearing sleeve 9 disposed in its upper portion, as shown in FIGS. 2 and 3, with an element post 11 of the setting drive of a typewriter.

The element 5 is locked in its position by means of a locking device which is disposed on its topside and below cap 7. Post 11 and the structure for controlling its movements are already known in the art. This locking device includes, for example as shown in FIG. 4, three spring-tensioned blocking slides 13, 15 and 17 which are angularly spaced from one another, and which are guided into corresponding transverse slits 19, 21 and 23 in the bearing sleeve 9 so as to engage, through the sleeve 9, in an annular groove 25 of element post 11.

By means of a common spring ring 27, the blocking edges 29, 31 and 33 of theblocking slides 13, 15 and 17, respectively, are urged into groove 25, these edges being in constant contact with ring 27 by means of bent tongues 35, 37 and 39, respectively.

In order to mount the spherical typing ball 5 on element post 11 without axial play, the groove surface 26 of groove 25 which cooperates with blocking edges 29, 31 and 33 is given a conical shape. Thus the lower surface 41 of the bearing sleeve 9 is always pressed without play against a radial extension 43 of the element pull 1 1. Of course, this mounting without play can also be realized by giving a conical configuration to the blocking edges 29, 31 and 33 of the blocking slides 13, 15 and 17, respectively.

The removal of the typing ball 5 from element post 11, or the installation of ball 5 on post 1 1, is made possible by cover 3 of container 1. For this purpose, cover 3 is provided with a detent coupling which is maintained under spring pressure and which can be connected with the cap 7 of typehead 5. This detent coupling includes a plurality of, for example three, fingers 45 which are angularly offset by 120 from one another and which are disposed on the inside of cover 3. These fingers can be pushed into and through appropriately designed recesses 51 in cap 7 of the ball 5 and can be held fast to cap 7 by means of detent ridges 57 which are carried by resilient arms 63 integral with fingers 45 and which normally project into the region between cap 7 and sleeve 9.

The connection between the ball 5 and cover 3 can be controlled by a button 77 which is disposed in the center of cover 3. This button 77 is mounted to be axially movable in a portion of cover 3 which is provided with a circular gripping edge 79. The free ends 81 of fingers 45 in cover 3 are provided with tapered, conically rounded edges 87 which cooperate with the bent tongues 35, 37 and 39 of the blocking slides l3, l5 and 17, respectively, in order to bring the blocking slides 13, 15 and 17 into their unlocked position when the cover 3 and cap 7 are coupled together and into their locked position when the detent coupling between tongues 35, 37 and 39 and fingers 45 is released.

The coupling of element post 11 with typing element 5 is effected via a pin-slot connection. For this purpose the bearing sleeve 9 is provided with two slits 2 and 4, of respectively different widths, which can be coupled by means of a pin 6 held in post 11 and having ends 8 and of respectively different diameters adapted to the widths of the slits. The respectively different diameters of ends 8 and 10 of pin 6 and the corresponding respectively different widths of slits 2 and 4 are necessary in order to assure that the typing element 5 will be installed in the proper direction.

The arrangement according to the present invention operates as follows:

In order to install the spherical typing ball 5 into a typewriter, it is taken together with its cover 3 from the cup-shaped container 1 of FIG. 1 and placed onto the element post 11. Then cover 3 and element 5 are rotated until the ends 8 and 10 of pin 6 are disposed above their associated slits 2 and 4. The element 5 and its cover 3 can now be pushed downwardly until the lower surface 41 of the bearing sleeve 9 comes to rest on the extension 43 of the element post 11.

Now button 77 is pressed downwardly in the direction of the arrow in FIG. 2 so that a convexly curved spring disc 69 is brought into approximately its flattened, or extended, position. Thus, the resilient arms 63 with their detent ridges 57 are pressed outwardly so that the detent coupling is released.

Now cover 3 is free to be pulled upwardly'via its gripping edge 79 into the position shown in FIG. 3. Thus, the free ends 81 of fingers 45 release the blocking slides 13, 15 and 17 and the latter are urged by the force of spring ring 27 with their blocking edges 29, 31 and 33 against the conical surface 26 of groove 25 of the ele' ment post 11. Due to the cooperation of the conical surface 26 of groove 25 with the blocking edges 29, 31 and 33, the typing element becomes fastened without axial play on element post 11. Cover 3 is then put back on container 1.

If the typehead 5 is now to be removed again from element post 11, cover 3 is again picked up and fingers 45 are placed into the corresponding recesses 51 in cap 7 of element 5. The cover 3 is pressed downwardly until the free ends 81 of fingers 45 come to rest on the extension 43 of the element post 1 1. Thus the free ends 81 of fingers 45 press with their concial edges 87 onto the bent tongues 35, 37 and 39 of the blocking slides 13, 15

and 17 in such a way that the latter are brought into the released position in opposition to the force of spring ring 27. Moreover, the detent ridges 57 engage between cap 7 and sleeve 9 when cover 3 is being pressed down. Now the typing ball 5 can be easily lifted together with, and with the aid of, cover 3 without requiring contact with the ink covered surface of the ball. The ball 5 is then placed back into container 1. Thus the operator of the machine need not have any special dexterity to exchange the typing ball 5 and soiling of the fingers is virtually impossible in this type of exchange process.

It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims; in particular, the described detent coupling betweenthe cover and the cap of the typehead as well as the locking devices between the typehead and the type carrier shaft can be modified.

What is claimed is:

1. In combination: a typing element having a cap at its top and arranged to be interchangeably installed on the element post of a typing machine and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post; and a member defining a cover arranged to close the container in a hermetically sealed manner, wherein the improvement comprises: detent coupling means arranged to selectively connect said cover to said cap for permitting said typing element to be moved as a unit with said cover; spring means normally maintaining said detent coupling means in the position for creating such connection between said cover and said cap; and latch means carried by said cover for holding said locking means in said unlocking position when said cover is connected to said cap and for enabling said locking device to move to said locking position when said cover is separated from said cap.

2. An arrangement as defined in claim 1 wherein said cap is provided with a plurality of openings, and said latch means comprise a plurality of fingers projecting from that side of said cover which faces toward the interior of said container when closing said container, said fingers being arranged to engage through respective ones of said openings, and said detent coupling means comprise a plurality of detent ridges each carried by a respective one of said fingers and extending laterally past the border of a respective opening to thus selectively connect said cover to said cap.

3. An arrangement as defined in claim 2 wherein said spring means comprise a plurality of resilient arms each carried by a respective one of said fingers and each carrying a respective one of said detent ridges, and said detent coupling means further comprise a convexly curved spring disc operatively associated with said resilient arms in a manner such that flattening of said disc moves said ridges in a direction to release the connection between said cover and said cap, and a push button located at the center of said cover and operatively associated with said disc in such a manner that pressure on said button serves to move said disc in the direction of flattening.

4. An arrangement as defined in claim 3 wherein said locking device comprises a plurality of blocking slides presenting blocking edges arranged, when said typing element is installed on the element post of a typing machine, to be disposed concentrically to an annular locking groove provided on the element post and to engage in such locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear such groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.

5. An arrangement as defined in claim 3 further comprising an element post on which said typing element is to be installed, said post having an annular locking groove presenting a conical configuration in the direction of movement of said locking device, and said locking device comprises a plurality of blocking slides presenting blocking edges disposed concentrically to said locking groove when said element is on said post and arranged to engage in said locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear said locking groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the looking position of said device when said cover is separated from said cap.

6. An arrangement as defined in claim 4 wherein said locking device further comprises a common spring ring connected to all of said blocking slides for urging them into the locking position of said device.

Claims (6)

1. In combination: a typing element having a cap at its top and arranged to be interchangeably installed on the element post of a typing machine and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post; and a member defining a cover arranged to close the container in a hermetically sealed manner, wherein the improvement comprises: detent coupling means arranged to selectively connect said cover to said cap for permitting said typing element to be moved as a unit with said cover; spring means normally maintaining said detent coupling means in the position for creating such connection between said cover and said cap; and latch means carried by said cover for holding said locking means in said unlocking position when said cover is connected to said cap and for enabling said locking device to move to said locking position when said cover is separated from said cap.
2. An arrangement as defined in claim 1 wherein said cap is provided with a plurality of openings, and said latch means comprise a plurality of fingers projecting from that side of said cover which faces toward the interior of said container when closing said container, said fingers being arranged to engage through respective ones of said openings, and said detent coupling means comprise a plurality of detent ridges each carried by a respective one of said fingers and extending laterally past the border of a respective opening to thus selectively connect said cover to said cap.
3. An arrangement as defined in claim 2 wherein said spring means comprise a plurality of resilient arms each carried by a respective one of said fingers and each carrying a respective one of said detent ridges, and said detent coupling means further comprise a convexly curved spring disc operatively associated with said resilient arms in a manner such that flattening of said disc moves said ridges in a direction to release the connection between said cover and said cap, and a push button located at the center of said cover and operatively associated with said disc in such a manner that pressure on said button serves to move said disc in the direction of flattening.
4. An arrangement as defined in claim 3 wherein said locking device comprises a plurality of blocking slides presenting blocking edges arranged, when said typing element is installed on the element post of a typing machine, to be disposed concentrically to an annular locking groove provided on the element post and to engage in such locking groove to define the locking position of said deviCe, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear such groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.
5. An arrangement as defined in claim 3 further comprising an element post on which said typing element is to be installed, said post having an annular locking groove presenting a conical configuration in the direction of movement of said locking device, and said locking device comprises a plurality of blocking slides presenting blocking edges disposed concentrically to said locking groove when said element is on said post and arranged to engage in said locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear said locking groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.
6. An arrangement as defined in claim 4 wherein said locking device further comprises a common spring ring connected to all of said blocking slides for urging them into the locking position of said device.
US3924724A 1974-03-23 1975-03-19 Structure for facilitating interchange of typing elements Expired - Lifetime US3924724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742414127 DE2414127A1 (en) 1974-03-23 1974-03-23 Means for changing a type provided with a cap for write head or similar office machines

Publications (1)

Publication Number Publication Date
US3924724A true US3924724A (en) 1975-12-09

Family

ID=5910985

Family Applications (1)

Application Number Title Priority Date Filing Date
US3924724A Expired - Lifetime US3924724A (en) 1974-03-23 1975-03-19 Structure for facilitating interchange of typing elements

Country Status (3)

Country Link
US (1) US3924724A (en)
JP (1) JPS50127721A (en)
DE (1) DE2414127A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264221A (en) * 1978-12-11 1981-04-28 International Business Machines Corporation Print element cartridge
US4332490A (en) * 1979-07-03 1982-06-01 Hermes Precisa International S.A. Lining-up assembly for a printing disc
US4386862A (en) * 1978-11-21 1983-06-07 Olympia Werke Ag System for introducing function control instructions into a data writing office machine
US4586836A (en) * 1983-02-09 1986-05-06 Caracteres S.A. Characters carrying disc for printing machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969864A (en) * 1959-08-24 1961-01-31 Ibm Attachment for print head
US3001628A (en) * 1960-10-27 1961-09-26 Ibm Printing mechanism
US3307677A (en) * 1965-10-06 1967-03-07 Ibm Arm positioned type head
US3576340A (en) * 1969-07-03 1971-04-27 Data Technology Corp Latch for disc pack protective cover
US3635608A (en) * 1969-03-26 1972-01-18 Ibm Magnetic disk assembly
US3753490A (en) * 1971-06-24 1973-08-21 Gen Instrument Corp Carry case for magnetic discs
US3800934A (en) * 1969-12-31 1974-04-02 Triumph Werke Nuernberg Ag Mounting means for single element type carrier
US3826345A (en) * 1973-01-26 1974-07-30 Scm Corp Print head mounting assembly

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969864A (en) * 1959-08-24 1961-01-31 Ibm Attachment for print head
US3001628A (en) * 1960-10-27 1961-09-26 Ibm Printing mechanism
US3307677A (en) * 1965-10-06 1967-03-07 Ibm Arm positioned type head
US3635608A (en) * 1969-03-26 1972-01-18 Ibm Magnetic disk assembly
US3576340A (en) * 1969-07-03 1971-04-27 Data Technology Corp Latch for disc pack protective cover
US3800934A (en) * 1969-12-31 1974-04-02 Triumph Werke Nuernberg Ag Mounting means for single element type carrier
US3753490A (en) * 1971-06-24 1973-08-21 Gen Instrument Corp Carry case for magnetic discs
US3826345A (en) * 1973-01-26 1974-07-30 Scm Corp Print head mounting assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386862A (en) * 1978-11-21 1983-06-07 Olympia Werke Ag System for introducing function control instructions into a data writing office machine
US4264221A (en) * 1978-12-11 1981-04-28 International Business Machines Corporation Print element cartridge
US4332490A (en) * 1979-07-03 1982-06-01 Hermes Precisa International S.A. Lining-up assembly for a printing disc
US4586836A (en) * 1983-02-09 1986-05-06 Caracteres S.A. Characters carrying disc for printing machine

Also Published As

Publication number Publication date Type
DE2414127A1 (en) 1975-10-02 application
JPS50127721A (en) 1975-10-08 application

Similar Documents

Publication Publication Date Title
US3272304A (en) Typewriter ribbon package
US5727888A (en) Printer and a composite cassette including a tape cassette and a ribbon cassette used in the printer
US4803922A (en) Transfer printing apparatus
US5953987A (en) Screen printing registration system
US5120147A (en) Printing device
US5503068A (en) Retractable pallet attachment for screen printing
US4031995A (en) Keyboard actuated paper insertion and ejection mechanism
JPS59115863A (en) Plane scanning type ink jet recording apparatus
US4124312A (en) Impact printer with print wheel cartridge
US4176603A (en) Label strip inserting device
US4243333A (en) Printing apparatus
JPH071805A (en) Printing apparatus
US3986593A (en) Snap-action fastener assembly
US4595191A (en) Paper feed device having retractable separating pawls
US4605325A (en) Ribbon cassette with releasable locking mechanism
US3976183A (en) Typewriter ribbon supply adapter for replaceable ribbons
US4018154A (en) Printing apparatus for cash register
US3977511A (en) Ribbon loading device
US4396305A (en) Ribbon Cartridge handling apparatus
JPS55153949A (en) Image forming apparatus
US3526309A (en) Ink transfer roller with ink supply interrupter for a type wheel
US5631690A (en) Recording apparatus
US3927746A (en) Typing and correcting cartridge for single-element typewriters
US3997046A (en) Flexible correction auxiliaries for use with golf-ball typewriters
US4310255A (en) Printer with cartridge type wheel