EP0449392B1 - System including ink ribbon and correction tape cassettes having a compatibility arrangement - Google Patents
System including ink ribbon and correction tape cassettes having a compatibility arrangement Download PDFInfo
- Publication number
- EP0449392B1 EP0449392B1 EP91201459A EP91201459A EP0449392B1 EP 0449392 B1 EP0449392 B1 EP 0449392B1 EP 91201459 A EP91201459 A EP 91201459A EP 91201459 A EP91201459 A EP 91201459A EP 0449392 B1 EP0449392 B1 EP 0449392B1
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- EP
- European Patent Office
- Prior art keywords
- cassette
- ribbon
- correction tape
- cassettes
- providing
- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J32/00—Ink-ribbon cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
- B41J35/22—Mechanisms permitting the selective use of a plurality of ink ribbons
- B41J35/23—Mechanisms permitting the selective use of a plurality of ink ribbons with two or more ribbon guides
Definitions
- This invention is directed to systems including devices, such as typewriters, which utilize at least two different cassettes, such as a typewritter ribbon cassette and a correction cassette.
- U.S. Pat. No. 4,636,097 includes means for rendering the printer inoperable when the end of the typewriter ribbon in a cassette is sensed, or when there is no cassette in the printer.
- Another such device is disclosed in IBM Technical Disclosure Bulletin, Vol. 25, No. 4, September 1982.
- the cassette disclosed therein provides a signal to the device (such as a typewriter) which identifies the contents of the cassette, so that the device may adjust to the characteristics of the cassette contents.
- Still another such device is disclosed in U.S. Pat No. 4,516,137 wherein the presence or absence of a thermal ribbon cassette is sensed by the printer. If a thermal ribbon cassette is present, the printer can print only undirectionally, whereas when the ribbon cassette is not present, the printer prints bi-directionally.
- Patent Abstracts of Japan, Vol. 10, No. 216 (M-502) [2272], re. JP-A1-6154975, describes a system wherein the presence or absence of a detector on an ink ribbon cassette in a device is used (via a selection switch 24) to select an appropriate printing pressure in that device.
- Patent Abstracts of Japan Vol. 9, No. 98 (M-375) [1821], re JP-A-59222380, describes a system wherein a tab/pair of tabs is provided on each monocolour ribbon cassette of the system so as to activate switches when inserted into a device to identify to that device the colour of the ribbon in the inserted cassette.
- a typewriter ribbon cassette includes a plastic jacketing in which the ribbon and various components are conveniently housed. These components may include, among other things, a supply spool upon which a supply of typewriter ribbon is located, mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located.
- a typewriter drive mechanism rotates the take-up spool to cause fresh ribbon from the supply spool to advance to the print point.
- a typewriter ribbon cassette of this type is disclosed in U.S Pat. No. 4,302,118.
- Such typewriter ribbon cassettes may contain various types of ribbons.
- the ribbon may be of the single-strike carbon ribbon type or of the multiple-strike carbon ribbon type. If the ribbon is a single-strike carbon ribbon, the ribbon is incrementally fed in such a manner that upon a single character being typed on a portion of the ribbon, the ribbon is advanced so that the next character is typed on a fresh portion of the ribbon.
- the ribbon is a multiple-strike ribbon, such as the "Multi-Strike" ribbon sold by Smith Corona Corporation, the ribbon is incrementally fed in such a manner that upon a character being typed on a ribbon, the ribbon is advanced a lesser distance so that the next character is typed on a ribbon portion comprising both a typed ribbon portion and a fresh ribbon portion. In this manner, significantly more characters may be typed on a multiple-strike ribbon than on a single-strike ribbon.
- a typewriter correcting cassette may also include a plastic jacketing for conveniently housing a correcting tape and various components.
- the components of a correcting cassette may include a supply spool, means for assuring the uniform withdrawal of correcting tape from the supply spool, and a take-up spool.
- the correcting tape may be of two types, namely, the type commonly referred to as "lift-off” tape, in which the tape, upon striking the unwanted character, removes the unwanted character from the paper, or the type commonly referred to as "cover-up” tape, in which, upon the tape striking the unwanted character, a powdered material on the tape is transferred to and covers up the unwanted character on the paper.
- the cassette with means for assuring that the cassette is functionally compatible with the corresponding second cassette of the combination or assembly upon the cassettes being inserted into a device, such as a typewriter in a system which utilizes the cassettes.
- the means for assuring cassette compatibility will prevent the first cassette from being properly placed in the device and indicating to the operator that an attempt is being made to place into the device a cassette which is not compatible with another being so placed.
- the present invention provides a system utilising a cassette assembly including selectively combinable first and second cassettes, said system comprising in combination: a device in which an assembly of a first and a second cassette are inserted for operation of the device; a first cassette for use in said device,said first cassette having an ink ribbon; and a second cassette for use in said device, said second cassette having a correction tape ; characterised in that there is further provided compatibility means comprising: a first structural feature provided on said first cassette at a location corresponding to the type of ink ribbon in said first cassette, a second structural feature provided on said second cassette at a location corresponding to the type of correction tape in said second cassette, the first and second structural features being adapted for inhibiting the proper mounting of said first and second cassettes in the device unless the ink ribbon in the first cassette is compatible with the correction tape in the second cassette.
- the present invention further provides a method for assembling a system including a device and at least one assembly of selectively combinable first and second cassettes adapted for insertion into the device, the method comprising the steps of: providing the first cassette with an ink ribbon ; providing the second cassette with a correction tape ; and inserting the first and second cassettes into the device; characterised in that there is further provided the step of providing on said cassettes compatibility means, said compatibility means being disposed on said first and second cassettes in assembly-specific locations corresponding to the type of ribbon in said first cassette and the type of correction tape in said second cassette for inhibiting cassettes having incompatible ink ribbon and correction tape combinations from being properly placed in said device.
- Cassette compatibility is also achieved, in general, by providing a switch means in the typewriter, printer, or the like, which controls the on - off condition of the typewriter, and means located on the ribbon cassette that activates the on-off typewriter switch means.
- the ribbon cassette activating means will not activate the on-off typewriter switch when functionally incompatible cassettes are present in the typewriter.
- the ribbon cassette activating means will activate the on-off typewriter switch only when either a single-strike ribbon cassette and a cover-up correction tape cassette are present in the typewriter or when a multiple-strike ribbon cassette and a lift-off correction tape cassette are present in the typewriter.
- a first typewriter ribbon cassette 2 having a housing 4 within which a first typewriter ribbon 6 (which may be of the single-strike carbon ribbon type), and various other components, are housed.
- a formation 8, such as a tab, extends from the right-hand portion of the bottom of the housing 4 for a purpose to be described hereinafter.
- a single-strike carbon ribbon is of the type which is incrementally fed in such a manner that upon a character being typed on a ribbon portion, the ribbon is advanced so that the next character is typed on a fresh portion of the ribbon.
- These components may include, among other things, a supply spool upon which a typewriter ribbon supply is located, a mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located.
- a supply spool upon which a typewriter ribbon supply is located a mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located.
- a cassette is presently being sold by Smith Corona Corporation under its "H Correctable" mark.
- a first correction tape cassette 10 which is functionally compatible with the first typewriter ribbon cassette 2, and within which a first correction tape 12 of, for example, the lift-off type, together with other components, is housed.
- the ribbon cassette 2 and the functionally compatible correction cassette 10 may be designated a cassette combination or assembly.
- Typewriter actuating means causes the type element to strike the lift-off tape against the unwanted character on the paper, and the lift-off tape withdraws the unwanted character from the paper.
- the components (not shown) in the first correction tape cassette 10 may include a supply roll of correcting tape, means for assuring the uniform withdrawal of correcting tape from the supply spool and a take-up spool.
- the first correction tape cassette 10 also includes a flat portion 14 having a formation 16 illustrated as an opening, in the right-hand portion, through which the tab formation 8 of the first typewriter ribbon cassette 2 extends when the cassettes are inserted into the typewriter.
- Fig. 1 further discloses a shiftable bracket section 18 adapted to operationally accommodate the first typewriter ribbon cassette 2 and the first correction tape cassette 10 thereon.
- the shiftable bracket section 18 is pivotable about pivot points 20 by conventional typewriter means (not shown) for presenting either the first typewriter ribbon 6 or the lift-off first correction tape 12 to the typewriter print point.
- the engagement of the tab formation 8 of the ribbon cassette 2 with the opening formation 16 of the first correct tape cassette 10 ensures that the cassettes are compatible with each other.
- the cassettes 2 and 10 are configured so that unless the formations 8 and 16 are in operational engagement, the cassette assembly will not be capable of being inserted in the typewriter. Consequently, the typewriter will be inoperable.
- Fig. 2 shows a second typewriter ribbon cassette 2a and a second correction tape cassette 10a which are generally similar in construction to the first typewriter ribbon cassette 2 and the first correction tape 10 shown in Fig. 1. Therefore, in large part, the same numerical reference numerals will be used in Fig. 2 as were used in Fig. 1, except that the letter "a" will be added to the reference numerals of Fig. 2.
- a second typewriter ribbon cassette 2a having a housing 4a within which a second typewriter ribbon 6a, which may be of the multiple-strike carbon ribbon type, and various other components are housed.
- a formation 44 such as a tab extends from the left-hand portion of the bottom of the housing 4a for the purpose to be hereinafter described.
- a multiple-strike carbon ribbon is of the type which is incrementally fed in such a manner that upon a character being typed on a ribbon portion, the ribbon is advanced so that the next character is typed on a ribbon portion comprising both a typed ribbon portion and a fresh ribbon portion.
- These components may include, among other things, a supply spool upon which a typewriter ribbon supply is located, mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located.
- a supply spool upon which a typewriter ribbon supply is located may include, among other things, a supply spool upon which a typewriter ribbon supply is located, mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located.
- a cassette is presently being sold by Smith Corona Corporation under its "H Multi-Strike" mark.
- the second correction tape cassette 10a which is functionally compatible with the second typewriter ribbon cassette 2a, and within which a second correction tape 12a of, for example, the cover-up type, together with other components, is housed.
- the ribbon cassette 2a and the functionally compatible correction cassette 10a may be designated a cassette combination or assembly.
- Typewriter actuating means causes the type element to strike the cover-up tape against the unwanted character on the paper, and the cover-up tape is transferred to and covers up the unwanted character.
- the components (not shown) in the second correction tape cassette 10a may include a supply roll of correcting tape, means for assuring the uniform withdrawal of correcting tape from the supply spool, and a take-up spool.
- the second correction tape cassette 10a also includes a flat portion 14a having a formation 46 illustrated as an opening in the left-hand portion, through which the tab 44 of the second typewriter ribbon cassette 2a extends when the cassettes are inserted into the typewriter.
- the shiftable bracket section 18 shown in Fig. 2 is the same bracket section shown in Fig. 1.
- the engagement of the tab formation 44 of the ribbon cassette 2a with the opening formation 46 of the second correct tape cassette 10a ensures that the cassettes are compatible with each other.
- the cassettes 2a and 10a are configured so that unless the formations 44 and 46 are in operational engagement, the cassettes will not be capable of being inserted in the bracket section 18. Consequently, the typewriter will be inoperable.
- cassette compatibility may further be assured in a typewriter which has an on-off switch means as illustrated in Figs. 3-7.
- Figs. 3, 5 and 7 show the first typewriter ribbon cassette 2 and the first correction tape cassette 10 of Fig. 1, thus in large part the same numerical reference numerals will be used in Figs. 3, 5 and 7 as were used in Fig. 1.
- Fig. 4 shows the second typewriter ribbon cassette 2a and second correction tape cassette 10a of Fig. 2, thus in large part the same numerical reference numerals will be used in Fig. 4 as were used in Fig. 2.
- the shiftable bracket section 18 has an opening 22 and an opening 24 in a front portion 26.
- a clip 28 is clamped to the shiftable bracket section 18.
- An on-off switch rocker 30 (the operation of which will be described hereinafter) is assembled to the shiftable bracket section 18 by means of a first finger 32 of the on-off switch rocker 30 extending through the opening 24 of shiftable bracket section 18.
- a notch 34 in switch rocker 30 receives a wall portion 36 of the opening 24.
- the first finger 32 seated against the wall portion 36 provides a first pivot point for the on-off switch rocker 30.
- a second finger 38 of the on-off switch rocker 30 extends through the opening 22 in shiftable bracket section 18 and abuts against a wall portion 40 of the opening 22 to provide a second pivot point for the on-off switch rocker 30.
- the second finger 38 is integrally molded with the on-off switch rocker 30 in such a manner that the second finger 38 is biased against the wall portion 40 and causes the first finger 32 to be biased against the wall portion 36 for holding the on-off switch rocker 30 assembled to the shiftable bracket section 18.
- the first pivot point of the first finger 32 is substantially in alignment with the second pivot point of the second finger 38 to provide a common axis 42 for pivoting the on-off switch rocker 30 relative to the shiftable bracket section 18.
- the shiftable bracket section 18 shown in Fig. 4 is the same bracket section shown in Fig. 3.
- the on-off switch rocker 30 shown in Fig. 5 includes a generally planar portion 48 having two rearwardly extending arms 50 on which an upwardly extending right-hand finger 52 and an upwardly extending left-hand finger 54 are located.
- a spring means 56 is connected at one end to the on-off switch rocker 30 and at its opposite end to the shiftable bracket section 18 at spring aperture 58. The spring 56 biases the on-off switch rocker 30 counterclockwise about the common axis 42.
- a switch 60 has a first switch contact 62 and a second switch contact 64.
- the first switch contact 62 is securely mounted on the on-off switch rocker 30.
- the first switch contact 62 has an elongated contact surface with the elongation arranged substantially parallel relative to the common axis 42.
- the second switch contact 64 is securely mounted on the clip 28 which is assembled to the shiftable bracket section 18.
- the second switch contact 64 has an elongated contact surface with the elongation arranged substantially perpendicular relative to the first switch contact 62.
- the contacts may be of different shapes, it has been found desirable to make the shapes elongated to reduce the manufacturing tolerances required to have the first switch contact 62 efficiently contact the second switch contact 64 during initial assembly and during continual typewriter operation thereafter.
- the first and second switch contacts 62 and 64 are connected to electronics 66 mounted in the typewriter by lead lines 68.
- the electronics 66 is connected to a power source for controlling the flow of electricity to the typewriter.
- the spring 56 biases the on-off switch rocker 30 counterclockwise relative to the shiftable bracket section 18 to bias the first switch contact 62 in contact with the second switch contact 64 for closing the switch 60.
- the switch 60 is closed when neither the first typewriter ribbon cassette 2 nor the second typewriter ribbon cassette 2a is inserted in the typewriter.
- the electronics 66 senses that the switch 60 is closed and thereby prevents the flow of electricity to the typewriter.
- the tab 8 contacts the right-hand finger 52 and pivots the on-off switch rocker 30 clockwise relative to the shiftable bracket section 18 to open the switch 60.
- the tab 44 contacts the left-hand finger 54 and pivots the on-off switch rocker 30 clockwise to open the switch 60 (Fig. 4 ).
- the electronics 66 senses that the switch 60 is open, it permits the flow of electricity to the typewriter.
- the flow of electricity to the typewriter will only occur when the left-hand tab 44 can extend through the left-hand opening 46 in the flat portion 14a in compatible second correction tape cassette 10a. If, however, instead of second correction tape cassette 10a being present in the typewriter, incompatible first correction tape cassette 10 is present, which has only the right-hand opening 16 in the flat portion 14, the tab 44 cannot extend downwardly to pivot the on-off switch rocker 30 clockwise and the flow of electricity to the typewriter cannot occur.
- the flow of electricity will not occur when either the first typewriter ribbon cassette 2 and the second correction tape cassette 10a, or the second typewriter ribbon cassette 2a and the first correction tape cassette 10 are present in the typewriter.
Description
- This invention is directed to systems including devices, such as typewriters, which utilize at least two different cassettes, such as a typewritter ribbon cassette and a correction cassette.
- Various prior art devices disclose means by which the operability of a typewriter or printer is controlled by the condition or type of cassette present in the typewriter or printer. U.S. Pat. No. 4,636,097, for example, includes means for rendering the printer inoperable when the end of the typewriter ribbon in a cassette is sensed, or when there is no cassette in the printer. Another such device is disclosed in IBM Technical Disclosure Bulletin, Vol. 25, No. 4, September 1982. The cassette disclosed therein provides a signal to the device (such as a typewriter) which identifies the contents of the cassette, so that the device may adjust to the characteristics of the cassette contents. Still another such device is disclosed in U.S. Pat No. 4,516,137 wherein the presence or absence of a thermal ribbon cassette is sensed by the printer. If a thermal ribbon cassette is present, the printer can print only undirectionally, whereas when the ribbon cassette is not present, the printer prints bi-directionally.
- Patent Abstracts of Japan, Vol. 10, No. 216 (M-502) [2272], re. JP-A1-6154975, describes a system wherein the presence or absence of a detector on an ink ribbon cassette in a device is used (via a selection switch 24) to select an appropriate printing pressure in that device.
- Patent Abstracts of Japan Vol. 9, No. 98 (M-375) [1821], re JP-A-59222380, describes a system wherein a tab/pair of tabs is provided on each monocolour ribbon cassette of the system so as to activate switches when inserted into a device to identify to that device the colour of the ribbon in the inserted cassette.
- There are, in addition, prior art devices which disclose means for connecting a ribbon cassette to a correcting cassette. Examples of such prior art devices are U.S. Pat. No. 4,239,107 and U.S. Pat. No. 4,302,118. The '118 patent discloses mating formations adapted to place a ribbon cassette in register with a correcting cassette, and also discloses means on the cassette which control the selection of the correct feed and ribbon lift mechanism.
- Unlike the present invention none of the above described pieces of prior art discloses the provision of means for making certain that in devices such as typewriters, which may utilize at least two different cassettes, such as a ribbon cassette and a correcting cassette, the cassettes are functionally compatible with each other.
- In common practice, a typewriter ribbon cassette includes a plastic jacketing in which the ribbon and various components are conveniently housed. These components may include, among other things, a supply spool upon which a supply of typewriter ribbon is located, mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located. A typewriter drive mechanism rotates the take-up spool to cause fresh ribbon from the supply spool to advance to the print point. A typewriter ribbon cassette of this type is disclosed in U.S Pat. No. 4,302,118.
- Such typewriter ribbon cassettes may contain various types of ribbons. For example, the ribbon may be of the single-strike carbon ribbon type or of the multiple-strike carbon ribbon type. If the ribbon is a single-strike carbon ribbon, the ribbon is incrementally fed in such a manner that upon a single character being typed on a portion of the ribbon, the ribbon is advanced so that the next character is typed on a fresh portion of the ribbon.
- If the ribbon is a multiple-strike ribbon, such as the "Multi-Strike" ribbon sold by Smith Corona Corporation, the ribbon is incrementally fed in such a manner that upon a character being typed on a ribbon, the ribbon is advanced a lesser distance so that the next character is typed on a ribbon portion comprising both a typed ribbon portion and a fresh ribbon portion. In this manner, significantly more characters may be typed on a multiple-strike ribbon than on a single-strike ribbon.
- A typewriter correcting cassette may also include a plastic jacketing for conveniently housing a correcting tape and various components. As in the typewriter ribbon cassette, the components of a correcting cassette may include a supply spool, means for assuring the uniform withdrawal of correcting tape from the supply spool, and a take-up spool. Here too, the correcting tape may be of two types, namely, the type commonly referred to as "lift-off" tape, in which the tape, upon striking the unwanted character, removes the unwanted character from the paper, or the type commonly referred to as "cover-up" tape, in which, upon the tape striking the unwanted character, a powdered material on the tape is transferred to and covers up the unwanted character on the paper.
- In the existing market, with few, if any, exceptions, lift-off correcting tape is only compatible with single-strike carbon ribbons, and cover-up correcting tape is only compatible with multiple-strike carbon ribbons. Each combination of cassettes having compatible ribbon and correcting tapes may be termed a cassette combination or assembly. Therefore, in a typewriter which permits the use of both single-strike and multiple-strike ribbons as well as both lift-off and cover-up correcting tapes, it is desirable to provide means to assure that the lift-off correcting tape is used only with single-strike carbon ribbons and that the cover-up tape is used only with multiple-strike ribbons. The present invention is directed to means for providing a simple, reliable means to assure that the lift-off tape cassette can be used only with the single-strike ribbon cassette and that the cover-up tape cassette can be used only with the multiple-strike ribbon cassette.
- That is achieved, in general, by providing the cassette with means for assuring that the cassette is functionally compatible with the corresponding second cassette of the combination or assembly upon the cassettes being inserted into a device, such as a typewriter in a system which utilizes the cassettes.
- According to the present invention, if it is attempted to utilize a cassette having the foregoing means with a second cassette which is not compatible with that cassette, i.e., of a different cassette combination, the means for assuring cassette compatibility will prevent the first cassette from being properly placed in the device and indicating to the operator that an attempt is being made to place into the device a cassette which is not compatible with another being so placed.
- The present invention provides a system utilising a cassette assembly including selectively combinable first and second cassettes, said system comprising in combination:
a device in which an assembly of a first and a second cassette are inserted for operation of the device;
a first cassette for use in said device,said first cassette having an ink ribbon; and
a second cassette for use in said device, said second cassette having a correction tape ;
characterised in that there is further provided compatibility means comprising:
a first structural feature provided on said first cassette at a location corresponding to the type of ink ribbon in said first cassette,
a second structural feature provided on said second cassette at a location corresponding to the type of correction tape in said second cassette,
the first and second structural features being adapted for inhibiting the proper mounting of said first and second cassettes in the device unless the ink ribbon in the first cassette is compatible with the correction tape in the second cassette. - The present invention further provides a method for assembling a system including a device and at least one assembly of selectively combinable first and second cassettes adapted for insertion into the device, the method comprising the steps of:
providing the first cassette with an ink ribbon ;
providing the second cassette with a correction tape ; and
inserting the first and second cassettes into the device;
characterised in that there is further provided the step of providing on said cassettes compatibility means, said compatibility means being disposed on said first and second cassettes in assembly-specific locations corresponding to the type of ribbon in said first cassette and the type of correction tape in said second cassette for inhibiting cassettes having incompatible ink ribbon and correction tape combinations from being properly placed in said device. - Cassette compatibility is also achieved, in general, by providing a switch means in the typewriter, printer, or the like, which controls the on - off condition of the typewriter, and means located on the ribbon cassette that activates the on-off typewriter switch means. According to the present invention, the ribbon cassette activating means will not activate the on-off typewriter switch when functionally incompatible cassettes are present in the typewriter. In other words, the ribbon cassette activating means will activate the on-off typewriter switch only when either a single-strike ribbon cassette and a cover-up correction tape cassette are present in the typewriter or when a multiple-strike ribbon cassette and a lift-off correction tape cassette are present in the typewriter.
- A further understanding of the present invention may be had when the following detailed description is read in conjunction with the accompanying drawings, in which:
- FIG. 1 is an exploded top perspective view of the present invention showing a cassette combination including a first typewriter ribbon cassette, a first correction tape cassette, and a partial view of a shiftable bracket section which carries the ribbon cassette and correction tape thereon;
- FIG. 2 is an exploded top perspective view of the present invention showing a cassette combination including a second typewriter ribbon cassette, a second correction tape cassette, and a partial view of a shiftable bracket section which carries the ribbon cassette and correction tape thereon;
- Fig. 3 is an exploded top perspective view of the cassette combination of Fig. 1 used in a typewriter having an on-off switch mechanism with which the cassette combination may interact;
- Fig. 4 is an exploded top perspective view of the cassette combination of Fig. 2 used in a typewriter having an on-off switch mechanism with which the cassette combination may interact;
- Fig. 5 is an exploded top perspective view of the present invention used in a typewriter having an on-off switch mechanism and shows a partial view of the switch activating means located on the first typewriter ribbon cassette, a partial view of the shiftable bracket section which carries the ribbon cassette and correction tape thereon, and the on-off switch;
- Fig. 6 is a side elevational view of the present invention used as in Fig. 5, showing an on-off switch in its normally closed position whereby power cannot be supplied to the device; and
- Fig. 7 is a side elevational view of the present invention used as in Fig. 5, showing an on-off switch in its normally opened position whereby power can be supplied to the device.
- There is shown in Fig. 1 a first
typewriter ribbon cassette 2 having ahousing 4 within which a first typewriter ribbon 6 (which may be of the single-strike carbon ribbon type), and various other components, are housed. Aformation 8, such as a tab, extends from the right-hand portion of the bottom of thehousing 4 for a purpose to be described hereinafter. As noted above, a single-strike carbon ribbon is of the type which is incrementally fed in such a manner that upon a character being typed on a ribbon portion, the ribbon is advanced so that the next character is typed on a fresh portion of the ribbon. These components, not shown, may include, among other things, a supply spool upon which a typewriter ribbon supply is located, a mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located. Such a cassette is presently being sold by Smith Corona Corporation under its "H Correctable" mark. - Also in Fig. 1, there is disclosed a first
correction tape cassette 10 which is functionally compatible with the firsttypewriter ribbon cassette 2, and within which afirst correction tape 12 of, for example, the lift-off type, together with other components, is housed. Theribbon cassette 2 and the functionallycompatible correction cassette 10 may be designated a cassette combination or assembly. In operation, to delete an unwanted typed character from a document, the lift-off tape is raised to the print point over the character, and the unwanted character on the type element is positioned to strike the lift-off tape. Typewriter actuating means causes the type element to strike the lift-off tape against the unwanted character on the paper, and the lift-off tape withdraws the unwanted character from the paper. - The components (not shown) in the first
correction tape cassette 10 may include a supply roll of correcting tape, means for assuring the uniform withdrawal of correcting tape from the supply spool and a take-up spool. The firstcorrection tape cassette 10 also includes aflat portion 14 having aformation 16 illustrated as an opening, in the right-hand portion, through which thetab formation 8 of the firsttypewriter ribbon cassette 2 extends when the cassettes are inserted into the typewriter. - Fig. 1 further discloses a
shiftable bracket section 18 adapted to operationally accommodate the firsttypewriter ribbon cassette 2 and the firstcorrection tape cassette 10 thereon. Theshiftable bracket section 18 is pivotable about pivot points 20 by conventional typewriter means (not shown) for presenting either thefirst typewriter ribbon 6 or the lift-offfirst correction tape 12 to the typewriter print point. The engagement of thetab formation 8 of theribbon cassette 2 with the openingformation 16 of the firstcorrect tape cassette 10 ensures that the cassettes are compatible with each other. Thecassettes formations - Fig. 2 shows a second typewriter ribbon cassette 2a and a second correction tape cassette 10a which are generally similar in construction to the first
typewriter ribbon cassette 2 and thefirst correction tape 10 shown in Fig. 1. Therefore, in large part, the same numerical reference numerals will be used in Fig. 2 as were used in Fig. 1, except that the letter "a" will be added to the reference numerals of Fig. 2. - There is shown in Fig. 2 the second typewriter ribbon cassette 2a having a housing 4a within which a second typewriter ribbon 6a, which may be of the multiple-strike carbon ribbon type, and various other components are housed. A formation 44 such as a tab extends from the left-hand portion of the bottom of the housing 4a for the purpose to be hereinafter described. As noted above, a multiple-strike carbon ribbon is of the type which is incrementally fed in such a manner that upon a character being typed on a ribbon portion, the ribbon is advanced so that the next character is typed on a ribbon portion comprising both a typed ribbon portion and a fresh ribbon portion. These components (not shown) may include, among other things, a supply spool upon which a typewriter ribbon supply is located, mechanism for assuring the uniform withdrawal of ribbon from the supply spool to the typewriter print point, and a take-up spool on which the typed ribbon is located. Such a cassette is presently being sold by Smith Corona Corporation under its "H Multi-Strike" mark.
- There is further shown in Fig. 2 the second correction tape cassette 10a which is functionally compatible with the second typewriter ribbon cassette 2a, and within which a second correction tape 12a of, for example, the cover-up type, together with other components, is housed. The ribbon cassette 2a and the functionally compatible correction cassette 10a may be designated a cassette combination or assembly. In operation, to delete an unwanted typed character from a document, the cover-up tape is raised to the print point over the character, and the unwanted character on the type element is positioned to strike the cover-up tape. Typewriter actuating means causes the type element to strike the cover-up tape against the unwanted character on the paper, and the cover-up tape is transferred to and covers up the unwanted character.
- The components (not shown) in the second correction tape cassette 10a may include a supply roll of correcting tape, means for assuring the uniform withdrawal of correcting tape from the supply spool, and a take-up spool. The second correction tape cassette 10a also includes a flat portion 14a having a
formation 46 illustrated as an opening in the left-hand portion, through which the tab 44 of the second typewriter ribbon cassette 2a extends when the cassettes are inserted into the typewriter. Theshiftable bracket section 18 shown in Fig. 2 is the same bracket section shown in Fig. 1. The engagement of the tab formation 44 of the ribbon cassette 2a with the openingformation 46 of the second correct tape cassette 10a ensures that the cassettes are compatible with each other. The cassettes 2a and 10a are configured so that unless theformations 44 and 46 are in operational engagement, the cassettes will not be capable of being inserted in thebracket section 18. Consequently, the typewriter will be inoperable. - In operation, downward movement of the
tab formation 8, will only occur when the right-hand tab formation 8 can extend through the right-hand opening formation 16 in theflat portion 14 in compatible firstcorrection tape cassette 10. If, however, instead of the firstcorrection tape cassette 10 being present in the typewriter, an incompatible correction tape cassette, such as second correction tape cassette 10a, is present, which has no opening or only a left-hand opening formation 46 in the flat portion 14a, thetab formation 8 cannot extend downwardly through the opening, preventing seating of thefirst cassette 2 on the second correction tape, and immediately indicating to the operator, by the physical interference oftab 8 holding thefirst cassette 2 above and not squarely against correction tape cassette 10a, that an attempt has been made to place an incompatible cassette into the typewriter. - Similarly, with respect to the second typewriter ribbon cassette 2a, proper insertion of the cassette will only occur when the left-hand tab formation 44 can extend through the left-
hand opening formation 46 in the flat portion 14a in compatible second correction tape cassette 10a. If, however, instead of second correction tape cassette 10a being present in the typewriter, an incompatible first correction tape cassette is present, such as in thiscase cassette 10, which has only the right-hand opening 16 in theflat portion 14, the tab formation 44 cannot extend downwardly through the openingformation 46, preventing the seating of the second ribbon cassette upon the second correction tape cassette 10a. Thus, it will be seen that with respect to the embodiment shown in Figs. 1 and 2, the typewriter will not be operable when either the firsttypewriter ribbon cassette 2 and the second correction tape cassette 10a, or the second typewriter ribbon cassette 2a and the firstcorrection tape cassette 10 are present therein. - According to the present invention cassette compatibility may further be assured in a typewriter which has an on-off switch means as illustrated in Figs. 3-7.
- Figs. 3, 5 and 7 show the first
typewriter ribbon cassette 2 and the firstcorrection tape cassette 10 of Fig. 1, thus in large part the same numerical reference numerals will be used in Figs. 3, 5 and 7 as were used in Fig. 1. Fig. 4 shows the second typewriter ribbon cassette 2a and second correction tape cassette 10a of Fig. 2, thus in large part the same numerical reference numerals will be used in Fig. 4 as were used in Fig. 2. - As shown in Figures 3 and 5, the
shiftable bracket section 18 has anopening 22 and anopening 24 in afront portion 26. Aclip 28 is clamped to theshiftable bracket section 18. An on-off switch rocker 30 (the operation of which will be described hereinafter) is assembled to theshiftable bracket section 18 by means of afirst finger 32 of the on-off switch rocker 30 extending through theopening 24 ofshiftable bracket section 18. A notch 34 inswitch rocker 30 receives awall portion 36 of theopening 24. Thefirst finger 32 seated against thewall portion 36 provides a first pivot point for the on-off switch rocker 30. - A
second finger 38 of the on-off switch rocker 30 extends through theopening 22 inshiftable bracket section 18 and abuts against awall portion 40 of theopening 22 to provide a second pivot point for the on-off switch rocker 30. Thesecond finger 38 is integrally molded with the on-off switch rocker 30 in such a manner that thesecond finger 38 is biased against thewall portion 40 and causes thefirst finger 32 to be biased against thewall portion 36 for holding the on-off switch rocker 30 assembled to theshiftable bracket section 18. The first pivot point of thefirst finger 32 is substantially in alignment with the second pivot point of thesecond finger 38 to provide acommon axis 42 for pivoting the on-off switch rocker 30 relative to theshiftable bracket section 18. - The
shiftable bracket section 18 shown in Fig. 4 is the same bracket section shown in Fig. 3. The on-off switch rocker 30 shown in Fig. 5 includes a generally planar portion 48 having two rearwardly extendingarms 50 on which an upwardly extending right-hand finger 52 and an upwardly extending left-hand finger 54 are located. A spring means 56 is connected at one end to the on-off switch rocker 30 and at its opposite end to theshiftable bracket section 18 atspring aperture 58. Thespring 56 biases the on-off switch rocker 30 counterclockwise about thecommon axis 42. - A
switch 60 has afirst switch contact 62 and asecond switch contact 64. Thefirst switch contact 62 is securely mounted on the on-off switch rocker 30. Thefirst switch contact 62 has an elongated contact surface with the elongation arranged substantially parallel relative to thecommon axis 42. Thesecond switch contact 64 is securely mounted on theclip 28 which is assembled to theshiftable bracket section 18. Thesecond switch contact 64 has an elongated contact surface with the elongation arranged substantially perpendicular relative to thefirst switch contact 62. Although the contacts may be of different shapes, it has been found desirable to make the shapes elongated to reduce the manufacturing tolerances required to have thefirst switch contact 62 efficiently contact thesecond switch contact 64 during initial assembly and during continual typewriter operation thereafter. The first andsecond switch contacts electronics 66 mounted in the typewriter bylead lines 68. Theelectronics 66 is connected to a power source for controlling the flow of electricity to the typewriter. - Referring to Fig. 6, the
spring 56 biases the on-off switch rocker 30 counterclockwise relative to theshiftable bracket section 18 to bias thefirst switch contact 62 in contact with thesecond switch contact 64 for closing theswitch 60. Theswitch 60 is closed when neither the firsttypewriter ribbon cassette 2 nor the second typewriter ribbon cassette 2a is inserted in the typewriter. Theelectronics 66 senses that theswitch 60 is closed and thereby prevents the flow of electricity to the typewriter. - Referring to Fig. 7, when the first
typewriter ribbon cassette 2 is inserted into the typewriter, thetab 8 contacts the right-hand finger 52 and pivots the on-off switch rocker 30 clockwise relative to theshiftable bracket section 18 to open theswitch 60. Likewise, when the second typewriter ribbon cassette 2a is inserted into the typewriter, the tab 44 contacts the left-hand finger 54 and pivots the on-off switch rocker 30 clockwise to open the switch 60 (Fig. 4 ). When theelectronics 66 senses that theswitch 60 is open, it permits the flow of electricity to the typewriter. - Downward movement of the
tab 8, and thus the flow of electricity to the typewriter, will only occur when the right-hand tab 8 can extend through the right-hand opening 16 in theflat portion 14 in compatible firstcorrection tape cassette 10. If, however, instead of the firstcorrection tape cassette 10 being present in the typewriter, incompatible second correction tape cassette 10a is present, which has only a left-hand opening 46 in the flat portion 14a, thetab 8 cannot extend downwardly to pivot the on-off switch rocker 30 clockwise, and the flow of electricity to the typewriter cannot occur. - Similarly, with respect to the second typewriter ribbon cassette 2a, the flow of electricity to the typewriter will only occur when the left-hand tab 44 can extend through the left-
hand opening 46 in the flat portion 14a in compatible second correction tape cassette 10a. If, however, instead of second correction tape cassette 10a being present in the typewriter, incompatible firstcorrection tape cassette 10 is present, which has only the right-hand opening 16 in theflat portion 14, the tab 44 cannot extend downwardly to pivot the on-off switch rocker 30 clockwise and the flow of electricity to the typewriter cannot occur. Thus, it will be seen that with respect to the embodiment shown in Figs. 3 to 7, the flow of electricity will not occur when either the firsttypewriter ribbon cassette 2 and the second correction tape cassette 10a, or the second typewriter ribbon cassette 2a and the firstcorrection tape cassette 10 are present in the typewriter.
Claims (17)
- A system utilising a cassette assembly including selectively combinable first and second cassettes, said system comprising in combination:
a device in which an assembly of a first (2/2a) and a second (10/10a) cassette are inserted for operation of the device;
a first cassette (2/2a) for use in said device, said first cassette having an ink ribbon (6/6a); and
a second cassette (10/10a) for use in said device, said second cassette having a correction tape (12/12a);
characterised in that there is further provided compatibility means comprising:
a first structural feature (8/44) provided on said first cassette (2/2a) at a location corresponding to the type of ink ribbon (6/6a) in said first cassette,
a second structural feature (16/46) provided on said second cassette (10/10a) at a location corresponding to the type of correction tape (12/12a) in said second cassette,
the first (8/44) and second (16/46) structural features being adapted for inhibiting the proper mounting of said first and second cassettes in the device unless the ink ribbon in the first cassette is compatible with the correction tape in the second cassette. - The system in accordance with claim 1, wherein said first cassette (2/2a) includes a housing (4/4a), said first structural feature (8/44) being located on said housing (4/4a) to depend therefrom.
- The system in accordance with claim 1 or 2 wherein said first cassette (2) of said cassette assembly has a single strike type carbon type ribbon (6) and said second cassette (10) has a lift-off type correcting tape (12).
- The system in accordance with claim 1 or 2 wherein said first cassette (2a) of said cassette assembly includes a multiple-strike type carbon ribbon (6a) and said second cassette (10a) has a cover-up type correction tape (12a).
- The system in accordance with claim 3 or 4, wherein said compatibility means includes said first cassette (2/2a) having a depending tab formation (8/44) and said second cassette (10/10a) having an opening formation (16/46), said tab formation (8/44) engaging said opening formation (16/46).
- A system in accordance with any previous claim, wherein the compatibility means includes said first cassette (2/2a) having a tab (8/44) thereon which may be located on one of at least two portions of said first cassette (2/2a), said location being dependent upon the particular type of ink ribbon (6/6a) in the first cassette (2/2a), and
said second cassette (10/10a) having an opening (16/46) therein which may be located in either one of two portions of said cassette (10/10a), said location being dependent upon the particular type of correction tape (12/12a) in second cassette (10/10a); and
wherein the location of the first cassette tab (8/44) and the location of the second cassette opening (16/46) are in alignment to permit the first cassette tab (8/44) to extend through the second cassette opening (16/46) only when the particular type of ink ribbon (6/6a) in said first cassette (2/2a) is functionally compatible with the particular type of correction tape (12/12a) in the second cassette (10/10a). - The system in accordance with claim 5 or 6, wherein the tab (8/44) is on the right-hand side of the first cassette (2/2a) and wherein the opening (16/46) in the second cassette (10/10a) is on the right-hand side of the second cassette (10/10a).
- The system in accordance with claim 5 or 6, where the tab portion (8/44) is on the left-hand side of the first cassette (2/2a) and wherein the opening (16/46) in the second cassette (10/10a) is on the left-hand side of the second cassette (10/10a).
- The system in accordance with any previous claim, and further comprising a switch (60) mounted on said device and connected to a power source for controlling the flow of electricity to said device; wherein the compatibility means (8, 16/44, 46) is adapted to enable operation of the switch (60) to permit the flow of electricity from the power source to said device to activate said device only when the ink ribbon (6/6a) in the first cassette (2/2a) is compatible with the correction tape (12/12a) in the second cassette (10/10a).
- The system in accordance with claim 9 wherein the first (2/2a) and second (10/10a) cassettes are carried by a bracket section (18) on said device, said bracket section including said switch (60).
- The system in accordance with any previous claim, wherein the device is a typewriter.
- A method for assembling a system including a device and at least one assembly of selectively combinable first (2/2a) and second (10/10a) cassettes adapted for insertion into the device, the method comprising the steps of:
providing the first cassette (2/2a) with an ink ribbon (6/6a);
providing the second cassette (10/10a) with a correction tape (12/12a); and
inserting the first (2/2a) and second (10/10a) cassettes into the device;
characterised in that there is further provided the step of providing on said cassettes (2, 10/2a, 10a) compatibility means (8, 16/44, 46), said compatibility means (8, 16/44, 46) being disposed on said first (2/2a) and second (10/10a) cassettes in assembly-specific locations corresponding to the type of ribbon (6/6a) in said first cassette (2/2a) and the type of correction tape (12/12a) in said second cassette (10/10a) for inhibiting cassettes having incompatible ink ribbon and correction tape combinations from being properly placed in said device. - The method in accordance with claim 12, further comprising the step of providing the device with a switch (60) operable to activate the device, and
wherein the step of providing said compatibility means (8, 16/44, 46) on said cassettes (2, 10/2a, 10a) comprises providing compatibility means (8, 16/44 46) adapted, on insertion of the first (2/2a) and second (10/10a) cassettes into the device, to enable operation of said switch (60) to activate the device if the ink ribbon (6/6a) of the first cassette (2/2a) is compatible with the correction tape (12/12a) of the second cassette (10/10a). - The method according to claim 12 or 13, wherein the step of providing compatibility means (8, 16/44, 46) on said cassettes (2, 10/2a, 10a) comprises providing a tab (8/44) on said first cassette (2/2a).
- The method according to claim 12, 13 or 14, wherein the step of providing compatibility means (8, 16/44, 46) on said cassettes (2, 10/2a, 10a) comprises providing an opening (16/46) on said second cassette (10/10a).
- The method according to any one of claims 12 to 15, wherein the step of providing the first cassette (2/2a) with an ink ribbon (6/6a) comprises providing the first cassette (2) with a single strike type carbon ribbon (6), and the step of providing the second cassette (10/10a) with a correction tape (12/12a) comprises providing the second cassette (10) with a lift-off type correction tape (12).
- The method according to any one of claims 12 to 15, wherein the step of providing the first cassette (2/2a) with an ink ribbon (6/6a) comprises providing the first cassette (2a) with a multiple-strike type carbon ribbon (6a), and the step of providing the second cassette (10/10a) with a correction tape (12/12a) comprises providing the second cassette (10a) with a cover-up type correction tape (12a).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/126,152 US4900171A (en) | 1987-11-30 | 1987-11-30 | Ink ribbon and correction tape cassette compatibility |
US21498288A | 1988-07-05 | 1988-07-05 | |
EP19880311368 EP0319285B1 (en) | 1987-11-30 | 1988-11-30 | Cassette having compatibility arrangement |
US126152 | 1993-09-23 | ||
US214982 | 2002-08-07 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88311368.0 Division | 1988-11-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0449392A2 EP0449392A2 (en) | 1991-10-02 |
EP0449392A3 EP0449392A3 (en) | 1991-11-21 |
EP0449392B1 true EP0449392B1 (en) | 1994-05-18 |
Family
ID=26824340
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91201459A Expired - Lifetime EP0449392B1 (en) | 1987-11-30 | 1988-11-30 | System including ink ribbon and correction tape cassettes having a compatibility arrangement |
EP91201458A Expired - Lifetime EP0448184B1 (en) | 1987-11-30 | 1988-11-30 | Correction tape cassette having compatibility arrangement |
EP19880311368 Expired - Lifetime EP0319285B1 (en) | 1987-11-30 | 1988-11-30 | Cassette having compatibility arrangement |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91201458A Expired - Lifetime EP0448184B1 (en) | 1987-11-30 | 1988-11-30 | Correction tape cassette having compatibility arrangement |
EP19880311368 Expired - Lifetime EP0319285B1 (en) | 1987-11-30 | 1988-11-30 | Cassette having compatibility arrangement |
Country Status (3)
Country | Link |
---|---|
EP (3) | EP0449392B1 (en) |
DE (4) | DE319285T1 (en) |
SG (1) | SG62793G (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4302118A (en) * | 1977-05-27 | 1981-11-24 | International Business Machines Corporation | Typewriter cartridge and feed mechanism therefor |
DE3301933C2 (en) * | 1983-01-21 | 1985-03-07 | Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg | Device for lifting and transporting ribbon in writing machines and similar machines |
JPS59222380A (en) * | 1983-06-02 | 1984-12-14 | Fujitsu Ltd | Ribbon-discriminating mechanism for serial printer |
JPS6154975A (en) * | 1984-08-27 | 1986-03-19 | Oki Electric Ind Co Ltd | Printer |
-
1988
- 1988-11-30 DE DE1988311368 patent/DE319285T1/en active Pending
- 1988-11-30 EP EP91201459A patent/EP0449392B1/en not_active Expired - Lifetime
- 1988-11-30 DE DE19883878853 patent/DE3878853T2/en not_active Expired - Fee Related
- 1988-11-30 EP EP91201458A patent/EP0448184B1/en not_active Expired - Lifetime
- 1988-11-30 DE DE19883889673 patent/DE3889673T2/en not_active Expired - Fee Related
- 1988-11-30 EP EP19880311368 patent/EP0319285B1/en not_active Expired - Lifetime
- 1988-11-30 DE DE19883850579 patent/DE3850579T2/en not_active Expired - Fee Related
-
1993
- 1993-05-12 SG SG62793A patent/SG62793G/en unknown
Also Published As
Publication number | Publication date |
---|---|
EP0449392A2 (en) | 1991-10-02 |
DE3889673T2 (en) | 1994-12-15 |
EP0319285B1 (en) | 1993-03-03 |
DE3850579D1 (en) | 1994-08-11 |
EP0319285A3 (en) | 1990-04-11 |
EP0319285A2 (en) | 1989-06-07 |
DE3889673D1 (en) | 1994-06-23 |
SG62793G (en) | 1993-08-06 |
EP0448184B1 (en) | 1994-07-06 |
DE319285T1 (en) | 1990-11-08 |
DE3850579T2 (en) | 1995-02-09 |
EP0448184A2 (en) | 1991-09-25 |
EP0449392A3 (en) | 1991-11-21 |
EP0448184A3 (en) | 1991-11-13 |
DE3878853T2 (en) | 1993-07-15 |
DE3878853D1 (en) | 1993-04-08 |
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