EP2097266B1 - Détection d'impression thermique double face - Google Patents

Détection d'impression thermique double face Download PDF

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Publication number
EP2097266B1
EP2097266B1 EP07748859A EP07748859A EP2097266B1 EP 2097266 B1 EP2097266 B1 EP 2097266B1 EP 07748859 A EP07748859 A EP 07748859A EP 07748859 A EP07748859 A EP 07748859A EP 2097266 B1 EP2097266 B1 EP 2097266B1
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EP
European Patent Office
Prior art keywords
media
print
thermal
printer
printing
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.)
Active
Application number
EP07748859A
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German (de)
English (en)
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EP2097266A1 (fr
EP2097266A4 (fr
Inventor
Dale R. Lyons
Richard E. Brown
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.)
NCR Voyix Corp
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NCR Corp
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Publication date
Priority claimed from US11/644,262 external-priority patent/US8670009B2/en
Application filed by NCR Corp filed Critical NCR Corp
Publication of EP2097266A1 publication Critical patent/EP2097266A1/fr
Publication of EP2097266A4 publication Critical patent/EP2097266A4/fr
Application granted granted Critical
Publication of EP2097266B1 publication Critical patent/EP2097266B1/fr
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Classifications

    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/009—Detecting type of paper, e.g. by automatic reading of a code that is printed on a paper package or on a paper roll or by sensing the grade of translucency of the paper
    • 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
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material

Definitions

  • dual-sided direct thermal printing Two, or dual-sided direct thermal printing of documents such as transaction documents and receipts is described in U.S. Patent Nos. 6,784,906 and 6,759,366 .
  • the printers are configured to allow concurrent printing on both sides of thermal media moving along a feed path through the printer.
  • a direct thermal print head is disposed on each side of the media along the feed path. In operation each thermal print head faces an opposing platen across the media from the respective print head.
  • a print head selectively applies heat to paper or other sheet media comprising a substrate with a thermally sensitive coating.
  • the coating changes color when heat is applied, by which "printing" is provided on the coated substrate.
  • the sheet media substrate may be coated on both sides.
  • a dual-sided direct thermal printer according to claim 1.
  • Dual-sided direct thermal printing provides for printing of variable information on both sides of a print media, such as a receipt, to save materials, and to provide flexibility in providing information to customers.
  • the printing can be driven electronically or by computer using a computer application program which directs dual-sided printing.
  • Figure 1A shows a schematic of a dual-sided imaging direct thermal printer useable for dual-sided printing of thermal media such as transaction receipts or tickets.
  • Figure 1B shows a schematic of a dual-sided imaging direct thermal printer with one or more sensors for determining media type.
  • Figure 1C shows an alternate schematic of a dual-sided imaging direct thermal printer with one or more sensors for determining media type.
  • Figure 1D shows a further schematic of a dual-sided imaging direct thermal printer with one or more sensors for determining media type.
  • Figure 1E shows a method of performing a print media check by a dual-sided imaging thermal printer.
  • Figure 2A shows single-sided thermal media having a warning message printed on a first, thermal side, after a failed attempt to thermally image a second, non-thermal side.
  • Figure 2B shows two-sided thermal media having a message printed on a second side after a successful attempt to thermally image a first side.
  • Figure 2C shows non-thermal media after a failed attempt to thermally image first and second non-thermal sides.
  • Figure 2D shows two-sided thermal media after an image in the form of a logo is thermally printed on a first and a second side thereof.
  • Figure 3A shows a two-sided receipt with transaction detail printed on the front side.
  • Figure 3B shows the receipt of Figure 3A with supplemental information printed on the reverse side, such as variable stored information selected on the basis of the transaction detail.
  • Figure 3C shows a two-sided receipt with a portion of the associated transaction detail printed on the front side of the receipt.
  • Figure 3D shows the reverse side of the receipt of Figure 3C on which the remaining portion of the associated transaction data is printed.
  • Figure 4 shows a perspective view of an exemplary dual-sided direct thermal receipt printer for retail Point of Sale (POS) application.
  • POS Point of Sale
  • Figure 5 schematically shows a partial centerline cross-sectional view of the dual-sided direct thermal receipt printer of Figure 4 .
  • Figure 6 schematically shows a partial gear plane cross-sectional view of the dual-sided direct thermal receipt printer of Figure 4 .
  • Figure 7 schematically shows a partial centerline cross-sectional view of the dual-sided direct thermal receipt printer of Figure 4 , with a cover in an open position.
  • Figure 8 schematically shows a partial centerline cross-sectional view of a variation of the dual-sided direct thermal receipt printer of Figure 4 .
  • Figure 9 schematically shows a partial gear plane cross-sectional view of the dual-sided direct thermal receipt printer of Figure 8 .
  • Figure 10 schematically shows a partial centerline cross-sectional view of a variation of the dual-sided direct thermal receipt printer of Figure 4 .
  • Figure 11 schematically shows a partial gear plane cross-sectional view of the dual-sided direct thermal receipt printer of Figure 10 .
  • Figure 12 schematically shows a partial centerline cross-sectional view of a further variation of the dual-sided direct thermal receipt printer of Figure 4 .
  • Figure 13 schematically shows a further variation in a dual-sided direct thermal printer print head and platen orientation, and media feed path.
  • Figure 14 schematically shows a further variation in a dual-sided direct thermal printer print head and platen orientation, and media feed path.
  • Figure 1A shows a schematic of a dual-sided imaging direct thermal printer 10 useable for dual-sided printing of, for example, transaction receipts or tickets at time of issue.
  • the printer 10 operates on print media 20 comprising, for example, double-sided thermal paper, e.g., comprising a cellulosic or polymer substrate sheet coated on each side with heat sensitive dyes as described in U.S. Patent Numbers 6,784,906 and 6,759,366 .
  • Substrates and heat sensitive color changing coatings for direct thermal printing media are generally well known in the art.
  • Dual-sided direct thermal printing can be facilitated by a media 20 which includes dyes on opposite sides of the media 20, and a sufficiently thermally resistant substrate to inhibit thermal printing on one side of the media 20 from affecting coloration on the opposite side of the media 20.
  • the thermal print media 20 may be supplied in the form of a paper roll, fan-fold stack, individual sheet and the like, upon which printing such as graphics or text, or both, may be printed on one or both sides of the media 20, to provide, for example, a voucher, coupon, receipt, ticket or other article or document.
  • the printer 10 has rotating platens 30 and 40 and opposing thermal print heads 50 and 60 on opposite sides of the thermal media 20.
  • Dual-sided direct thermal printing of the media 20 may occur in a single pass at, for example, completion of a transaction such as when a receipt or ticket is issued. Alternately, dual-sided direct thermal printing may occur in a two or more pass process where, for example, the media 20 is imaged by one or both thermal print heads 50 and 60 when moving in a first direction, and then retracted for further imaging by one or both thermal print heads 50 and 60 with the media moving in either the first or a second, retract direction.
  • the media 20 may, depending on its format (e.g ., roll, fan fold, individual sheets, and the like), be manually or automatically cut or severed to provide an individual receipt, ticket, or other document.
  • a dual-sided imaging direct thermal printer 10 may further include a switch 70 enabling activation and deactivation of one or more dual-sided printing modes or functions.
  • Such dual-sided printing function switch 70 can be a mechanically operated switch on the printer 10, or an electronically operated switch operated by a printer driver on an associated host computer or by firmware or software resident on the printer 10, and the like.
  • the switch 70 may, for example, be electronically operated in response to a command message or escape sequence transmitted to the printer 10.
  • Printer control language or printer job language (“PCL/PJL”), or escape commands, and the like may be used.
  • a printer setup configuration program setting e.g., a setting made through a software controlled utility page implemented on an associated host computer, could also electronically operate the function switch 70 for the dual-sided printer 10.
  • the dual-sided printing function switch 70 may be configured, programmed or otherwise setup to select or otherwise identify (1) data for printing (e.g ., internally stored macros, externally received transaction data, and the like), (2) which of the two thermal print heads 50 and 60 will be used to print and/or be used to print particular data, (3) whether selected data is to be printed when the media is moving in a first ( e.g ., forward) or second ( e.g ., backward) direction, (4) in which relative and/or absolute media location, including on which media side, particular data will be printed, (5) in which orientation ( e.g ., rightside-up, upside-down, angled, and the like) particular data will be printed on the media 20, and the like.
  • data for printing e.g ., internally stored macros, externally received transaction data, and the like
  • second e.g ., backward
  • relative and/or absolute media location including on which media side, particular data will be printed
  • orientation e.g ., rightside-up
  • a setting of the dual-sided printing function switch 70 may marshal a portion (e.g ., a first half) of a block of selected externally received and/or internally stored print data to be printed on a first (e.g ., front) side of the media 20 and another portion (e.g., a second half) to be printed on a second (e.g., reverse) side of the media 20.
  • a further setting may reverse the media sides on which the respective portions of data are to be printed.
  • a dual-sided printing function switch may accordingly be configured, e.g., by a control command message transmitted to the printer 10, to determine, inter alia, the portion or quantity of data, or a block of data, to be printed on each side of the media. Different blocks of data, or portions thereof, may be alternatively selected and marshaled to different sides, or locations thereon, of the media 20 by the switch 70.
  • a printing function switch 70 may select a first portion of print data for printing on a first side of thermal media 20, such as a receipt paper roll, and a second portion of print data for printing on a second side of the thermal media 20.
  • print data may comprise data contemporaneously received by the printer 10 from a host computer such as a point-of-sale (POS) terminal (not shown), an automated teller machine (ATM) (not shown), a self-checkout system (not shown), and the like, and/or data stored in one or more memory or buffer locations 80 in the printer 10.
  • POS point-of-sale
  • ATM automated teller machine
  • self-checkout system not shown
  • print data may be (1) processed for printing before receipt by or storage in the printer 10 by, for example, a host computer such as a POS terminal, (2) processed for printing after receipt by or storage in the printer 10 by, for example, the printing function switch 70, or a controller or processor 90 associated with the printer 10, or (3) a combination of (1) and (2), among others.
  • processing may occur before or after selection, identification and/or apportionment of the print data for printing on the first and/or second side of thermal media 20 by the printing function switch 70.
  • a printing function switch 70 may be configured to select or otherwise identify print data for printing at a specified location, including a side, of the print media 20 based upon a quantity of media required to print such data. Such quantity may be determined based on, inter alia, (1) a physical, as-printed size (e.g., length, width, perimeter, area, font size, and the like) of the to-be-printed data, (2) a portion of the media 20 that is thermally imageable ( e.g ., a portion having one or more thermally sensitive coatings), (3) a portion of the media 20 which is pre-printed or pre-imaged, (4) a portion of the media 20 which is excluded or desired to be excluded from thermal or other imaging (e.g ., margins, headers, line spacings, indentations, desired or required blank space, and the like), (5) physical characteristics of the printer 10 (e.g ., size of the platens 30 and 40, size of the thermal print heads 50 and 60, spacing 35 of the platen
  • a printing function switch 70 may apportion a first portion of print data for printing on a first side of media 20 and a second portion of print data for printing on a second side of the media 20, wherein the first and second portions are selected to occupy substantially the same amount of space on the respective first and second media sides when printed.
  • the printing function switch may apportion a first portion of print data for printing on a first side of the media 20 and a second portion of print data for printing on a second side of the media 20, opposite the first side, wherein the as-printed size of the first portion is selected to be greater than the as-printed size of the second portion.
  • Differences in the as-printed size of the first and second data portions may be selected to accommodate, inter alia, (1) differences in an amount of printable space (e.g ., accounting for margins, headers, footers, preprinted information, thermal coating coverage, and the like) between the first and the second sides of the media 20, (2) differences in the type of data (e.g ., internally stored macro versus externally received transaction, and the like) selected for printing on a given side, and (3) differences in thermal print head location on the first and the second sides of the media 20 (e.g., print head space 55).
  • an amount of printable space e.g ., accounting for margins, headers, footers, preprinted information, thermal coating coverage, and the like
  • differences in the type of data e.g ., internally stored macro versus externally received transaction, and the like
  • differences in thermal print head location on the first and the second sides of the media 20 e.g., print head space 55.
  • the printing function switch 70 may apportion a first portion of print data, such as ticket information, for printing on a first side of the media 20 and a second portion of print data, such as a legal information, for printing on a second side of the media 20, opposite the first side, wherein the as-printed size (e.g., printed area) of the first portion is selected to be greater than the as-printed size (e.g., printed area) of the second portion by an amount substantially equivalent to an amount of printable space (e.g., area) on the second side of the media 20 between the thermal print heads 50 and 60.
  • a first portion of print data such as ticket information
  • a second portion of print data such as a legal information
  • the as-printed size of the print data on a given side may be controlled by selection of an amount of data to be printed on a given side, selection of a size at which selected data is to be printed (e.g ., font, font size, and/or data scaling), and the like.
  • apportionment of print data may be made by a printing function switch 70 such that a length of media 20 along a media feed path ( e.g ., following the arrow at the top of Figure 1A ) to be occupied by print data on a first side of the media 20 differs from a length of the media 20 along the media feed path to be occupied by print data on a second side of the media 20, by a length substantially equivalent to a spacing 35 between platens 30 and 40, a length substantially equivalent to a spacing 55 between the thermal print heads 50 and 60, and the like.
  • a printing function switch 70 such that a length of media 20 along a media feed path (e.g ., following the arrow at the top of Figure 1A ) to be occupied by print data on a first side of the media 20 differs from a length of the media 20 along the media feed path to be occupied by print data on a second side of the media 20, by a length substantially equivalent to a spacing 35 between platens 30 and 40, a length substantially
  • first and second portions of data received by a printer 10, such as POS transaction data may be identified by the printing function switch 70 such that a length of a first side of print media 20, such as a receipt, to be occupied by the first portion of the print data is greater than a length of a second side of the print media 20 to be occupied by the second portion of the print data by a length substantially equivalent to a spacing 55 between the first and the second thermal print heads 50 and 60.
  • the received print data may be stored in one or more buffers 80 of the printer 10 before or after identification by the printing function switch 70 for printing on one or both sides of the media 20.
  • data selected or otherwise identified for printing on one or both sides of media 20 by the printing function switch 70 may include predefined print data or macros, such as one or more of a location identifier (e.g ., address), an establishment identifier (e.g., store), a computer identifier (e.g ., POS terminal), a logo, an advertisement, and the like, stored in one or more memories associated with the printer 10.
  • a location identifier e.g ., address
  • an establishment identifier e.g., store
  • a computer identifier e.g ., POS terminal
  • logo e.g., an advertisement, and the like
  • Such information may be selected for printing in advance of any contemporaneously received print data, such as transaction data received from a POS terminal, which is to be included on, for example, the same document or receipt.
  • predefined print data may be selected for printing on regions of the media 20 where it may otherwise be difficult or undesirable for printing of contemporaneous information to occur, such as a region of media 20 between the first and second thermal print heads 50 and 60, thereby maximizing use of the media 20.
  • the printing function switch 70 may apportion print data, including internally stored macros and/or received transaction data, among a first and a second side of the thermal media 20 in order to optimize use of the media. In performing such optimization, the printing function switch may control the as-printed size (e.g., font, font size, scaling, and the like) of selected print data. Likewise, the printing function switch 70 may take account of, inter alia, (1) media size and design parameters including desired or required headers, footers, margins, and the like, (2) thermally sensitive coating location(s), and (3) any information that may be preprinted on the media 20.
  • the printing function switch 70 may take account of, inter alia, (1) media size and design parameters including desired or required headers, footers, margins, and the like, (2) thermally sensitive coating location(s), and (3) any information that may be preprinted on the media 20.
  • such accounting may comprise the printing function switch 70 avoiding apportionment of some or all of the selected print data to certain media regions such as regions where preprinted data exists, apportioning of some or all of the selected print data to other media regions such as regions set off by one or more sensemarks, and the like.
  • one or more sensors 100 such as one or more optical sensors, may be used to sense regions of preprinted information and/or regions demarked by one or more sensemarks for making apportionment and non-apportionment decisions as part of such print media use optimization.
  • One or more sensors 100 are used to sense whether media in the printer is thermal media or non-thermal media and to ascertain a type of media 20 (e.g ., single-sided thermal, double-sided thermal, non-thermal, label, roll, fan-fold, preprinted, and the like) loaded into the printer 10. Signals from such sensors may then be used to, inter alia, provide notification to an operator of the type of media 20 in the printer 10, and/or enable or disable one or more functions of the printer 10 based on the sensed media type.
  • a type of media 20 e.g ., single-sided thermal, double-sided thermal, non-thermal, label, roll, fan-fold, preprinted, and the like
  • one or more sensors 100 may be used to sense whether thermal printing has occurred on one or both sides of installed media 20 after an attempt to image by a first and/or a second thermal print head 50 and 60.
  • a signal indicative of success or failure to sense expected thermal printing from the one or more sensors 100 may then be used to provide an indication of such success or failure to an operator, such as by providing an audible, visual and/or tactile notification, printing a message on one or more sides of the installed media, and/or sending a signal to an attached computer, such as a POS terminal, an ATM, a self-checkout system, and the like, for triggering generation of an operator notification.
  • a signal from the one or more sensors 100 may be used to enable or disable one or more dual-sided imaging direct thermal printer 10 functions, such as printing by one or more thermal print heads 50 and 60, advancement of the media 20, operation of a cutting mechanism (e.g ., knife blade mechanism 370 in Figure 5 ), motion (e.g ., rotation) of one or more platens 30 and 40, operation of a drive and/or stepper motor (not shown), and the like.
  • a cutting mechanism e.g ., knife blade mechanism 370 in Figure 5
  • motion e.g ., rotation of one or more platens 30 and 40
  • a drive and/or stepper motor not shown
  • one or more codes indicative of the success or failure to sense expected thermal printing on one or both sides of the installed media 20 may be saved to a memory or buffer 80 of the printer 10 for reporting, diagnostic and/or printer control (e.g ., print mode setting) use.
  • one or more sensors may be placed on one side of a print media feed path, proximate to a thermal print head, such as first thermal print head 50, for sensing, inter alia, one or more media properties, conditions or features.
  • the sensor 100 may be a motion sensor, a hall effect sensor, an infrared (IR) sensor, an ultraviolet (UV) sensor, a radio frequency (RF) sensor, a charge coupled device (CCD), and the like.
  • the sensor 100 comprises an optical sensor adapted to produce a signal indicative of printing, such as thermal printing, on print media 20.
  • an attempt may be made by the dual-sided imaging direct thermal printer 10 to thermally image the media 20 using the first thermal print head 50.
  • print data may be selected from a memory or buffer 80 for printing by the first thermal print head 50.
  • a print failure signal may be generated.
  • Such print failure signal may then be used to generate one or more internal (e.g ., printer 10) and/or external ( e.g ., connected computer or terminal) notifications for an operator, and/or enable and/or disable one or more printer 10 functions, such as disabling further printing by the first thermal print head 50.
  • one or more sensors such as a sensor 100
  • a signal from the sensor 100 does not match, to within a desired tolerance, a signal expected from the selected print data.
  • Such expected signal may be stored in a memory or buffer 80 of the printer 10, and compared to a signal from the sensor 100 by, for example, a controller or processor 90 associated with the printer 10.
  • controller or processor 90 may, then, generate a further signal indicative of the type of media installed in the printer 10 (e.g ., single-sided thermal, double-sided thermal, or non-thermal) on the basis of such comparison, which further signal may be used to provide an operator notification and/or automatically enable and/or disable one or more printer functions.
  • One or more generated operator notifications may indicate the media 20 is not thermally coated on the side of the media 20 sought to be imaged by the first print head 50 (e.g ., the media 20 is not double-sided thermal media).
  • a notification may further include an indication to an operator to replace the installed media 20 with proper (e.g ., double-sided thermal) media 20.
  • such indication may provide an operator with an option to continue using the installed media 20 with the first thermal print head 50 disabled from further printing.
  • such disablement may be automatic, and may require further printer 10 or operator input or action to override and/or otherwise change. Additional media types, such as single-sided thermal media coated on a side imageable by the first thermal print head 50 may also be selected and/or indicated for use.
  • operator input may be provided directly through one or more printer 10 input devices, such as one or more switches, accessible to an operator. Additionally or alternatively, operator input may be provided through, for example, an attached, operator accessible terminal, such as a POS terminal (not shown) adapted to send control and/or configuration information to the printer 10 in the form of, for example, one or more escape sequences. In one embodiment, operator input is provided through and/or maintained by a printing function switch 70.
  • one or more sensors may be placed on one side of a print media feed path, proximate to a thermal print head, such as second thermal print head 60, for sensing, inter alia, one or more media properties, conditions or features.
  • the sensor 102 may be a motion sensor, a hall effect sensor, an IR sensor, an UV sensor, a RF sensor, a CCD, and the like.
  • the sensor 102 comprises an optical sensor adapted to produce a signal indicative of printing, such as thermal printing, on print media 20.
  • an attempt may be made by the dual-sided imaging direct thermal printer 10 to thermally image the media 20 using the second thermal print head 60.
  • print data may be selected from a memory or buffer 80 for printing by the second thermal print head 60. If, after an attempt by the second thermal print head 60 to print the selected data, the sensor 102 does not sense the selected print data, a print failure signal may be generated. Such print failure signal may then be used to generate one or more internal (e.g., printer 10) or external ( e.g., connected computer or terminal) notifications for an operator, and/or disable one or more printer 10 functions, such as disabling further printing by the second thermal print head 60.
  • a print success signal may be generated. Such print success signal may then be used to generate one or more internal (e.g ., printer 10) or external (e.g ., connected computer or terminal) notifications for an operator, and/or disable and/or enable one or more printer 10 functions, such as enabling further printing by the second thermal print head 60.
  • internal e.g ., printer 10
  • external e.g ., connected computer or terminal
  • one or more sensors such as a sensor 102
  • a signal from the sensor 102 matches, to within a desired tolerance, a signal expected from the selected print data.
  • Such expected signal may be stored in a memory or buffer 80 of the printer 10, and compared to a signal from the sensor 100 by, for example, a controller or processor 90 associated with the printer 10.
  • controller or processor 90 may, then, generate a further signal indicative of the type of media installed in the printer 10 (e.g ., single-sided thermal, double-sided thermal, or non-thermal) on the basis of such comparison, which further signal may be used to provide an operator notification and/or automatically enable and/or disable one or more printer functions.
  • One or more such notifications may indicate the media 20 is thermally coated on the side of the media 20 sought to be imaged by the second thermal print head 60.
  • such notification may further include an indication to an operator that proper media 20 is installed In the printer 10 and continued printer 10 operation may proceed. Additionally or alternatively, such indication may provide an operator with an option to use the installed media 20 with the second thermal print head 60 enabled whether such operation was previously enabled or disabled.
  • enablement and/or disablement of one or more thermal print heads 50 and 60, or other printer component or functionality may automatically occur in response to a signal from one or more print sensors 100 and 102, and may require further printer 10 or operator action to thereafter change.
  • operation of a first and/or a second thermal print head 50 and 60 may be re-enabled following a prior, automatic disablement upon successful sensing of thermal printing by a sensor 100 or 102.
  • one or more sensors such as a first sensor 100 may be placed on a first side of a print media feed path, proximate to a thermal print head, such as a first thermal print head 50, for sensing, inter alia, one or more properties, conditions or features of a first side of print media 20, and one or more sensors, such as a second sensor 102, may be placed on a second side of the print media feed path, proximate to a thermal print head, such as a second thermal print head 60, for sensing, inter alia, one or more properties, conditions or features of a second side of the print media 20.
  • the sensors 100 and 102 may each comprise a motion sensor, a hall effect sensor, an IR sensor, an UV sensor, a RF sensor, a CCD, and the like.
  • each of the sensors 100 and 102 comprise an optical sensor adapted to produce a signal indicative of printing, such as thermal printing, on a respective side of installed print media 20.
  • first print data may be selected from a first memory or buffer 80 for printing by the first thermal print head 50
  • second print data may be selected from a second memory or buffer 80 for printing by the second thermal print head 60. If, after an attempt by the first thermal print head 50 to print it, the sensor 100 does not sense the selected first print data, a first print failure signal may be generated.
  • Such first print failure signal may then be used to generate one or more internal (e.g ., printer 10) or external (e.g ., connected computer or terminal) notifications for an operator, and/or to automatically enable or disable one or more printer 10 functions, such as further printing by the first thermal print head 50.
  • a second print failure signal may be generated by the sensor 102.
  • Such second print failure signal may then be used to generate one or more internal (e.g ., printer 10) or external (e.g ., connected computer or terminal) notifications for an operator, and/or to automatically enable or disable one or more printer 10 functions, such as further printing by the second thermal print head 60.
  • thermal media may be indicated by a first sensor 100
  • non-thermal media may be indicated by a second sensor 102, resulting in an indication of the installation of single-sided thermal media 20 oriented for printing on a first side by the printer 10.
  • a first thermal print head 50 may be manually or automatically enabled for printing while a second thermal print head 60 may be manually or automatically disabled for printing.
  • non-thermal media may be indicated by a first sensor 100
  • thermal media may be indicated by a second sensor 102, resulting in an indication of the installation of single-sided thermal media 20 oriented for printing on a second side by the printer 10.
  • a first thermal print head 50 may be manually or automatically disabled for printing while a second thermal print head 60 may be manually or automatically enabled for printing.
  • one or more operator notifications such as the printing of a message indicating single- or non-double sided thermal media is installed by a respective, operative thermal print head, may also be provided.
  • thermal media 20 may be indicated by both a first and a second sensor 100 and 102, resulting in an indication that double-sided thermal media is installed for printing on both a first and a second side thereof.
  • printing by either or both a first and a second thermal print head 50 and 60 may be manually and/or automatically enabled.
  • non-thermal media may be indicated upon indication of non-thermal media by both the first and the second sensors 100 and 102.
  • printing by both a first and a second thermal print head 50 and 60 may be manually and/or automatically disabled, and/or an operator notification, such as one or more audible, visual and/or tactile alarms indicating non-thermal media is installed, may be provided.
  • enablement and/or disablement of one or more print functions may be automatically provided for in response to one or more signals from the one or more sensors 100 and/or 102.
  • enablement and/or disablement of one or more print functions may be provided for via manual print mode selection following operator notification. Variations of the above, including combined manual and automatic schemes (e.g ., automatic print mode selection with manual operator override), are also possible.
  • a result from a print media type determination may be compared to one or more print mode settings in advance of, for example, manually or automatically making changes to one or more printer functions.
  • Such print mode settings may be stored in one or more memories or buffers 80 of the printer 10.
  • the printer is set for single-sided printing on a first side of thermal media 20
  • no manual or automatic change to the print mode may be warranted or made where the installed media is determined to be double-sided thermal media or single-sided thermal media oriented for printing on the first side.
  • the printer is similarly set for single-sided printing on a first side of thermal media 20
  • manual and/or automatic change to the print mode may be required or made where the installed media is determined to be single-sided thermal media oriented for printing on a second side.
  • a dual-sided direct thermal imaging printer 10 may be configured to manually and/or automatically perform a print media type check operation in response to, inter alia, a variety of printer operations, conditions and/or inputs.
  • a print media check may occur on-demand (e.g ., operator selected).
  • such print media check may be periodic, occurring, inter alia, at one or more fixed times and/or intervals.
  • print media check operation may be triggered by a particular event including, inter alia, power-on of the printer 10, connection of the printer 10 to an external device such as a computer or terminal (not shown), and/or replacement of media 20.
  • a print media check may be triggered by one or more signals from one or more media sensors associated with the printer 10.
  • media sensors may include one or more of a media installed sensor, and a media quantity sensor, as well as one or more media type sensors.
  • a media-in signal following a media-out signal (e.g., media replenished) may trigger execution of a print media check.
  • a print media check may be performed as one of an array of pre-operational printer diagnostics.
  • initiation of a print media check may occur in response to a single trigger or command, or a print media check may occur as a result of multiple triggers or commands.
  • initiation of a print media check may require additional signals be provided, and/or permissives be met, as a condition precedent to execution of a print media check.
  • additional signals or permissives may include a printer closed signal provided by, infer alia, one or more contact or limit switches ( see, e.g., limit switch 420 in FIG. 6 ), a print media check data storage permissive indicating a block of print data for performing a media check is stored in a memory of buffer 80 of the printer 10, and the like.
  • a printer 10 may be configured to not perform a print media check where a media sensor indicates no media is installed and/or media is improperly installed in the printer.
  • Figure 1E illustrates one embodiment of a method 600 of performing a print media check by a dual-sided imaging thermal printer 10.
  • a command or other trigger to initiate a print media check is received and/or processed by the printer 10.
  • one or more permissives are checked to verify one or more conditions precedent to performing the media check are met.
  • Such permissives may include, inter alia, a signal from a paper sensor (e.g ., paper sensor 360 in Figure 5 ) indicating there is media 20 in the printer 10, a signal from one or more limit switches 420 indicating the printer 10 is properly assembled for printing (e.g., a pivotable support arm or cover 300 in Figure 6 is properly closed and/or mated to a lower arm or base of a printer 200), a signal indicating a print transaction has been completed, a signal indicating a proper print test message is in a memory or buffer 80, and/or one or more signals indicating motor, voltage, and thermal print head 50 and 60 status are suitable ( e.g ., there are no fault conditions) for printing.
  • a paper sensor e.g ., paper sensor 360 in Figure 5
  • a signal from one or more limit switches 420 indicating the printer 10 is properly assembled for printing
  • a signal indicating a print transaction has been completed
  • a signal indicating a proper print test message is in a memory or buffer
  • print media check data is obtained (e.g ., received and/or retrieved) for attempted printing by the first and/or the second thermal print heads 50 and 60.
  • Such print media check data may comprise text (e.g ., ASCII, Kanji and the like) and/or graphics, and include one or more messages ( e.g ., messages 708 and 728 in Figures 2A and 2B ), one or more images ( e.g ., images 706 and 726 in Figures 2A and 2B ), one or more logos ( e.g ., logo 766 in Figure 2D ), and the like.
  • print media check data comprises one or more bar codes or other machine readable symbologies (e.g ., bar codes 710, 746 and 748 in Figures 2A, 2B and 2C ). Further, print media check data may be received from a computer or terminal in communication with the printer 10, or retrieved from one or more memories or buffers 80 associated with the printer 10. In one embodiment, the print media check data is retrieved from an EEPROM associated with the printer 10.
  • an attempt is made in step 640 to image one or both sides of the media 20 with the print media check data.
  • such attempt may comprise attempting to image a respective side 704 and 722 of media 700 and 720 with a bar code 710.
  • such attempt to image may comprise attempting to image a first side 742 of media 740 with a first bar code 746, and a second side 744 of the media 740 with a second bar code 748.
  • such attempt to image may comprise attempting to image a first and a second side 762 and 764 of print media 760 with the same print media check data, shown here as an image in the form of a logo 766. Attempts and/or actual printing of print media check data in the form of other symbols, images, text, messages, and the like, on either or both media sides are, of course, possible.
  • one or more signals are obtained from one or both of the sensors 100 and 102 in an attempt to obtain sensor data indicative of success or failure to print the expected print media check data on one or both sides of the media 20.
  • Such one or more sensor signals may be obtained concurrently with the attempt to print, or after the attempt to print is complete.
  • sensor signals may be obtained after a delay related to, for example, movement of the media from a respective print head 50 and 60 to a location of a respective sensor 100 and 102. Any such delay obtaining the one or more sensor signals may be factored into, and used as part of the media identification and/or validation process performed by the print media check routine.
  • any such obtained sensor signals may undergo a conversion or other transformation including, inter alia, an analog-to-digital conversion and/or a Fast Fourier Transformation (FFT).
  • FFT Fast Fourier Transformation
  • step 660 data from the raw and/or converted sensor signals is compared with sensor signal data expected to be obtained from successful printing of the print media check data.
  • the print media check data such expected sensor data may be received from a computer or terminal in communication with the printer 10, or retrieved from one or more memories or buffers 80 associated with the printer 10.
  • the expected sensor data is retrieved from an EEPROM associated with the printer 10.
  • Comparison of the obtained sensor data to the expected sensor data may comprise comparing, inter alia, one or more voltages, currents, and/or bitmaps associated with a sensor 100 and/or 102 to one or more expected voltages, currents, and/or bitmaps associated with the expected signal data. Further, such comparison may comprise determining if data from the one or more sensor signals, with or without additional processing, matches the expected sensor data to within a predefined tolerance (e.g ., +/- a predefined voltage, a predefined current level, and/or a predefined number of bits in a bitmap). It should be noted that binary ( e.g ., 1/0, or sensed / not sensed) signals and comparisons are, however, also possible.
  • a predefined tolerance e.g ., +/- a predefined voltage, a predefined current level, and/or a predefined number of bits in a bitmap.
  • step 670 depending on whether a match is found between the data indicative of the one or more signals from the one or more sensors 100 and 102 and the expected signal data, an indication of a positive (successful) or negative (failed) test may be provided.
  • such indication may comprise a positive test image 726 and/or a positive test message 728, or a negative test image 706 and/or a negative test message 708 being printed on one or both sides of the respective media 700 and 720.
  • such indication may comprise presence or absence of one or more messages or images associated with the print media check data on one or both sides of the print media such as the presence of a bar code 710 an a side 722 of the media 720 in Figure 2B and/or the absence of a bar code 710, 746, or 748 on a respective side 704, 742 and 744 of media 700 and 740 in Figures 2A and 2C .
  • Providing an indication of a print attempt success or failure may also comprise generating an audible, visual, or other (e.g ., tactile) notification indicating success or failure of a print media check. Additionally or alternatively, such indication may comprise generating one or more signals indicative of success or failure of a print attempt, and/or a type and/or orientation of media installed in the printer 10 (e.g ., double-sided thermal media, single-sided thermal media oriented for printing on a first side, single-sided thermal media oriented for printing on a second side, or non-thermal media).
  • media installed in the printer 10 e.g ., double-sided thermal media, single-sided thermal media oriented for printing on a first side, single-sided thermal media oriented for printing on a second side, or non-thermal media.
  • such generated indication and/or signal may be used to prompt manual and/or automatic enablement and/or disablement of one or more functions of the printer 10.
  • a signal or other indication of single-sided or non-thermal media being installed in the printer 10 may be used to prompt or require an operator to install double-sided media in advance of further printer use. Additionally or alternatively, such signal or indication may be used to prompt or require an operator to select a print mode commensurate with the installed media type.
  • a signal indicating success or failure to print selected print media check data on one or both sides of print media may be used to automatically set a print mode commensurate with the installed media type.
  • Such automatic print mode selection may comprise, inter alia, enabling or disabling printing by a first thermal print head, enabling or disabling printing by a second thermal print head, or enabling or disabling printing by both a first and a second thermal print head.
  • all printer 10 functionality may be disabled, and a user may be prompted to replace the installed media with single- and/or double-sided thermal media before printing may resume.
  • location on installed media of print media check data including an attempted print thereof (e.g ., location of an attempted print of bar code 710 on a side 704 of media 700 in Figure 2A ), a printed indication of print success or failure, such as a printed indication of an installed media type (e.g ., location of a positive test message 728 on a side 724 of media 720 in Figure 2B ), and the like, as illustrated in Figures 2A through 2D , may vary depending on computer system and/or printer 10 software, firmware, hardware and/or operation including thermal print head 50 and 60 spacing along a media feed path, direction of printing and the like, and media size, configuration and/or type, including whether the media contains preprinted information.
  • presence or absence of expected print media check data on one or both sides of media may provide indication of the installation of a proper media type to a user of the printer 10 and prompting, where necessary, further user intervention.
  • a print media check may occur absent any installation or use of one or more media type sensors 100 and 102.
  • baseline signals from the one or more sensors 100 and 102 for blank ( e.g ., non-thermally imaged) media may be ascertained by sensing the blank media prior to an attempt to image. Such baseline signals may then be utilized in a comparison between signal data obtained from the one or more sensors 100 and 102 after an image attempt and the expected signal data ( e.g ., as in step 660 of Figure 1 E) . In one such embodiment, one or more differences in a signal obtained after a thermal print attempt and a baseline signal obtained before the thermal print attempt may be compared to one or more aspects of an expected signal in determining whether thermal printing is successful. In an alternate embodiment, expected baseline signal data for one or more user selectable media types may also be used in identifying an installed media type.
  • print media check data may comprise any combination of text, graphics, and/or other machine readable and/or user discernable information. Additionally, the same or different print media check data may be selected for printing on one or both sides of print media. Likewise, in some embodiments, a print media check may be performed on one, two, or no ( e.g ., print media checking is disabled) sides of the media 20.
  • results from a print media check may be saved in one or more memory or buffer locations 80 associated with the printer 10 and/or sent to attached computer or terminal.
  • a fault log may be established to track success and/or failure of a print media check, and/or log a number of times an installed media type matches a set printer configuration (e.g ., single-sided paper for single-sided printing, double-sided paper for double-sided printing), and the like.
  • a print media check may also determine if the installed media is compatible with pre-selected print mode. Such compatibility may then be used on determining whether to enable and/or disable one or more printer functions, such as printing by a first and/or a second thermal print head.
  • one or more media sensors may be installed on both sides (e.g., upstream and downstream) of a respective thermal print head 50 and 60 to permit sensing irrespective of print direction (e.g ., in both a forward and/or backward media feed direction).
  • a single sensor may be used to sense thermal printing on both a first (e.g., front) and a second (e.g., back) media side.
  • a first e.g., front
  • a second e.g., back
  • Such a design may be particularly useful where a contrast of thermal printing is high in comparison to a background of blank print media, and/or print media is at least partially transparent at one or more sensing wavelengths.
  • Figure 3A shows a two-sided thermal document in the form of a receipt 110 having transaction detail 120 such as issuer identification, time, date, line item entries and a transaction total printed on a first (front) side of the receipt 110.
  • Figure 3B shows custom information 130 printed on a second (back) side of the receipt 110 contemporaneous with the transaction detail information 120 printed on the front.
  • the custom information 130 could include further or duplicate transaction information, a coupon (as shown), rebate or contest information, serialized cartoons, conditions of sale, document images, advertisements, security features, ticket information, legal information such as disclaimers, warranties and the like, or other information.
  • the custom information 130 may be targeted based on recipient / purchaser identity, transaction data, transaction detail 120, store inventory or specials, manufacturer inventory or specials, and the like, or randomly selected from a database of possible options, among other means.
  • Figure 3C shows a two-sided receipt 150 with a portion of the associated transaction detail printed on the front side 160 of the receipt 150.
  • Figure 3D shows the reverse side 170 of the receipt 150 shown in Figure 3C , where the remaining portion of the associated transaction data is shown printed on the reverse side 170 of the receipt 150.
  • Indicia such as "Front Side,” “Reverse Side,” “Side 1,” “Side 2,” or the like may be included on the two sides 160 and 170 of the receipt 150 (as shown) to denote the two-sided nature of the receipt 150 or the respective side 160 and 170 of the receipt 150 being viewed.
  • Identifying indicia such as a receipt or transaction number, terminal number, store identifier, date, time or the like may also be printed on both sides 160 and 170 of the receipt 150 to enable ready identification of the receipt 150 from either side 160 and 170 and/or of copied images of the two sides 160 and 170.
  • Figure 4 shows a perspective view of an exemplary dual-sided direct thermal receipt printer 200 for point-of-sale (POS) terminal application.
  • POS point-of-sale
  • Figure 5 schematically shows a partial centerline elevation view of the dual-sided direct thermal receipt printer 200 of Figure 4 , in a closed (operating) position.
  • the printer 200 includes a print head 210, a platen 220 and a guide roller 230 all coupled to a supporting arm or base structure 240.
  • the print head 210, platen 220 and guide roller 230 are on one side of the feed path 250 of the dual-sided thermal print media taken off a supply roll 260.
  • the printer 200 also includes a print head 270, a platen 280 and a guide roller 290 all coupled to a pivotable supporting arm or cover 300, which pivots about a hinge line 310 to allow, for example, paper replacement and servicing.
  • the media paper When the arm 300 is in the closed position (as shown), the media paper may be engaged between the print head 210 and opposed platen 280, between the print head 270 and the opposed platen 220, and between the guide rollers 230 and 290. Contact pressures with, and tension of, the print media are maintained by, for example, spring loading of the various printer elements using springs 320, 330 and 340.
  • a printer 200 may further include a spring 350 for the pivotable supporting arm or cover 300 to enable opening of the cover 300 at a controlled rate, and thereby avoid, for example, uncontrolled closing of the cover 300 through force exerted on the cover 300 via the acceleration of gravity.
  • a sensor 360 may further be provided to detects a paper out condition, and produce a signal which can be used to disable printing, notify a POS operator (not shown) to replace the supply roll 260, and the like.
  • a sensor 360 may also be provided to identify regions of the media for printing, including identifying regions comprising sense marks or other preprinted material.
  • a printer 200 may also include an electronically activated mechanical cutting or knife blade mechanism 370 to sever the print media upon completion of a print task such as printing of a transaction receipt.
  • a serrated edge 380 may also be included to enable manual severing of the print media at the end of a transaction, when a media print roll is replaced or reloaded, and the like.
  • a printer 200 may also comprise control electronics for controlling operation of the printer 200.
  • the control electronics may include a motherboard 390, a microprocessor or CPU 90, and memory 80, including one or more DRAM and/or NVRAM print buffer memory elements.
  • the printer 200 further may comprise a communications controller 396 for communicating with one or more host or auxiliary systems such as a POS terminal (not shown) for input of data to, and output of data from, the printer 200.
  • Communication controller 396 may support USB, Ethernet and/or wireless communications (e.g., 802.11, 802.15, and IR), among others. Data for printing would typically be supplied by a host POS terminal (not shown) communicating with the printer 200 via the communication controller 396.
  • Supplemental data for printing can also be supplied by, for example, a network server (not shown) providing data directly to the printer 200 using the communication controller 396, or indirectly through the host POS terminal.
  • the supplemental data for printing may vary depending upon the goods or services sold, an in-store, chain-wide or manufacturer special, identification of the customer, and/or one or more other transaction aspects.
  • the memory 80 of the dual-sided direct thermal printer 200 may have a predefined print data storage area to store one or more blocks of predefined print data to be repetitively printed on one or both sides of the print media.
  • the blocks of predefined print data may comprise, for example, a store identifier, a logo, a coupon, an advertisement, and the like.
  • the predefined print data may be printed along with data submitted by application software associated with the POS terminal (not shown) on the same or an opposite media side. Where multiple data blocks are stored in the predefined print data storage area, the blocks may be alternatively selected for printing through use of the hardware or software switch 70, as may be the location on or side of the media they are printed, and the like.
  • a dual-sided direct thermal printer 200 as described may be operated with legacy or other application program software developed for use with, for example, a single-sided direct thermal printer.
  • the dual-sided logical or mechanical printing function switch 70 may be used to enable dual-sided thermal media printing using input from the single-sided application program software.
  • the switch 70 may enable activation and deactivation of one or more dual-sided printing functions in response to a manual setting, or to a command message or escape sequence transmitted to the printer 200 via the communication controller 396, or a configuration setting though a driver or utility interface as previously described.
  • the single-sided application software conventionally controls printing of submitted data on one media side, while the switch 70 enables printing of, for example, additional information on the opposite media side. This functioning would allow realization of dual-sided direct thermal printer benefits with legacy software, before or without having to invest in custom printing mode applications or other new application program or interface software.
  • a one-sided printing application program may thus control direct thermal printing on one side of a media sheet, where the dual-sided printing function switch 70 is configured to enable thermal printing on the other media side.
  • the data printed under control of the function switch 70 may be a block of data stored in the memory 80 of the printer 200 for repetitive printing as previously described.
  • the block of data to be printed may, for example, be selected by a command or an escape message, as a function of data received from the one-sided printing application program such as transaction detail data, or it may be randomly selected, as previously described.
  • the dual-sided direct thermal printer 200 may be operated to print data provided by legacy or other application program software on both sides of a media sheet.
  • the dual-sided logical or mechanical printing function switch 70 is used to enable a further mode of operation of the dual-sided thermal printer 200 to divide and apportion data received from the single-sided application program software among the two media sides.
  • Such a split can be even, e.g., half of the data is printed on each side of the media, or can be otherwise apportioned to maximize use of the media in light of any preprinted material on or supplemental information to be printed with the single-sided application program provided data, and the like.
  • the dual-sided thermal printer 200 may be designed to accommodate the ability to print on the front and back, or either side independently, of a thermal media.
  • Figure 6 schematically shows an example partial drive or gear plane elevation view of the dual-sided direct thermal receipt printer 200 of Figures 4 and 5 , with the cover 300 in a closed position.
  • the platens 220 and 280 are coupled at their ends for rotation by a first gear 400 and a second gear 410, respectively.
  • the first gear 400 is in operative contact with the second gear 410, as well as a third gear 415.
  • the third gear 415 is coupled to a motor 416 for driving the first and second gears 400 and 410, and their respective platens 220 and 280.
  • the third gear 415 drives the first and second gears, 400 and 410, and their respective platens, 220 and 280, such that the print media is directed over the respective print heads away from the print roll 260 in a forward feed direction.
  • the third gear 415 drives the first and second gears, 400 and 410, and their respective platens, 220 and 280, such that the print media is directed over the print heads toward to the print roll 260 in a backward feed or retract direction.
  • drive means e.g., belt drives, direct drives, friction drives and the like
  • the printer 200 of Figure 6 also includes one or more additional sensors, such as one or more limit switches 420, which provide signals for use in controlling operation, or signaling condition of the printer 200.
  • a signal from a first limit switch 420 can be used to notify a POS operator that the cover 300 of the printer 200 is not properly closed.
  • a signal from the first limit switch 420 can be used to allow automatic deactivation of printing until the cover 300 is in a properly closed position.
  • a signal from a second limit switch 420 can be used in combination with a signal from the first limit switch 420 to ensure the cover 300 is properly closed. This may include a determination that the cover 300 is properly aligned with respect to the base 240 such that opposing print heads (210 and 270) and platens (280 and 220) are in full and uniform contact across their width in advance of printing, and the like.
  • a signal from a further sensor may be used to indicate that a proper pressure for printing is obtained between opposing print heads and platens.
  • a further sensor may be used to indicate a proper tension is obtained on the print media, or a locking mechanism such as one or more latch 430 is properly engaged.
  • a signal from any such sensor may used to trigger notification of an improper condition to an operator (not shown), such as through the sending of an error message to a POS terminal (not shown), and/or through disabling some or all printer operations until the condition is corrected, and the like.
  • a locking mechanism such as one or more latch or detent 430, is also provided with the printer 200 to secure the pivotable supporting arm 300 in place, and maintain the proper positioning of opposing print heads (210 and 270), platens (220 and 280) and guide rollers (230 and 290), including maintaining a proper contact pressure across the width of the media, and/or tension of the media along the media feed path 250 during printer operation.
  • the latch 430 is biased by a spring 432 against a stop 434, and is released by pressing of a button 435. In addition to moving the latch 430 away from the stop 434, depression of the button 435 applies sufficient upward force on the cover 300 to separate the print heads from the platens in light of the applied contact pressure and frictional forces, and thereby allow the cover 300 to be freely opened.
  • the latch 430 in combination with the spring 350, also prevents the pivotable supporting arm 300 from striking the supporting arm or base structure 240, or other components of the printer 200 such as the print head 210, platen 220 and/or guide roller 230 if the pivotable supporting arm or cover 300 is opened and dropped.
  • Figure 7 schematically shows a partial centerline elevation view of the dual-sided direct thermal receipt printer 200 of Figure 4 with the pivotable supporting arm or cover 300 in an open position to allow, for example, insertion and replacement of two-sided printing media rolls 260, and other servicing.
  • a link 435 connects to (as shown) or is otherwise in operative contact with the cover 300 and base structure 240 to limit the open position of cover 300.
  • the link 435 may further comprise a damping element to damp motion of the cover 300 such as where the cover 300 is opened under force of the spring 350.
  • the combination of the link 435 and spring 350 comprise a mechanism for controlling the motion of the pivotable supporting arm or cover 300 for the two-sided direct thermal printer 200 to mitigate the potential for damage to printer components upon opening and closing of the cover 300.
  • a mechanism for controlling the motion of the pivotable supporting arm or cover 300 may include one or more torsional elements such as springs, and/or one or more frictional or damping elements such as shock-absorbers or bushings to control the motion of the pivotable support arm or cover 300 such as by slowing down its rate of opening.
  • Figure 8 schematically shows a partial centerline elevation view of a variation of the dual-sided direct thermal receipt printer of Figure 4 , with the cover 300 in a closed position.
  • the illustrated printer 440 includes two print heads 450 and 460, and two platens 470 and 480 on opposite sides of a print media feed path 250.
  • Print heads 450 and 460 are substantially in-line and face substantially opposed directions.
  • the feed path 250 of the print media is substantially a straight line path given the substantially in-line orientation of the print heads 450 and 460.
  • This configuration facilitates frontal exiting of the print media from a machine associated with the printer 440 such as an ATM, kiosk or other self-service terminal.
  • the in-line feed path also facilitates automation of media replacement including allowing the media to be automatically drawn from the first print head 450 and platen 470 to and through the second print head 460 and platen 480.
  • Automatic media feed and retraction may, however, also be provided for with the normal print head and platen configuration of Figure 5 , among other configurations.
  • additional print head (452 and 462) and platen (472 and 482) orientations, and resultant media feed paths (250), such that illustrated in Figures 13 and 14 are also possible.
  • Figure 9 schematically shows a partial drive or gear plane elevation view of the dual-sided direct thermal receipt printer 440 of Figure 8 .
  • first and second gears 490 and 500 are respectively coupled to first and second platens 470 and 480.
  • This configuration allows the first platen 470 and second platen 480 to be independently driven by one or more motors (not shown) operatively coupled to the first 490 and second 500 gears, respectively.
  • the first platen 470 can be independently driven so as to pull the print media away from the roll 260 and direct it toward the second platen 500.
  • the second platen 480 can be independently driven so as to pull the print media away from the roll 260 and/or first platen 490, and direct it out of the printer 440.
  • the first and/or second platens can be independently driven so as to pull the print media away from the exit back into the printer 440, and/or away from the second print head 460 and platen 480.
  • Such a dual drive media feed mechanism may be used to facilitate automatic retraction of the print media such that printing may occur on a portion of the media that would otherwise be unused owing to the offset in the spacing along the paper path of the print heads 450 and 460.
  • such a dual drive feed mechanism may be used to delay printing on one side of a print media as compared to the other side such as by allowing printing to occur on all or a portion of one side of the print media followed by a retract of the media for printing on all or a portion of the other side of the print media.
  • forward and/or backward drive (not shown) of the media such as the media roll 260 may also be provided.
  • FIG 10 schematically shows a partial centerline elevation view of a further variation of the dual-sided thermal printer 440 of Figure 8 .
  • the printer 440 is designed to support print media such as a sheet roll 260 outside of the cover 300 to facilitate ready replacement of print media and/or relatively large media roll 260 sizes.
  • the print heads 450 and 460 in the dual-sided thermal printer illustrated in Figure 10 are substantially in-line and face substantially opposed directions.
  • the feed path 250 of the print media is also substantially in-line facilitating automated replacement and loading of print media.
  • One or more media guides 505 are further provided to align the media, and thereby facilitate automated media loading and feed.
  • Figure 11 schematically shows a partial drive or gear plane elevation view of the dual-sided direct thermal receipt printer 440 of Figure 10 wherein first and second drive gears 470 and 480 are attached to respective first and second platens 490 and 500 for independently and/or collectively moving print media in a forward and/or backward direction along a media feed path 250.
  • FIG 12 schematically shows a partial centerline elevation view of a further variation of the dual-sided direct thermal receipt printer of Figure 4 .
  • This printer configuration utilizes a modular construction in which the printer 510 has a first and a second print head 520 and 530 which are part of plug-in modules 540 and 550, respectively. Likewise, the printer 510 has first and second platens 560 and 570 which are part of plug-in modules 580 and 590, respectively.
  • Such modular construction facilitates manufacture of a printer with a single print head and platen for operation in a single-sided print mode while simultaneously providing for ready, future upgrading to two-sided printer functionality in the field.
  • the modular construction allows readily replacement and/or upgrade of the various modules 540, 550, 580 and 590 for increased future functionality, or as the various print heads 520 and 530, and platens 560 and 570 wear out.
  • a modular printer 510 may have a first print head 520 and first platen 560 coupled into a single, first module, and a second print head 530 and second platen 570 coupled into a single, second module.
  • a first print head 520 and second platen 570 may be coupled into a first module
  • the second print head 530 and first platen 560 may be coupled into a second module. Additional module print head and/or platen configurations and couplings are possible.
  • any of the attachments 600 used to attach any of the various modules to the cover 300 and/or base 240 may comprise static or dynamic (e.g ., spring mounted) couplings for reducing mechanical stress on the various modules, and assisting in maintaining a desired contact pressure on the print media by the respective print heads and platens during print operations.
  • each of the cover 300 and base 240 are appropriately modified (not shown) to readily accept the respective modules and associated attachments 600.
  • the attachments 600 may comprise electrical contacts, electro-mechanical contacts, and/or mechanical contacts depending on the attachment module type (e.g ., platen, print head, and platen and print head), and the like.
  • an upper support arm or cover 300 as being pivotable with respect to a lower support arm or base 240 about a hinge pin 310
  • the upper support arm or cover 300 may also be fixably attached, or otherwise coupled to the lower support arm or base 240, and not pivotable.
  • the upper support arm or cover 300 is attached to the lower support arm or base 240 using one or more fasteners such as screws.
  • a dual-sided thermal printer such as printer 440 of Figure 10 typically has print heads 450 and 460 that are substantially in-line or in-plane.
  • a dual-sided thermal printer such as printer 200 of Figure 5 can have print heads 210 and 270 angled with respect to one another, e.g ., at an angle of about 90 degrees to, for example, permit top exit of a receipt.
  • Such angled orientation permits a reduced spacing between the print heads 210 and 270 for minimization of the length of unprinted areas or white spaces on opposite sides of the media in a once-through direct thermal printing process.
  • Appropriate angles, aspect and location of one print head with respect to another and/or their respective platens will vary based on the printer end use and needs of the specific print media and/or print environments (i.e. kiosk printer, pharmacy printer, POS printer, and the like).
  • the lateral spacing of a first and a second thermal print head may be optimized to allow heat applied to a first side of a two-sided imaging element by the first print head to sufficiently dissipate so that heat applied to a second side of the imaging element by the second print head does not cause unwanted printing on the first side.
  • the optimum spacing is a function of the amount of heat applied by the respective print heads, the imaging material and/or dyes utilized in the imaging element, properties of any coatings utilized in the imaging element including coating thickness and thermal conductivity, properties of any substrate utilized in the imaging element including substrate thickness and thermal conductivity, speed of printing, and the like.
  • a dual-sided thermal printer 200 or 400 may comprise a pair of guide rollers 230 and 290 for maintaining a proper tension of print media, and guiding the media through the printer.
  • the rollers can be respectively coupled to pivoting opposing arms that support print heads and platens.
  • a print head, a platen and a guide roller can be coupled to a supporting arm or base structure on one side of the media feed path.
  • Opposing print head, platen and guide roller elements can be coupled to a second supporting arm, e.g ., a structure that pivots with respect to the base structure, that aligns on the opposite side of the media feed path.
  • Each print head may thus be opposed by a platen and the guide rollers may oppose or be in proximate relation to one another across the media feed path.
  • Contact pressure may be maintained against the print media by one or more springs urging the print heads against the platens.
  • one or both guide rollers may be spring loaded to maintain appropriate roller contact pressure with the print media.
  • two print heads may directly oppose one another across the feed path without platens.
  • each of two supporting arms may be coupled to an associated guide roller and one of the print heads.
  • a guide roller can comprise a pair of spaced coaxially aligned guide rollers. The space between the coaxially aligned guide rollers allows the addition of a variable size paper guide to accommodate different width media; whether rolls, fan-fold, sheet or otherwise.
  • platens 220 and 280 may have a substantially round cross-section.
  • the platens 220 and 280 may have a substantially square or rectangular cross section, or otherwise present a substantially flat surface to either or both of the print heads 210 and 270.
  • each of the platens 220 and 280 may be substantially the same size and/or have substantially the same cross-sectional profile and/or area, or one platen may differ in one or more respects with regard to the other, including length.
  • one or more platens or platen surfaces may comprise one or more coatings or materials.
  • the platen and/or its surface may comprise a material providing for enhanced friction such as a rubber.
  • the platen may comprise or be coated with a material providing for decreased friction such as polytetrafluoroethylene (PTFE).
  • PTFE polytetrafluoroethylene
  • the platens have a substantially round cross-section of approximately 3/8 to 1/2 inch diameter, and are substantially the same length.
  • two thermal print heads are substantially opposite each other across a media feed path and act as respective platens for each other.
  • one or both of the thermal print heads may comprise or be coated with a friction reducing material.
  • media feed may be provide for by one or more belts, wheels, rollers, and the like.
  • drive rollers in the form of platens 220 and 280 on opposite sides of a media feed path 250 are coupled for rotation by gears.
  • either of both platens can be jointly coupled or independently driven by, inter alia, (1) one or more belts or bands, (2) two or more meshing gears, (3) one or more direct drives, and/or (4) one or more direct contact frictional elements, any or all of which may be in operative contact with, or directly driven by, one or more drive motors or actuators.
  • upstream and downstream platen drive mechanisms such as motor driven upstream and downstream platens, which are capable of individual or simultaneous operation, may be provided.
  • power is provided to drive the downstream platen
  • power is provided to drive the upstream platen.
  • the dual drive feed mechanism allows automatic retraction of an imaging element such that printing may occur on a portion of the element that would otherwise be un-used owing to an off-set in the spacing 55 of print heads in a two-sided printer, and the like.
  • the automatic retraction feature could also be implemented by a single motor driving both platens, e.g., where the platens are commonly coupled for rotation by one or more belts, or two or more gears as shown in Figures 6 and 9 , and the like.
  • a desired uniform print head to platen contact pressure across the width of a two-sided imaging element can be provided during printer operation.
  • the mechanism for this may include one or more springs on or associated with the print heads, platens and/or common supports therefore, e.g ., springs 320, 330 and/or 350 shown in Figure 5 , spring loaded attachments 600 shown in Figure 12 , and the like.
  • Control electronics such as one or more sensors 100, 360 and 420 in the form of one or more paper sensors to detect media presence and/or printing thereon, and contact switches to detect proper mechanical arrangement and alignment of print elements for printing, and the like, can be used to permit (e.g., as permissives) and control operation of a dual sided thermal printer and/or dual sided thermal printer functionality.
  • one or more contact sensors may be provided to allow printer operation only when the first and second print heads are properly positioned with regard to the first and second platens, a proper contact pressure is achieved between the first and second print heads and their respective platens, and/or a supporting pivotable arm structure or cover 300 is properly secured, etc.
  • one or more optical sensors may be provided to detect presence of and printing on print media for enabling and controlling location of thermal printing on the media.
  • a mechanism may be provided for individually retracting one or both print heads and/or platens in a two-sided printer to allow the printer to function in a single-sided print mode while minimizing wear on the unused print head or platen.
  • the retracting mechanism may be manually or automatically, e.g ., electronically or electromechanically, actuated.
  • This print mode supports basic single-sided printing, allowing operation of thermal print heads on one side of a media feed path.
  • Double-sided with single-side command mode (e.g ., buffered print mode). This print mode will allow for the storage of some or all of the print data by the printer in advance of imaging the media.
  • Print data received from, for example, a POS terminal (not shown) is stored in a print buffer 80 until an end-of-transaction message such as a knife (cut) command is received.
  • the firmware will then divide the buffered print data and designate a first portion, such as a first half of the data, for printing on the first ( e.g ., front) side of the media, and a second portion of the data, such as the remaining half, for printing on the second ( e.g ., back) side of the media.
  • the double-sided buffered print mode may be enabled by manually setting of one or more DIP or other switches or jumpers, through use of a diagnostic set up routine, by sending an escape code or command, e.g ., the 1 F 11 xx command, to the printer, and the like.
  • Double-sided with double-side command mode (e.g ., application controlled print mode).
  • This print mode allows for control of double-sided print functionality by an application program such as transaction software running on a POS terminal.
  • Such application may control printing through controlling the location of print data on a first ( e.g ., front) and a second ( e.g ., back) side of media such as a receipt, when and in what sequence the application data is to be printed, and the like.
  • the double-side command mode may store application print data in one or more buffer or other memory locations prior to printing. Likewise it may select predefined data from one or more buffer or other memory locations to print at one or more locations of one or both sides of the media with or without application print data.
  • the double-sided command mode may be initiated through receipt of one or more double-sided print commands, a diagnostic routine, through manual setting of switches or jumpers, and the like.
  • Double-sided print mode with predefined data When operated in this mode, predefined data from one or more of predefined print data storage facilities (e.g ., buffer or other memory locations) may be printed on one side of a two-sided thermal media, and application data, such as POS terminal transaction information, may be printed on another side separate from the predefined data print side.
  • the printer When this mode is selected, the printer may initiate printing on both sides of the media, or store the application print data in the data storage facility 80 until a command for initiating double-sided printing is received.
  • the double-sided print mode with predefined data may be initiated through receipt of one or more associated commands, through use of a diagnostic routine, through manual setting of switches or jumpers, and the like.
  • a dual-sided thermal printer 200 preferably has the following capabilities:
  • Print Speed 4.0 inches per second (IPS) when 55 watt power is provided. This includes front and back printing.
  • Print Speed 6.7 IPS when 75 watt power is provided. This includes front and back printing.
  • Print Buffer Up to 450 print lines at 7.5 lines per inch (LPI) assuming 44 characters/line Logo/Text Storage.
  • the character attributes be the same for the front and the back side of the receipt. For example if double high printing is printed on the front side then the printing on the back side would also be double high. Alternate front/back characters sizes and/or fonts are, however, possible.
  • the printer can distribute the buffered data for printing on each side of the media, and then print the remaining data on one side, e.g., the front side of a receipt, prior to performing a knife cut. Alternately, the printer can distribute and print the buffered among the two sides then refill the print buffer 80 with additional print data, and continue this process until an end-of-transaction message such as a knife cut command, is received.
  • Exemplary Printer Setting Change Commands m (Hex) Function n (Hex) Function 60 Thermal Printing Mode 00 Single-Sided Mode 01 Double-Sided Mode with Single-Side command 02 Double-Sided Mode with Double-Side Command 03 Double-Sided Mode with Predefined Data 61 Upside Down Printing for Double-Side 00 Front: Normal, Back: Normal Front: 01 Upside down, Back Normal Front: 02 Normal, Back: Upside Down Front: Upside Down, Back Upside Down 03 62 Swap Front Side and Back Side 00 Not Swap Front side and Back sides 01 63 Predefined Bottom/Top Message 00 No Message Bottom Message on Front 01 Top Message on Back Both Bottom 02 Message on Front and Top Message 03 on Back 64 Minimum Receipt Length 00 No Minimum Receipt Length in inches 01-FF for Minimum receipt length 65 Reprint when Error Occurs 00 Resume printing from last error line 01 Reprint the error page
  • print data is buffered and split in two parts.
  • the first part of the print buffer will be printed on a first (e.g ., front) side and the second part of the print buffer will be printed on a second ( e.g ., back) side of the media such as receipt paper.
  • the printing of the data may be executed by, for example, sending a knife or other end of transaction command to the printer (Exception: The command Select Thermal Printing Side and Start Double-Sided Printing would be ignored).
  • print data is selectively buffered and printed on the front and back side of media such as receipt paper upon command from an application program, such as software executed by a POS terminal.
  • an application program such as software executed by a POS terminal.
  • print data may include predefined print data stored in one or more buffer or other memory locations of the printer.
  • Application program data such as POS terminal transaction data
  • predefined data such as one or more of an advertisement, incentive, coupon, rebate or other information
  • data printed on a given media side may be switched such that, for example, transaction data is printed on a front side and predefined data is printed on a back side, and vice versa.
  • a given predefined data block may be printed only once for a given document such as a receipt. Document length is determined by the print data ( e.g ., transaction versus predefined) requiring the greater amount space.
  • the Printer Setting Change command (e.g ., 1 FH 11H) is used to store the setting.
  • Character attributes are same for both sides. For example, when the front side printing characteristic is Double wide, the back side printing characteristic is also Double wide. When either side of printing area is lager than printing buffer (TBD: XX inch), printer will start printing automatically then printer return to single-sided printing.
  • TBD printing buffer
  • Printing side (Front/Back side) is physical side of printing.
  • This command makes the first line becomes the last line, and the first character of first line becomes the last character of last line.
  • This command is valid in Double-Side Mode. Before starting double-side printing, only the last received select or cancel upside down printing command is effective. The setting of this command is not stored into NVRAM/Flash memory.
  • the Printer Setting Change command (e.g ., 1 FH 11 H) is used to store setting.
  • This command will swap the printing of the front side data and backside data when the printer is in Double-Side Mode.
  • the Front Side data is printed via Front Side thermal head.
  • the Front Side data is printed via Backside thermal head.
  • the Printer Setting Change command (e.g ., 1 FH 11H) is used to store setting.
  • n 0,1,2,3.
  • This command will download one line of text into ROM.
  • the message is used in all Double-Side Modes.
  • User can select to automatically add a 1-line/2-line text message at bottom of Front Side or/and at top of Back Side.
  • Front Side uses line 0 and line1 and Back Side uses line 2 and line 3.
  • Printing side (Front/Back side) is logical side of printing.
  • Bit 1 0: Disable predefined top message on back side
  • printer When this function is enabled, printer will automatically add a 1-line or 2-line text message at the bottom/top of front side/backside of receipt.
  • This command is only valid in Double-Side Mode (All w/Single-Side Command and w/Double-Side Command and w/Predefined data). The setting of this command is not stored into NVRAM/Flash memory.
  • the Printer Setting Change command (e.g ., 1 FH 11H) is used to store setting.
  • the Macro size is 2048 bytes each.
  • Predefined back side printing definition begins when this command is received during normal operation and ends when this command is received during Predefined back side printing definition. If the printer receives a second "Start or End Predefined Back Side Printing" immediately after previously receiving a "Start or End Predefined Back Side Printing" the printer will clear Predefined Back Side Printing. If this command is received during a Macro's definition (GS :), the current Macro definition will be cleared. During definition of predefined backside printing, receive command GS: (Start or End Macro Definition) will make the current definition be cleared.
  • n1 0
  • n2 0
  • This command defines the minimum media (e.g ., receipt) length to start the conversion from single-side to double-side printing. This setting is enabled for only "Double-Sided Mode with Single-Side Command".
  • the Print Media Check Mode can be enabled or disabled in printer diagnostics.
  • the setting (value) is saved into EEPROM.
  • the Select Thermal Printing Mode Command e.g ., 1F 60 n
  • the Select Thermal Printing Mode Command setting e.g ., Single-Sided Mode, Double-Sided Mode with Single-Side Command, Double-Sided Mode with Double-Side Command, and Double-Sided Mode with Predefined Data.
  • the Print Media Check Mode Command is set to Media Checking Enabled
  • the Exemplary Select Thermal Printing Mode Command is set to Double-Sided Mode with Single-Side Command.
  • the media Upon execution of the check, if the media is determined to be double-sided thermal, operation will continue in the selected Double-Sided Mode with Single-Side Command. However, if the media is determined to be single-sided thermal, operation will proceed pursuant to the Single-Sided Mode, thereby ignoring ( e.g ., overriding) the Select Thermal Printing Mode Command ( e.g ., 1F 60 n ) setting.
  • Paper Match Status Print Mode Table Selected Thermal Print Mode Detected Media Paper Matching Status(1) Operating Print Mode Error Message Print(2) 1 F 60 n Command Status Single-Sided Mode Single-Side 01 Single-Sided Mode No print Ignore Double-Side 01 Single-Sided Mode No print Valid Double-Sided Mode Single-Side 10 Single-Sided Mode Print Ignore with Single-Side Command Double-Side 01 Double-Sided Mode with Single-Side Command No print Valid Double-Sided Mode with Double-Side Command Single-Side 10 Double-Sided Mode with Double-Side Command Print Valid Double-Side 01 Double-Sided Mode with Double-Side Command No print Valid Double-Sided Mode with Predefined Data Single-Side 10 Double-Sided Mode with Predefined Data Print Valid Double-Side 01 Double-Sided Mode with Predefined Data No print Valid (1) e.g ., Bit 4 & 5 of 1 F 6C and 1F 6D Commands (2)
  • an error message may be printed on the thermal side of the single-sided media indicating to a user that two-sided thermal paper is not loaded.
  • Other methods of user notification including one or more visible, audible, and/or tactile alarms, are also possible.
  • the returned thermal printing mode status has the following bit designations: Thermal Printing Mode Status Bit Designation Table Bit Off /On Hex Decimal Function 1,0 - 00 0 Single-Sided Mode Selected - 01 1 Double-Sided Mode with Single-Side Command Selected - 10 2 Double-Sided Mode with Double-Side Command Selected - 11 3 Double-Sided Mode with Predefined Data Selected 2 - 0 0 Not defined. Fixed at 0.
  • bits 4 and 5 of the Return Thermal Printing Mode Batch Command and the Return Thermal Printing Mode Real Time Command will have the following designations: Thermal Print Mode Status Bit 4 and 5 Designations Selected Thermal Print Mode Detected Media Bit 4 & 5 Status Single-Sided Mode Single-Side 01 Double-Side 01 Double-Sided Mode with Single-Side Command Single-Side 10 Double-Side 01 Double-Sided Mode with Single-Side 10 Double-Side Command Double-side 01 Double-Sided Mode with Single-Side 10 Predefined Data Double-Side 01
  • Character attributes are same for both sides. For example, when the front side printing characteristic is Double wide, the back side printing characteristic is also Double wide. When either side of printing area is larger than printing buffer, printer will start printing automatically then printer return to single-sided printing.
  • first and a second print head, platen, gear, and the like may vary among embodiments.

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  • Printers Characterized By Their Purpose (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)

Claims (15)

  1. Imprimante thermique directe double-face, comprenant :
    une première tête d'impression thermique d'un premier côté d'un trajet d'alimentation en supports ;
    une seconde tête d'impression thermique d'un second côté du trajet d'alimentation en supports ;
    caractérisée par
    un ou plusieurs capteurs de type de support, conçus pour détecter si un support dans l'imprimante est un support thermique ou est un support non-thermique.
  2. Imprimante thermique directe double-face suivant la revendication 1, comprenant, en outre :
    une première platine ;
    une seconde platine ;
    un premier bras ; et
    un second bras,
    dans laquelle la première tête d'impression thermique et la première platine sont adjointes au premier bras et la seconde tête d'impression thermique et la seconde platine sont adjointes au second bras.
  3. Imprimante thermique directe double-face suivant la revendication 1 ou 2, comprenant, en outre :
    un pivot ;
    dans laquelle le premier bras peut pivoter autour du pivot par rapport au second bras.
  4. Imprimante thermique directe double-face suivant l'une quelconque des revendications 1 à 3, dans laquelle au moins l'un des un ou plusieurs capteurs du type de support comprend un capteur d'impression thermique, conçu pour produire un signal indicateur d'une impression thermique sur une face ou sur les deux faces du support.
  5. Imprimante thermique directe double-face suivant la revendication 4, dans laquelle le capteur d'impression thermique comprend un capteur optique.
  6. Imprimante thermique directe double-face suivant l'une quelconque des revendications précédentes, comprenant, en outre, une première mémoire conçue pour mémoriser un ou plusieurs blocs de données d'impression de contrôle du type de support.
  7. Imprimante thermique directe double-face suivant la revendication 6, comprenant, en outre, une unité de commande, conçue pour faire débuter une tentative d'impression d'au moins l'un des un ou plusieurs blocs de données d'impression de contrôle du type de support par au moins l'une des première et seconde tête d'impression thermique.
  8. Imprimante thermique directe double-face suivant l'une quelconque des revendications précédentes, comprenant, en outre, une seconde mémoire conçue pour mémoriser un ou plusieurs blocs de signal de capteur escomptés.
  9. Imprimante thermique directe double-face suivant la revendication 8, dans laquelle l'unité de commande est conçue, en outre, pour comparer un signal du capteur d'impression thermique à au moins l'un des un ou plusieurs blocs de signal de capteur escomptés en réaction à une tentative d'impression des au moins un ou plusieurs blocs de données d'impression de contrôle du type de support par au moins l'une de la première et de la seconde têtes d'impression thermique.
  10. Imprimante thermique directe double-face suivant la revendication 9, dans laquelle l'unité de commande est conçue, en outre, pour fournir une indication d'un type de support dans l'imprimante en réaction à la comparaison.
  11. Imprimante thermique directe double-face suivant l'une quelconque des revendications précédentes, dans laquelle le type de support comprend l'un de supports thermiques simple-face, de supports thermiques double-face et de supports non-thermiques.
  12. Imprimante thermique directe double-face suivant la revendication 9, dans laquelle l'unité de commande est conçue, en outre, pour invalider une ou plusieurs fonctions de l'imprimante thermique directe double-face en réaction à la comparaison.
  13. Imprimante thermique directe double-face suivant la revendication 9, dans laquelle l'unité de commande est conçue, en outre, pour valider une ou plusieurs fonctions de l'imprimante thermique directe double-face en réaction à la comparaison.
  14. Imprimante thermique directe double-face suivant la revendication 9, dans laquelle l'unité de commande est conçue, en outre, pour fixer un mode d'impression en réaction à la comparaison.
  15. Procédé pour faire fonctionner une imprimante thermique directe double-face, procédé dans lequel :
    on tente de former une image thermique sur l'une ou sur les deux faces d'un support installé ;
    on obtient un signal d'un ou de plusieurs capteurs d'impression thermique ;
    on compare le signal de capteur d'impression thermique obtenu à un signal de capteur escompté ; et
    on fournit une indication sur la base de la comparaison sur le point de savoir si le support est un support thermique ou un support non-thermique.
EP07748859A 2006-12-22 2007-01-08 Détection d'impression thermique double face Active EP2097266B1 (fr)

Applications Claiming Priority (2)

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US11/644,262 US8670009B2 (en) 2006-03-07 2006-12-22 Two-sided thermal print sensing
PCT/US2007/000475 WO2008079153A1 (fr) 2006-12-22 2007-01-08 Détection d'impression thermique double face

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EP2097266A4 EP2097266A4 (fr) 2011-06-22
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JP (1) JP5033884B2 (fr)
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CN101663169B (zh) 2013-06-19
EP2097266A1 (fr) 2009-09-09
WO2008079153A1 (fr) 2008-07-03
JP2010513088A (ja) 2010-04-30
JP5033884B2 (ja) 2012-09-26
CN101663169A (zh) 2010-03-03
EP2097266A4 (fr) 2011-06-22
BRPI0706200A2 (pt) 2011-03-22

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