Abstract: A print head transport mechanism of a postage meter for printing postal indicia which are of greater height than a printing height of a print head comprises a carriage to traverse the print head in a first direction over a band of a print receiving area and a guide to displace the print head from a home position to an index position during a second traverse of the print head in a reverse direction whereby the print head traverses over a second band, adjacent the first band, of the print receiving area during the second traverse.

Abstract: An ink jet print head includes an ink jet print module contained in a cartridge housing. The ink jet print module includes a surface containing a plurality of ink jet nozzles and this surface extends in a aperture of the cartridge housing. An element extends from the housing and supports a set of electrical terminals and electrical connection means provide electrical interconnections between electrical contacts of the set of electrical contacts of the ink jet print module and electrical terminals of the set of electrical terminals supported in the element.

Abstract: A method of controlling operation of a print head to align imprints printed by the print head in two traverses in opposite directions is disclosed. The print head includes a row of printing elements that are operated selectively in a plurality of print cycles to print each imprint. Upon completion of printing a first imprint, signals corresponding to motion of the print head step the count of a counter. The stepping of the counter is terminated when the print head passes a reference position. During a reverse traverse of the print head, stepping of the counter is initiated when the print passes the reference position and operation of the print head to print a second imprint is initiated when the count reaches a predetermined count.

Abstract: Postage metering apparatus is provided with a removably mounted print head module such as an inkjet cartridge with an integral ink supply. The module includes means responsive to the number of printing operations performed by the print head and to terminate operation of the print head when a predetermined number of operations have been performed. Upon termination of operation of the print head, a signal is sent to a microprocessor of the postage meter which then transmits information relating to use of the print head, and if desired postal register information, to a remote data centre. The remote data centre may then send an authorization signal permitting further operation of the print head.

Abstract: A construction of ink dispensing roller is described in which a porous ink metering layer extends around a peripheral surface of a porous ink reservoir. To prevent relative movement between the ink metering layer and the ink reservoir, the ink metering layer is securely located relative to the ink reservoir by means of elements of the ink metering layer extending beyond each axial end of the ink reservoir and being clamped between end cheeks and the axial end walls of the ink reservoir. The ink metering layer is manufactured from sheet material joined by welding along opposite edges into a tubular form. After welding the tubular form is manipulated so that an inner surface becomes a radially exterior ink dispensing surface.

Abstract: A method for printing on a smart card using the printer of a postage meter is disclosed. The postage meter has a feed mechanism for feeding mail items past a print head and the construction of the feed mechanism is such that the spacing of adjacent feed rollers is greater than the length of the smart card. As a result the feed mechanism is incapable of feeding smart cards. Therefore in the method a carrier is provided for the smart card, the carrier being of sufficient length as to be engaged by the feed rollers during feeding thereof. Preferably the carrier comprises a sheet having a recess therein to receive the smart card so that the print receiving surface of the smart card is approximately co-planar with the surface of the carrier sheet.

Abstract: Methods and apparatus for authentication of postage indicia are disclosed. A secret key is read from store and modified in dependence upon postage data to be printed in a postage indicium. The modified key is then utilized to generate an authentication code dependent upon the postage data to be printed. Authentication of the indicium is effected by reading the authentication code and postage data from the printed indicium and repeating the process of generating an authentication code. The generated authentication code is compared with the authentication code read from the indicium. A control code based on a value in an accounting register may be included in the indicium. The value may be a value of postage dispensed in a determined expired period.

Abstract: A mail opener comprises a cutting device, the cutting device being movable between an operating position and a retracted position where it is inoperative, the position of the cutting device being controllable by a drive means controlled by the postage meter. The arrangement is such that a single post station can be provided for both franking mail and opening mail, the post station incorporating a safety measure to prevent newly franked outgoing mail from being inadvertently opened or damaged by the mail opener.

Abstract: A construction of packaging such as an envelope is disclosed that comprises a wall surrounding contents of the packaging and electrically conductive tracks extending over the wall. An electronic control device is mounted to the wall and includes a plurality of output ports to which one end of each conductive track is connected and an input port to which an opposite end of the conductive tracks are connected. The control device outputs from the output ports pulses which are distinguished from one another and monitors the input port for receipt of these pulses to provide an indication of integrity of the wall of the package.

Abstract: A postage meter includes a printing device, for example an inkjet print head cartridge having an integral ink supply, removable from the postage meter by a user of the postage meter whereby a cartridge with a depleted ink supply can be replaced with a cartridge having a full ink supply. The printing device includes means storing a unique identification of the printing device. The postage meter includes reading means to read the unique identification of a printing device installed in the postage meter to determine from whether the printing device is authorized for use in the postage meter. The postage meter is operable to print postage indicia only if the printing device is authorized for use in the postage meter.

Abstract: A secure communication system for transmission of messages utilizes postage meters as terminals of the system. The postage meters include means for input of postage amount, an encryptor to encrypt postage information to be printed by a printer of the meter. The input means are used for input of a message, the encryptor encrypts the message with a key unique for an intended recipient terminal and the printer prints the encrypted message on a mail item. The terminals also are provided with reading means to read a received encrypted message and the encryption means is utilized to decrypt the received encrypted message using the unique key of the recipient terminal.

Abstract: Postage indicia are printed on mail items using an ink having a characteristic such that the ink is rendered invisible when subjected to light or light and heat of sufficient intensity. When an attempt is made to copy the imprint of a postage indicia on a mail item for which proper accounting has been effected the imprint is subjected to a butst of light or light and heat and the ink becomes invisible and prevents copying of the imprint. The imprint of the postage indicium may overly and obscure a void mark which becomes visible and is copied in the event of attempting to copy the original authentic postage indicium.

Abstract: A postage meter includes a printing device including a removable ink supply carried by the printing device. The printing device is movable on a carriage over an area in which printing of a postage indicia is to be effected and is movable to a location beyond that area for the purpose of replacement of the ink supply. Access to the printing device to replace the ink supply is by means of a hatch in a housing of the postage meter. The printing device can be moved and from the location only when the hatch is locked closed and the construction of the carriage and the mounting thereon of the printing device is such as to inhibit access to electrical connections between the printing device and the postage meter.

Abstract: An ink jet printer mechanism is disclosed in which a print receiving medium is supported in a clamp in a printing station and a print head is traversed through the printing station. A service station for the print head is provided adjacent the printing station and the print head is traversed to the service station between printing operations. The service station includes a carriage which is movable by a drive motor to bring capping and wiping elements into engagement with the print head. A mechanical linkage from the carriage opens the clamp when the capping element is aligned for engagement with the print head.

Abstract: A method of reprogramming memory storing program instruction code for controlling operation of a microprocessor in which new data can be written to the memory by the microprocessor only in a write cycle and stored data can be read from the memory by the microprocessor only in a read cycle, the memory preventing the read cycle and said write cycle occurring at the same time is disclosed. The memory has first and second sectors for storing code, the first sector storing boot code for controlling operation of the microprocessor. The disclosed method includes the steps of erasing code stored in said second sector, writing new code including the boot code to the second sector, erasing the first sector, writing new boot code in the first sector preceded by an instruction to jump to said second sector and then rendering the jump instruction ineffective so that the next boot of the microprocessor will cause the microprocessor to be controlled by the new boot code in the first sector.

Abstract: A method and apparatus is disclosed for controlling energization of a take-up motor driving a take-up spool of used ink ribbon in thermal printing apparatus. Prior to a printing cycle, the take-up motor is energized to rotate the take-up spool until ternsion in the ink ribbon caused rotation of an ink ribbon supply spool. The take-up spool is then rotated a predetermined amount and resultant rotation of the supply spool is determined by sensing means. A function dependent upon the rotation of the supply spool is determined and used during subsequent operation of the apparatus to control energization of the take-up motor such as to wind the used riobbon onto the take-up spool with a desired amount of tension in the used ribbon.

Abstract: A postage meter includes a memory including an ascending credit register to store an accumulated value of credit and an ascending tote register to store an accumulated tote value of postage charge dispensed by the postage meter in franking mail items. Accounting means of the postage meter determines whether the sum of a required postage value to be applied to a mail item and the accumulated tote value is equal to or less than the accumulated total value of credit stored in the ascending credit register and, if the sum of the required postage value and the accumulated tote value is equal to or less than the accumulated credit value, operates printing means to print a franking impression on the mail item and increments the accumulated tote value stored in the tote register by an amount equal to the required postage value.

Abstract: An ink jet printing device is disclosed in which a bore providing a nozzle for the ejection of droplets of ink is closed by a pin to prevent ejection of ink. The pin is movable into a retracted position in which the pin is withdrawn from the bore to permit ejection of droplets of ink from an ink chamber in communication with said bore. The pin is connected to a piston movable within a chamber. A spring acts on the piston to urge the pin into the bore. Withdrawal of the pin from the bore is effected by pressure of ink acting, against the spring force, on the piston. Ink is supplied selectively under pressure to the ink chamber from an ink supply. Alternatively the piston may be moved by selective application of positive and negative gaseous pressure in the chamber.

Abstract: Printing apparatus is disclosed for printing on articles of non-uniform thickness. The printing apparatus includes a thermal transfer print head to print on the article and the article is pressed toward thermal printing elements of the thermal print head by a line of individual impression rollers each individually resiliently biased toward the print head.