Certain examples described herein relate to printing systems and methods of operating the same. In an example of a printing system, a porosity determiner determines a porosity of a print medium and a signal generator generates a signal relating to a state of a printing fluid collector based on the porosity determined. In an example of a method of operating a printing system, a pressure measurement is obtained from a vacuum system of the printing system when a print medium is present on a media path of the printing system. This is compared to at least one predefined pressure range and, based on the comparison, an indication is provided setting out a state of a printing fluid collector.

A tape cassette includes a box-like housing, a tape mounted within the housing, a hole and a first indicator portion. The housing includes a top wall having a top surface, a bottom wall having a bottom surface and opposing the top wall, and a front wall having a specified height and being formed along peripheries of the top wall and the bottom wall. The hole is provided in the front wall. The first indicator portion includes at least one first aperture and indicates a first element among a plurality of elements of a type of the tape. The first indicator portion is provided in a portion, spaced from the front wall, of the bottom wall. The hole and the one first aperture is located to intersect a virtual line orthogonal to the front wall when viewing along a vertical direction orthogonal to the top wall and the bottom wall.

A feeding apparatus includes a measurement unit measuring an attribute of a sheet fed by a feeding unit to obtain an attribute value; a notification control unit making a notification of information representing sheet types in accordance with the attribute value obtained by the measurement unit; a selection unit accepting selection of a sheet type after the notification; a setting unit setting the sheet type selected by the selection unit as a type of the sheet; a history storage unit storing history information serving as information of sheet types accepted once by the selection unit; and a reference storage unit storing reference information serving as reference attribute values. The notification of the information represents the sheet types in a notification order decided based on the reference attribute values stored in the history information and the attribute value obtained by the measurement unit.

An image forming device includes: a print engine to form an image on a medium, a sensor to irradiate light onto the medium and to detect an amount of light transmitted through the medium, and a processor to control the print engine based on the detected transmitted light amount and temperature data.

A print consumable may include a rotatable core, a roll of dispensable print substrate, and a radio-frequency identification (RFID) tag. The roll of the dispensable print substrate may be dispensably secured to the core. The RFID tag may be secured to the core and configured to rotate about a core axis. The RFID tag includes an RFID antenna coupled to an RFID chip. The RFID chip may include a print counter, a stock-keeping unit (SKU) code, and a consumable authentication code. A print system may include a housing, a holder to hold the print consumable, a print head, a transceiver, a trace antenna for reading an RFID tag of the print consumable, and a controller. The controller may be configured to receive a signal from the transceiver indicative of one or more of the print counter, the SKU code, and the consumable authentication code received from the RFID antenna.

A method for operating a printing machine having a processor and a device for detecting features of printing substrates includes storing print jobs with the printing substrates appropriate thereto in a database. Features of at least one printing substrate are detected by using the device. The detected features of the at least one printing substrate are compared by the processor with the printing substrates of the print jobs from the database. The processor selects at least one print job in which the printing substrates of the print jobs from the database correspond to the at least one detected printing substrate or attain a predefined similarity. The at least one print job selected by the processor is subsequently executed on the printing machine.

A detection device includes an electrostatic capacitance sensor including an electrode pair and being configured to detect electrostatic capacitance of a medium brought into contact with the electrode pair, and a first ultrasonic wave sensor including a first transmission unit configured to transmit an ultrasonic wave and a first reception unit configured to receive an ultrasonic wave transmitted from the first transmission unit. The transmission unit and the reception unit are positioned to sandwich the medium.

An information processing apparatus includes a processor configured to: acquire physical property information on physical properties of a recording medium and on physical properties of ink to be ejected onto the recording medium and setting information on a setting of a device configured to eject the ink onto the recording medium, the ink including a first ink and a second ink; derive a feature quantity relating to characteristics of the ink based on behavior of the first ink to be ejected onto the recording medium and of the second ink to be ejected to a position adjacent to the first ink ejected, using the physical property information and the setting information; and output information on graininess of an image to be formed on the recording medium based on the feature quantity.

A server, which is capable of communicating with a printer or printers, each performing radio frequency identification (RFID) communication with a RFID tag, contains: a record unit configured to record, in a memory device, printer identification information for identifying a printer, tag identification information for identifying a RFID tag, and communication parameters with which the printer performs RFID communication, in an associated manner; a first obtaining unit configured to obtain, from a printer, printer identification information and tag identification information read by the printer; an identifying unit configured to identify communication parameters associated with the printer identification information and the tag identification information obtained by the first obtaining unit; and a first transmission unit configured to transmit the communication parameters identified by the identifying unit, to the printer.

An information processing apparatus includes a processor configured to: obtain characteristic values including smoothness and basis weight of a recording medium; and identify the type of the recording medium on the basis of the smoothness and the basis weight.