Abstract: To prevent a preview of contents by a person who does not have a right to view or listen, by distributing encoded contents data which are difficult for a third person to decode. A new participation terminal apparatus, as well as transmitting a participation request to a parent terminal apparatus of a connection destination candidate, transmits a participation disclosure key for encoding a contents decoding key. The parent terminal of the connection destination candidate which receives the participation disclosure key from the new participation terminal apparatus generates an encoded decoding key, which is a contents decoding key encoded using the participation disclosure key received, and transmits it to the new participation terminal apparatus. The new participation terminal apparatus decodes the encoded decoding key received, using a participation secret key stored in a participation key storage section, acquiring a contents decoding key.

Abstract: In the case the die cut label sheet is mounted, by detection of threshold voltage of output signal of the photo sensor, each label provisionally adhered to a front surface of the die cut label sheet is fed to a print start position. In the case the unfixed-length roll sheet is mounted, if the feeding speed is less than 40 mm/sec, by detection of threshold voltage of output signal of the photo sensor, the feeding state of unfixed-length roll sheet is judged, or if the feeding speed is not less than 40 mm/sec, on the basis of voltage change for the predetermined potential difference portion of output signal of the photo sensor, the feeding state of unfixed-length roll sheet is judged.

Abstract: To prevent a preview of contents by a person who does not have a right to view or listen, by distributing encoded contents data which are difficult for a third person to decode. A new participation terminal apparatus, as well as transmitting a participation request to a parent terminal apparatus of a connection destination candidate, transmits a participation disclosure key for encoding a contents decoding key. The parent terminal of the connection destination candidate which receives the participation disclosure key from the new participation terminal apparatus generates an encoded decoding key, which is a contents decoding key encoded using the participation disclosure key received, and transmits it to the new participation terminal apparatus. The new participation terminal apparatus decodes the encoded decoding key received, using a participation secret key stored in a participation key storage section, acquiring a contents decoding key.

Abstract: A printer capable of printing with high quality by driving the drive motor according to information about a drive current to be applied to a drive motor of a platen roller to feed the printing medium, each of which has the information. Accordingly, the printer comprises the printing medium discrimination sensors to read information about the drive current from the printing medium and the control circuit to adjust the drive current to be applied to the feeding motor according to the information about the drive current for the printing medium.

Abstract: A printer capable of printing with high quality by driving the drive motor according to information about a drive current to be applied to a drive motor of a platen roller to feed the printing medium, each of which has the information. Accordingly, the printer comprises the printing medium discrimination sensors to read information about the drive current from the printing medium and the control circuit to adjust the drive current to be applied to the feeding motor according to the information about the drive current for the printing medium.

Abstract: A tape printer for securing a time period sufficient for processing printing data even if the rpm of a DC motor increases, when an encoder is used for detecting rotation of the DC motor. When the DC motor does not rotate at a constant speed, in principle, the encoder detects an amount of rotation of the DC motor. Accordingly, a thermal head is driven for printing, every time a predetermined angle of rotation is sensed. On the other hand, when the DC motor rotates at a constant speed, the thermal head is driven for printing at constant intervals.

Abstract: In the case the die cut label sheet is mounted, by detection of threshold voltage of output signal of the photo sensor, each label provisionally adhered to a front surface of the die cut label sheet is fed to a print start position. In the case the unfixed-length roll sheet is mounted, if the feeding speed is less than 40 mm/sec, by detection of threshold voltage of output signal of the photo sensor, the feeding state of unfixed-length roll sheet is judged, or if the feeding speed is not less than 40 mm/sec, on the basis of voltage change for the predetermined potential difference portion of output signal of the photo sensor, the feeding state of unfixed-length roll sheet is judged.

Abstract: A tape printer that prevents shifting of a printed dot due to a reverse rotation caused by the DC motor stop when power supply to a DC motor is resumed. When the power supply to the DC motor is suspended, the DC motor often rotates in a reverse direction immediately before rotation of the motor stops. The amount of reverse rotation is detected by an encoder. This amount is compensated immediately after the power supply to the DC motor is resumed. After the amount of forward rotation identical to the amount of reverse rotation amount is detected, printing is resumed by the printing head.

Abstract: A tape printer that prevents shifting of a printed dot due to a reverse rotation caused by the DC motor stop when power supply to a DC motor is resumed. When the power supply to the DC motor is suspended, the DC motor often rotates in a reverse direction immediately before rotation of the motor stops. The amount of reverse rotation is detected by an encoder. This amount is compensated immediately after the power supply to the DC motor is resumed. After the amount of forward rotation identical to the amount of reverse rotation amount is detected, printing is resumed by the printing head.

Abstract: A tape printer for securing a time period sufficient for processing printing data even if the rpm of a DC motor increases, when an encoder is used for detecting rotation of the DC motor. When the DC motor does not rotate at a constant speed, in principle, the encoder detects an amount of rotation of the DC motor. Accordingly, a thermal head is driven for printing, every time a predetermined angle of rotation is sensed. On the other hand, when the DC motor rotates at a constant speed, the thermal head is driven for printing at constant intervals.