Abstract: A roll sheet with a continuous sheet wound in a roll form is rotated in a forward direction to supply the sheet to a printing unit. A sensor whose output is changed in accordance with a distance between the sensor and the sheet is used. A rotation direction of the roll sheet is switched from an opposite direction to the forward direction on the basis of the output of the sensor during rotation of the roll sheet in the opposite direction.

Abstract: A roll sheet with a continuous sheet wound in a roll form is rotated in a forward direction to supply the sheet to a printing unit. A sensor whose output is changed in accordance with a distance between the sensor and the sheet is used. A rotation direction of the roll sheet is switched from an opposite direction to the forward direction on the basis of the output of the sensor during rotation of the roll sheet in the opposite direction.

Abstract: A print apparatus includes a holding unit to hold a roll sheet obtained by winding a sheet, a driving unit, a separation flapper, a pressure contact roller, a print unit, a displacement sensor, and a control unit. The driving unit rotates the held roll sheet. The separation flapper follows a roll sheet surface to separate the sheet from the roll sheet. The pressure contact roller comes into pressure contact with the roll sheet surface. The print unit prints an image on the sheet supplied by rotating the roll sheet in pressure contact with the pressure contact roller in a forward direction. The displacement sensor detects a separation flapper displacement amount according to separation flapper rotation when the sheet is supplied to the print unit after a roll sheet front end is detected. The control unit stops the roll sheet rotation when the amount of displacement exceeds a threshold.

Abstract: Automatic sheet feeding of an installed roll is performed more reliably. To this end, a leading end of a sheet is detected on the basis of a change in an output value of a sensor while causing a roll to rotate in a winding direction using a sensor capable of detecting a distance to the sheet separated from the roll. After the detection, the roll is caused to rotate in a feeding direction, and a feeding state of the sheet is determined on the basis of a change in the output value of the sensor.

Abstract: A sheet supplying apparatus, in which a user can select either automatic sheet feeding or manual sheet feeding, includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, a second sensor that detects the leading end portion which is manually set in a conveyance path by the user, and a determination unit configured to determine whether or not automatic sheet feeding is performed on the basis of a detection result of the second sensor.

Abstract: In a sheet supply apparatus, a type of sheet to be used can be specified using a sensor that detects a sheet separated from a roll at the time of automatic sheet feeding. The sheet supplying apparatus includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects the sheet separated from an outer circumferential surface of the roll, and a specifying unit. In a case in which the sensor detects a leading end portion of the sheet while the roll is being rotated in the second direction, the driving unit changes a rotation direction of the roll from the second direction to the first direction and feeds the sheet, and the specifying unit is configured to specify a type of the sheet on the basis of an output of the sensor while the roll is being rotated in the second direction.

Abstract: A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

Abstract: A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

Abstract: According to an embodiment of this invention, the following processing is performed to solve a problem of accurately determining an abnormal state in a carriage by using an acceleration sensor. Output values from a plurality of acceleration sensors mounted in locations which have low degrees of mechanical/physical coupling in a carriage and a printing apparatus main body are transformed into data in a frequency domain. Subsequently, a carriage operation abnormality and a level of the abnormal state are determined based on a plurality of acceleration values in the frequency domain and a comparison of magnitudes of the acceleration values.

Abstract: It is an object of the present invention to specify a type of sheet to be used using a sensor that detects a sheet separated from a roll at the time of automatic sheet feeding. A sheet supplying apparatus according to the present invention includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects the sheet separated from an outer circumferential surface of the roll, wherein, in a case in which the sensor detects a leading end portion of the sheet while the roll is being rotated in the second direction, the driving unit changes a rotation direction of the roll from the second direction to the first direction and feeds the sheet, and wherein the sheet supplying apparatus further includes a specifying unit configured to specify a type of the sheet on the basis of an output of the sensor while the roll is being rotated in the second direction.

Abstract: It is an object of the present invention to provide a sheet supplying apparatus which is capable of winding the sheet tightly. A sheet supplying apparatus according to the present invention includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, and a contact body that presses the outer circumferential surface, in which, before the sheet is fed, in a state in which the contact body presses the outer circumferential surface, the driving unit causes the roll to continuously rotate in the second direction until a detection cycle of the leading end portion by the sensor is smaller than a predetermined value.

Abstract: A roll sheet with a continuous sheet wound in a roll form is rotated in a forward direction to supply the sheet to a printing unit. A sensor whose output is changed in accordance with a distance between the sensor and the sheet is used. A rotation direction of the roll sheet is switched from an opposite direction to the forward direction on the basis of the output of the sensor during rotation of the roll sheet in the opposite direction.

Abstract: A roll sheet in which a continuous sheet is wound in a roll form is caused to rotate in a forward direction to supply the sheet to a printing unit. First and second sensors are arranged at positions facing an outer circumferential surface of the roll sheet and deviated in an axis line direction of the roll sheet. Outputs of the first and second sensors are changed in accordance with a distance to the sheet of the roll sheet. A rotation direction of the roll sheet is switched from a forward direction to a reverse direction on the basis of the outputs of the first and second sensors while the roll sheet is being rotated in the reverse direction.

Abstract: Automatic sheet feeding of an installed roll is performed more reliably. To this end, a leading end F of a sheet is detected on the basis of a change in an output value of a sensor while causing a roll R to rotate in a winding direction using the sensor capable of detecting a distance to the sheet separated from the roll R. After the detection, the roll R is caused to rotate in a feeding direction, and a feeding state of the sheet is determined on the basis of the change in the output value of the sensor.

Abstract: It is an object of the present invention to provide a sheet supplying apparatus in which the user can select either automatic sheet feeding or manual sheet feeding. A sheet supplying apparatus of the present invention includes a driving unit configured to cause a roll including a wound consecutive sheet to rotate in a first direction for feeding the sheet or a second direction opposite to the first direction, a first sensor that detects a leading end portion of the sheet separated from an outer circumferential surface of the roll, a second sensor that detects the leading end portion which is manually set in a conveyance path by a user, and a determination unit configured to determine whether or not automatic sheet feeding is performed on the basis of a detection result of the second sensor.

Abstract: According to an embodiment of this invention, the following processing is performed to solve a problem of accurately determining an abnormal state in a carriage by using an acceleration sensor. Output values from a plurality of acceleration sensors mounted in locations which have low degrees of mechanical/physical coupling in a carriage and a printing apparatus main body are transformed into data in a frequency domain. Subsequently, a carriage operation abnormality and a level of the abnormal state are determined based on a plurality of acceleration values in the frequency domain and a comparison of magnitudes of the acceleration values.

Abstract: A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

Abstract: A recording apparatus includes a sensor including a light emitting element for emitting light to a recording medium, and a light receiving element for receiving the emitted light and reflected by the recording medium, configured to, via the light emitting and light receiving elements, measure a patch recorded on the recording medium by a recording head; a calibration member configured to reflect the emitted light and to be used to calibrate the sensor based on a result of optical measurement of the calibration member performed by receiving, via the light receiving element, reflected light reflected by the calibration member; and a detection unit configured to detect dirtiness of the calibration member based on the result of the optical measurement of the calibration member by the sensor and a result of optical measurement of the calibration member performed before the measurement.

Abstract: A recording apparatus includes a sensor including a light emitting element for emitting light to a recording medium, and a light receiving element for receiving the emitted light and reflected by the recording medium, configured to, via the light emitting and light receiving elements, measure a patch recorded on the recording medium by a recording head; a calibration member configured to reflect the emitted light and to be used to calibrate the sensor based on a result of optical measurement of the calibration member performed by receiving, via the light receiving element, reflected light reflected by the calibration member; and a detection unit configured to detect dirtiness of the calibration member based on the result of the optical measurement of the calibration member by the sensor and a result of optical measurement of the calibration member performed before the measurement.

Abstract: In an apparatus including an irradiation unit capable of irradiating a sheet with at least either visible light or ultraviolet light, and an acquisition unit which acquires a spectral reflectance for each of a plurality of wavelength regions based on light reflected by the sheet, a spectral reflectance acquired by the acquisition unit when the sheet is irradiated with the visible light is stored in a memory unit. A storing unit stores, in the memory unit, a spectral reflectance in a wavelength region shorter than a predetermined wavelength among spectral reflectances acquired by the acquisition unit when the sheet is irradiated with both the visible light and the ultraviolet light.