Canon Kabushiki Kaisha

Shoji Kanemura

Noriyuki Chino

Kota Kiyama

Hiroyasu Nomura

Makoto Shihoh

Katsuhiko Takano

Junji Yasuda

Noribumi Koitabashi

Masaaki Naoi

James Robert Metcalfe

Noboru Koumura

Yoshinobu Sekiguchi

Manabu Sueoka

Peter William Mitchell Ilbery

Katsumasa Nishikawa

Shigeo Takenaka

Keiji Nagira

Shunpei Takenaka

Yuji Uramoto

Peter Mitchell Ilbery

A recording apparatus includes a recording unit configured to record images on a recording medium of a roll-type, the recording unit including a plurality of line-type recording heads, a first conveyance roller, located at an upstream side of the plurality of line-type recording heads, a second conveyance roller, located at a downstream side of the plurality of line-type recording heads, a first signal generation unit, including a laser doppler speed meter for detecting a surface of the recording medium being conveyed, a second signal generation unit, including a rotary encoder, a correction unit configured to correct the first signal when a period value of the first signal is outside a predetermined range, an information generation unit, and a control unit configured to control recording on the recording medium based on the variation information and the second signal so as to suppress adverse effects caused by the first conveyance roller.

Recording apparatus and method for controlling the recording apparatus

A temperature rise of a head due to a printing operation with a higher speed and a higher density is suppressed. To realize this, an inkjet printing head is provided in which a plurality of printing element substrates having an ejection opening array consisting of a plurality of ejection openings for ejecting ink are arranged on a support plate in a direction of the ejection opening array. The support plate includes therein a heat pipe and a flow path through which cooling liquid is flowed.

Inkjet printing head and inkjet printing apparatus

An optical scanning apparatus capable of properly correcting a main scanning scale factor. Upstream and downstream laser-light detection sensors of the optical scanning apparatus each generate a signal when first or second light beam passes through each of slits formed in the sensors. Based on signals, a scanning time required for each light beam to scan between the sensors is measured. A correction coefficient is decided by a correction value calculation unit based on a difference between wavelengths of the first and second light beams, a scanning time difference is calculated by a comparison unit based on the correction coefficient and scanning times of the light beams, and the downstream laser-light detection sensor is rotated by a sensor rotation drive unit to make the scanning time difference zero, whereby the slits are made parallel to each other.

Optical scanning apparatus and control method therefor

An image forming apparatus capable of enhancing the accuracy of the scanning position of a laser beam to thereby obtain a more precise image. Optical sensors detect reflected light from a surface of a photosensitive drum. During image formation, the apparatus detects the scanning speed of the laser beam in a main scanning direction based on detection signals from the respective optical sensors in each of divisional sections of an image forming area in the main scanning direction. The apparatus corrects magnification of the image in the main scanning direction, based on results of detection of the scanning speed of the laser beam in the main scanning direction.

Image forming apparatus with scanning position corrected by non-imaging laser beam

An ink jet recording head includes a flow passage for a liquid for cooling a recording element substrate. The flow passage is provided inside a support plate that supports the recording element substrate along a recording element array of the recording element substrate. The shortest distance between a recording element and the flow passage at the end of the support plate is larger than the shortest distance between a recording element and the flow passage in the middle of the support plate.

Ink jet recording head and ink jet recording apparatus

An ink jet recording head includes recording element substrates each including at least one nozzle array and heat generating resistors, a common liquid chamber having introducing and discharging ports, and a supporting member mounting the recording element substrates and in which a plurality of individual liquid chambers for supplying the ink to respective recording element substrates and a plurality of ink inlet ports for supplying the ink from the common liquid chamber to respective individual liquid chambers are formed. The individual liquid chambers are arranged in a direction of flow of the ink from the ink introducing port toward the discharging port. At least in a most upstream individual liquid chamber with respect to the direction, a center line of an associated inlet port with respect to the direction is located downstream of a center line of the upstream individual liquid chamber with respect to the direction.

Ink jet recording head

A recording apparatus includes a recording unit configured to record an image on a recording medium, a roller configured to convey the recording medium, a first signal generation unit configured to generate a first period signal according to a movement of the recording medium, a second signal generation unit configured to generate a second period signal according to a rotation of the roller, a correction unit configured to correct the first period signal when a period value of the first period signal is outside a predetermined range, an information generation unit configured to generate variation information of a moving speed of the recording medium based on the first period signal, and a control unit configured to control recording on the recording medium based on the variation information and the second period signal.

There is provided an inkjet printing apparatus having a printhead equipped with printing element row that includes printing elements having a plurality of heat-producing resistance elements. The apparatus includes a temperature sensing unit which senses the temperature of the printhead, a temperature distribution storage unit in which a temperature distribution along the printing element row, a temperature gradient calculating unit which calculates the temperature gradient of the printing element row from the temperature of the printhead sensed by the temperature sensing units, a predicting unit which predicts the temperature of each printing element using the temperature gradient and the temperature distribution along the printing element row, and a control unit which applies discharge pulses, which are decided based upon the predicted temperature from the predicting unit, to each of the printing elements.

Inkjet printing apparatus and inkjet printing method

An image recording apparatus () is disclosed, which includes forming elements () for forming an image, a memory () indicating relative desirability of utilizing the forming elements () for forming the image, and processing unit () for computing image recording signals using input image signals () and the stored data. The use of a particular forming element is thereby biased dependent upon the relative desirability data for the other forming elements and the corresponding input image signals for the other forming elements.

Defective nozzle compensation

An image recording apparatus () is disclosed, which comprises forming elements () for forming an image, a memory () indicating relative desirability of utilising the forming elements () for forming the image, and processing means () for computing image recording signals using input image signals () and the stored data. The use of a particular forming element is thereby biased dependent upon the relative desirability data of other forming elements, the corresponding input signal for the particular forming element, and a term for the particular forming element.

A full-line type printing apparatus having plural printheads which simultaneously performs printing processing using a printhead within a printing area of a print medium and preliminary discharge processing on a printhead without the printing area of the print medium in a stable manner. For this purpose, upon printing by the respective printheads based on received print data, electric power supplied to the respective printheads are calculated, and it is determined whether or not the sum of electric power supplied to simultaneously driven printheads is within a threshold value. If the sum is greater than the threshold value, a flag is set. Next, upon print-output of the print data, the existence/absence of the flag is checked, and if the flag is not set, normal printing is performed, while if the flag is set, a printhead driving frequency is changed before printing.

Inkjet printing apparatus

There are provided a conveying device capable of detecting a driving state of a conveying member with a simplified structure not requiring an encoder and the like, and an image-recording apparatus having the conveying device. A detector for detecting a surface aspect of a placing section of the conveying member is provided so as to recognize an operating state of the conveying member corresponding to the result detected by the detector.

Conveying device and image recording apparatus having the same

A sheet conveying apparatus and an image recording apparatus in which an electrode at a particular position on a conveying belt is formed in a particular aspect, whereby the position can be recognized without a marker or the like being discretely required. The sheet conveying apparatus and the image recording apparatus have a conveying belt for conveying a sheet, and comb-teeth electrodes having a plurality of electrodes installed in the conveying direction of the conveying belt, and the electrode at a particular position among the comb-teeth electrodes is formed in a particular aspect, and a probe for detecting the aspect of the electrode is provided, and the operation is controlled on the basis of the information by the probe.

Electrostatic sheet conveyor control based on detection of particular aspects of electrode groups and recording apparatus having same

A word processor is capable of communicating with a remote facsimile apparatus and with a remote word processor. The word processor comprises a first processing unit for receiving and reproducing a facsimile signal and a second processing unit for receiving coded character data.

Information processing system including a word processor capable of

Method and apparatus for effecting thermal recording on a sheet of a recording medium with the aid of a reusable ribbon which can be repeatedly used for recording a plurality of times. The recording operation is performed during forward movement as well as during return movement of a thermal head while the ink ribbon is wound and unwound. On completion of a predetermined number of recording operations in both direction further recording is stopped and the thermal head is returned to its home position without any displacement of the ink ribbon. Thereafter, the above-mentioned steps are repeated. The reusable ribbon is wound by a length equal to M/N of a line every time recording is performed on M lines in the two-way recording mode, where N represents the number of recording operations for which a portion of the reusable ink ribbon can be repeatedly used. When a non-reusable ink ribbon is used, this fact is detected and the result of detection is discriminated by a CPU to effect unidirectional recording; when a reusable ink ribbon is used, this fact is detected to effect irregular two directional recording, and when no ink ribbon is used, this fact is detected to effect complete two directional recording.

Growing community of inventors

Sagamihara, Japan

Shoji Kanemura