Abstract:
A method of printing on a print medium wherein a relocation error is induced in a paper transport system so as to randomize, bias, or redistribute harmonic errors associated with the paper transport system. The print medium is advanced in the ink jet printer in an advance direction to a registration location using the paper transport system. A first subset of an addressable set of ink emitting orifices in the printhead are used to print on the print medium at the registration location. The print medium is then moved in a reverse direction a predetermined distance. The print medium is again advanced in the advance direction and relocated at the registration location using the paper transport system. A second subset of the addressable set of ink emitting orifices in said printhead are used to print on the relocated print medium at the registration location.
Abstract:
A photoplotting apparatus is provided. The apparatus comprises an internal drum plotter and a media sheet handling apparatus for sequentially delivering a photosensitive media sheet to the photoplotter for exposure from a stack of such sheets. The photoplotter has reduced turbulence within the drum during exposure of the media sheet, and the sheet handling apparatus includes means for separating the sheets in the stack from interleaves disposed between adjacent sheets in the stack.
Abstract:
A single photodetecting element, in front of which a knife edge is placed, is disposed in front of a scanning surface and outside a laser beam scanning region for the scanning surface. Two mirrors or a single half mirror is disposed outside the scanning region on the side opposite to the side where the photodetecting means is disposed, and directs the light beam to the photodetecting element along two optical paths. The photodetecting element and the two mirrors or single half mirror is so disposed that lengths of the two optical paths are equal to respective lengths of two imaginary optical paths to predetermined positions spaced from the scanning surface perpendicularly in opposite directions.
Abstract:
In an image forming apparatus for recording information by scanning a movable photosensitive member with a light beam, the vibration of determined parts such as optical elements or photosensitive member is detected to activate a vibration forming device acting on said parts, thereby reducing fluctuation in the scanning pitch of the light beam on the photosensitive member in its moving direction.
Abstract:
Methods and systems are disclosed for damping unwanted vibrations or ringing of a lens in an imaging device. For example, one method includes determining a target distance to move a lens, and dividing the target distance into multiple steps having at least a first step and a subsequent step, moving the lens, via an actuator, by the first step, thereby causing a first vibration, retrieving a damping parameter indicative of a time delay, the damping parameter being based on at least one characteristic of the actuator and the number of steps, and repeating said moving the lens at least one subsequent step after delaying the subsequent step by one of the damping parameters, each moving the lens a subsequent step causing a subsequent vibration, and the damping parameters affecting the vibration such that the first and subsequent vibrations at least in part modify each other to lower overall vibration.
Abstract:
Methods and systems are disclosed for determining at least one actuation characteristic of an imaging device. For example, one method includes determining a target distance to move a lens by an actuator to focus a scene on an image sensor, where moving the lens by the actuator causes an associated lens vibration having at least one actuation characteristic, determining a scan sequence having a plurality of successive measurements, each measurement having at least a first measurement parameter and subsequent measurement parameter, each measurement parameter including at least one step and at least one time delay, moving the lens the target distance for each successive measurement based on the measurement parameters of each successive measurement, measuring a performance indicator of each successive measurement, and determining at least one actuation characteristic based on the first measurement parameter of the measurement having the highest performance indicator.
Abstract:
A reading apparatus includes a reading unit and a movement-restriction unit that restricts a movement of the reading unit. The reading unit includes a reading portion for reading an image, a holding portion that holds the reading portion. The holding portion has a first surface. The reading unit further includes a sliding portion that moves in contact with the movement-restriction unit. The sliding portion has a second surface facing the first surface. A first region is provided between the first surface of the holding portion and the second surface of the sliding portion so as to form a predetermined gap.
Abstract:
An image forming apparatus includes: an apparatus main body with an opening formed on an upper face thereof; an original document reading device that opens and closes the opening; an original document holder that is supported openably and closably by the original document reading device; a first lock mechanism that locks opening and closing of the original document reading device with respect to the apparatus main body; and a second lock mechanism that locks opening and closing of the original document holder with respect to the original document reading device, in which the first lock mechanism and the second lock mechanism are disposed inside a cabinet of the original document reading device.
Abstract:
An image forming apparatus includes an apparatus body, a cover section, an image reading device including a document hold member and a document hold member cover, and a lock mechanism. When the document hold member cover is not in close contact with the document hold member, the lock mechanism prevents opening of the cover section or sliding of the image reading device.
Abstract:
There is provided an image reading device including: a light source; an image forming unit including plural optical members that receive reflection light reflected from the document and form an image from the received light; plural light receiving units that receive the light formed into an image by the image forming unit and convert the light to an electric signal; a storing unit that stores plural kinds of correction data; a detecting unit that detects an amount of relative positional shift between a light receiving unit and the image forming unit for each light receiving unit; and a correcting unit that selects correction data suitable for each light receiving unit from the plural kinds of correction data stored in the storing unit based on the detected amount of relative positional shift, and corrects the electric signal converted by each light receiving unit based on the correction data.