摘要:
A hexagonal cell honeycomb structure body has cell walls arranged in a hexagonal shaped lattice, hexagonal shaped cells partitioned by the cell walls, and a skin layer with which the outside surface of the hexagonal cell honeycomb structure body is covered. An average thickness of basic cell walls is not more than 140 μm. A relationship of Dax/P≧0.13 is satisfied, where Dax is an average of diameters of inscribed circles, each of which is inscribed in a boundary part of three basic cell walls at a junction area between opening parts of adjacent three cells. On a cross sectional surface of the body, a surface of the basic cell wall has a concave part curved toward its inside direction, and an inside angle part of adjacent two basic cell walls has a curved shape, which smoothly connects the surfaces of the adjacent two basic cell walls.
摘要:
A hexagonal-cell honeycomb structure having a plurality of cell walls having a hexagonal shape in cross-section and forming a plurality of hexagonal cell passages, and a tubular skin layer surrounding the cell walls, The thickness of the basic cell walls is 140 μm or less and an inscribed circle diameter Da inscribed at an intersectional portion of the basic cell walls 2 and an cell pitch P having the relationship Da/P≧0.13.
摘要:
A hexagonal cell honeycomb structure body has a plurality of hexagonal cells. Each hexagonal cell is surrounded by six cell walls in a hexagonal lattice shape. A R-shaped corner part of an approximate circular-arc shape is alternately formed at interior angle parts of the six cell walls forming each hexagonal cell. The three R-shaped corner parts are at the alternate internal corners of each hexagonal cell observed from a cross section of the axis direction of the hexagonal cell honeycomb structure body. A radius of curvature of each R-shaped corner part is larger than that of the interior corner part having no R-shaped corner part. The minimum radius of curvature of the R-shaped corner part is 2.8 to 5 times of a thickness of each hexagonal cell wall, namely within a range of 0.25 mm to 0.45 mm.
摘要:
A hexagonal-cell honeycomb structure having a plurality of cell walls having a hexagonal shape in cross-section and forming a plurality of hexagonal cell passages, and a tubular skin layer surrounding the cell walls, The thickness of the basic cell walls is 140 μm or less and an inscribed circle diameter Da inscribed at an intersectional portion of the basic cell walls 2 and an cell pitch P having the relationship Da/P≧0.13.
摘要:
An image heating apparatus includes a coil for generating a magnetic flux by a current flowing therethrough; an image heating member having an electroconductive layer in which an eddy current is produced by the magnetic flux by which heat is generated, the image heating member being effective to heat an image on a recording material; an electroconductive magnetic flux adjusting member movable from a first position and a second position to decrease the eddy current produced in the image heating member by the magnetic flux; a temperature sensor for sensing a temperature of image heating member; electric power control means for control electric power supplied to the coil on the basis of an output of the temperature sensor, wherein the electric power control means changes an electric power condition to be supplied to the coil before start of the movement from the first position to the second position of magnetic flux adjusting member.
摘要:
In a luminance signal forming circuit, output signals from a color television camera having complementary color filters are subjected to a matrix operation to provide a first luminance signal of good luminance reproducibility, but having a relatively low signal-to-noise (S/N) ratio, and the output signals from the camera are further simply mixed to form a second or pseudo luminance signal of relatively poor signal fidelity but having a relatively high S/N ratio. The first and second luminance signals are subjected to first and second gamma corrections, respectively, which provide a first gamma characteristic having an inclination less than that for the usual or normal gamma value, while the second gamma correction provides a characteristic having an inclination substantially smaller than that of the first gamma characteristic. The gamma corrected luminance signals are selectively included in an output luminance signal so that when an average level of the first and second luminance signals is high, at least a relatively large proportion of the output luminance signal is constituted by the first luminance signal with the first gamma characteristic and, when the average level is low, at least a relatively large proportion of the output luminance signal is constituted by the second luminance signal having the second gamma characteristic.
摘要:
The present invention aims to reduce the time period of the start up operation of an image forming apparatus corresponding to an image forming apparatus operating environment. The present invention provides an image forming apparatus includes an image bearing member; a toner image forming unit for forming a toner image on the image bearing member; an image condition detection member for detecting an image condition of the image bearing member; a setting unit for setting a plurality of toner image forming conditions determined based on the output of the image condition detection member; an environment detection member for detecting an environment condition of outside air of the image forming apparatus; and a selection unit for selecting the toner image forming conditions set by the setting unit based on the output of the environment detection device from when the power is turned on to when transitioned to an image formable state.
摘要:
A hexagonal cell honeycomb structure body has cell walls arranged in a hexagonal shaped lattice, hexagonal shaped cells partitioned by the cell walls, and a skin layer with which the outside surface of the hexagonal cell honeycomb structure body is covered. An average thickness of basic cell walls is not more than 140 μm. A relationship of Dax/P≧0.13 is satisfied, where Dax is an average of diameters of inscribed circles, each of which is inscribed in a boundary part of three basic cell walls at a junction area between opening parts of adjacent three cells. On a cross sectional surface of the body, a surface of the basic cell wall has a concave part curved toward its inside direction, and an inside angle part of adjacent two basic cell walls has a curved shape, which smoothly connects the surfaces of the adjacent two basic cell walls.
摘要:
An image heating apparatus includes a heating rotatable member for heating an image on a recording material in a heating nip; a magnetic flux generator for generating a magnetic flux for induction heat generation in the heating rotatable member; a magnetic flux confining device for confining the magnetic flux directed toward a predetermined region of the heating rotatable member from the magnetic flux generator; and a moving device for repeatedly moving the magnetic flux confining device during a heating operation between the operating position and a retracted position retracted from the operation position, when the recording material which has a predetermined width overlapping with a part of the predetermined region is continuously heated by the apparatus.
摘要:
In an electromagnetic induction heating-type heating apparatus for moving a temperature decreasing member toward or apart from an effective position where a temperature in a predetermined area is decreased in order to take countermeasure against temperature rise at a non-sheet passing portion of a heating roller, a Curie temperature of the heating roller is not less than a predetermined image heating temperature and is less than a heat-resistant temperature of the heating apparatus.