1. A closure for a vessel, comprising:
a hub having an access opening to the vessel, the hub having a circumferential stop face and a plurality of recesses each extending radially outward from an adjacent inner surface of the hub;
a door for positioning between the stop surface and the vessel;
a latch member for bringing the door to sealing engagement with the stop member; and
a plurality of lugs each extending radially outward from an adjacent exterior surface of the door, such that a respective lug engages the hub about a respective recess to seal the door to the hub, and the door may be moved to pass through the plurality of recesses and out of the hub.
2. A closure as defined in claim 1, further comprising:
a pivot mechanism for pivoting the door with respect to the hub.
3. A closure as defined in claim 1, further comprising:
an annular seal for sealing between the door and the hub, the annular seal being selected from one of a metal seal, an elastomeric seal, and a polymeric seal.
4. A closure as defined in claim 1, wherein the door includes a portion having an elliptical cross-section.
5. A closure as defined in claim 1, wherein the door is suspended closely adjacent its center of gravity.
6. A closure as defined in claim 1, wherein an exterior surface of the door without the plurality of lugs has a generally circular configuration.
7. A closure as defined in claim 1, wherein the circumferential stop face is fixedly positioned to the hub.
8. A closure as defined in claim 1, wherein each of the plurality of lugs is fixedly positioned on the door.
9. A closure for a vessel, comprising:
a hub having an access opening to the vessel, the hub having a circumferential stop face and one or more of recesses each extending radially outward from an adjacent inner surface of the hub, the circumferential stop face being fixedly positioned on the hub;
a door for positioning between the stop surface and the vessel;
a latch member for bringing the door to sealing engagement with the stop member; and
one or more lugs each extending radially outward from an adjacent exterior surface of the door, each of the one or more lugs being fixedly positioned on the door, such that a respective lug engages the hub about a respective recess to seal the door to the hub, and the door may be moved to pass through the one or more recesses and out of the hub.
10. A closure as defined in claim 9, further comprising:
a pivot mechanism for pivoting the door with respect to the hub.
11. A closure as defined in claim 9, further comprising:
an annular seal for sealing between the door and the hub, the annular seal being selected from one of a metal seal, an elastomeric seal, and a polymeric seal.
12. A closure as defined in claim 9, wherein an exterior surface of the door without the one or more lugs has a generally circular configuration.
13. A closure as defined in claim 9, wherein the one or more recesses and one or more lugs includes at least two circumferentially opposite recesses and two circumferentially opposite lugs.
14. A method of forming a closure for a vessel, comprising:
providing a hub having an access opening to the vessel, the hub having a circumferential stop face and one or more recesses each extending radially outward from an adjacent inner surface of the hub;
positioning a door between the stop surface and the vessel;
forming one or more of lugs each extending radially outward from an adjacent exterior surface of the door, such that a respective lug engages the hub about a respective recess to seal the door to the hub;
moving the door into sealing engagement with the stop member; and
pivoting the door to pass the door and the one or more lugs through the one or more recesses and out of the hub.
15. A method as defined in claim 14, further comprising:
providing an annular seal between the door and the hub, the annular seal being selected from one of a metal seal, an elastomeric seal, and a polymeric seal.
16. A method as defined in claim 14, further comprising:
suspending the door while within the hub closely adjacent its center of gravity.
17. A method as defined in claim 14, wherein an exterior surface of the door without the plurality of lugs has a generally circular configuration.
18. A method as defined in claim 14, wherein the circumferential stop face is fixedly positioned to the hub.
19. A method as defined in claim 14, wherein each of the one or more of lugs is fixedly positioned on the door.
20. A method as defined in claim 14, wherein the one or more recesses and the one or more lugs includes at least two circumferentially opposite recesses and at least two circumferentially opposite lugs.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An image-processing apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text; and
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, the pattern image having a first transmittance in a case that a size of the region is greater than or equal to a threshold, the pattern image having a second transmittance that is smaller than the first transmittance in a case that the size of the region is smaller than the threshold.
2. An image-processing apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text; and
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region in a case that a percentage of the area occupied by the red text is greater than or equal to a threshold.
3. An image-processing apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text; and
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region whose distance from another region exceeds a threshold in a case that a plurality of regions containing red text is present.
4. An image-processing apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text; and
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range,
if a size of the region is greater than or equal to a first threshold, the pattern image occupies a first percentage of an area of the region, and in addition, expands the area in a case that a percentage of the area occupied by the red text is greater than or equal to a second threshold,
if the size of the region is smaller than the first threshold, the pattern image occupies a second percentage, which is greater than the first percentage, of the area, and in addition, expands the area in a case that a plurality of regions containing red text is present and a distance from another region exceeds a third threshold.
5. An image-forming apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text;
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, the pattern image having a first transmittance in a case that a size of the region is greater than or equal to a threshold, the pattern image having a second transmittance that is smaller than the first transmittance in a case that the size of the region is smaller than the threshold; and
an image forming unit that forms, on a recording medium, an image based on the image data generated by the generating unit.
6. An image-forming apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text;
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region in a case that a percentage of the area occupied by the red text is greater than or equal to a threshold; and
an image forming unit that forms, on a recording medium, an image based on the image data generated by the generating unit.
7. An image-forming apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text;
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region whose distance from another region exceeds a threshold in a case that a plurality of regions containing red text is present; and
an image forming unit that forms, on a recording medium, an image based on the image data generated by the generating unit.
8. An image-forming apparatus comprising:
a memory that stores a red color range occurring within a color space;
an acquiring unit that acquires image data representing an image containing text;
a generating unit that generates, based on the image data acquired by the acquiring unit, image data in which a pattern image is disposed in a region containing text whose color is within the red color range,
if a size of the region is greater than or equal to a first threshold, the pattern image occupies a first percentage of an area of the region, and in addition, expands the area in a case that a percentage of the area occupied by the red text is greater than or equal to a second threshold,
if the size of the region is smaller than the first threshold, the pattern image occupies a second percentage, which is greater than the first percentage, of the area, and in addition, expands the area in a case that a plurality of regions containing red text is present and a distance from another region exceeds a third threshold; and
an image forming unit that forms, on a recording medium, an image based on the image data generated by the generating unit.
9. An image-processing method comprising:
storing a red color range occurring within a color space;
acquiring image data representing an image containing text; and
generating, based on the image data acquired, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, the pattern image having a first transmittance in a case that a size of the region is greater than or equal to a threshold, the pattern image having a second transmittance that is smaller than the first transmittance in a case that the size of the region is smaller than the threshold.
10. An image-processing method comprising:
storing a red color range occurring within a color space;
acquiring image data representing an image containing text; and
generating, based on the image data acquired, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region in a case that a percentage of the area occupied by the red text is greater than or equal to a threshold.
11. An image-processing method comprising:
storing a red color range occurring within a color space;
acquiring image data representing an image containing text; and
generating, based on the image data acquired, image data in which a pattern image is disposed in a region containing text whose color is within the red color range, expands an area of the region whose distance from another region exceeds a threshold in a case that a plurality of regions containing red text is present.