초록 ▼

A system for the protection of airport runway light fixtures and markers is disposed at or near the edge of aircraft runways, taxiway and airport signs. The system includes a thin flexible mat having an axial opening proportioned to enable placement of a runway light fixture or marker therethrough;

A system for the protection of airport runway light fixtures and markers is disposed at or near the edge of aircraft runways, taxiway and airport signs. The system includes a thin flexible mat having an axial opening proportioned to enable placement of a runway light fixture or marker therethrough; and peripherally disposed apertures within the mat. The system further includes several anchors for the mat, each of which comprise a planar head, and means for penetration and engagement of earth upon which the mat is positioned. The penetration and engagement elements of each anchor integrally and rigidly depend from a lower surface of the planar head at a central axis. A greatest transverse cross-section of the engagement element is proportioned for complemental insertion within the peripheral apertures of the convex mat. The planar heads of the anchors each engage the mat when the engagement means have fully penetrated the earth upon which the mat is to be secured. The upper surface of the planar head of each anchor preferably includes an axially disposed nut, Allen head screw or the like proportioned for complemental engagement with the drive element of a power tool to effect rotation of the anchor into the earth.

대표청구항 ▼

A system for the protection of airport runway light fixtures and markers is disposed at or near the edge of aircraft runways, taxiway and airport signs. The system includes a thin flexible mat having an axial opening proportioned to enable placement of a runway light fixture or marker therethrough;

A system for the protection of airport runway light fixtures and markers is disposed at or near the edge of aircraft runways, taxiway and airport signs. The system includes a thin flexible mat having an axial opening proportioned to enable placement of a runway light fixture or marker therethrough; and peripherally disposed apertures within the mat. The system further includes several anchors for the mat, each of which comprise a planar head, and means for penetration and engagement of earth upon which the mat is positioned. The penetration and engagement elements of each anchor integrally and rigidly depend from a lower surface of the planar head at a central axis. A greatest transverse cross-section of the engagement element is proportioned for complemental insertion within the peripheral apertures of the convex mat. The planar heads of the anchors each engage the mat when the engagement means have fully penetrated the earth upon which the mat is to be secured. The upper surface of the planar head of each anchor preferably includes an axially disposed nut, Allen head screw or the like proportioned for complemental engagement with the drive element of a power tool to effect rotation of the anchor into the earth. as been performed, the greater the lightness of the ejected ink, the greater the number of times that said ink ejection is performed. 3. An ink jet recording apparatus according to claim 1, wherein said recovery mechanism includes wiping means for wiping said discharge ports of said recording heads. 4. An ink jet recording apparatus according to claim 1, wherein said selection means selects said recording head on which said recovery operation is to be performed according to a length of a shutdown period during which said recording heads have not been operated. 5. An ink jet recording apparatus according to claim 1, wherein said recording heads include heat energy generating means for generating heat energy to eject ink from said discharge ports. 6. An ink jet recording apparatus having a plurality of recording heads for respectively ejecting through discharge ports a plurality of inks of different kinds and a recovery mechanism for performing a recovery operation on a selected one of said plurality of recording heads by sucking ink through said discharge ports of said selected recording head, said apparatus comprising: scanning means for moving each of said plurality of recording heads to a position facing said recovery mechanism, said recording heads being mounted on said scanning means; ink ejection means for repeatedly ejecting ink from said discharge ports of said selected recording head; selection means for selecting a recording head from said plurality of recording heads on which said recovery operation is to be performed; and ejection control means for controlling said ink ejection means so that a number of times that ink is to be ejected from said selected recording head on which said recovery operation has been performed according to the kind of ink used by a preceding selected recording head on which said recovery operation has been performed, wherein said ejection control means controls the number of times ink ejection is performed when the ejected ink is of least lightness and when the ejected ink is of greatest lightness so that the greater the lightness of the ink used by said preceding selected recording head on which said recovery operation has been performed, the smaller the number of times that said ink ejection is performed, and controls the number of times said ink ejection is performed so that for a given preceding selected recording head on which said recovery operation has been performed, the greater the lightness of the ejected ink, the greater the number of times that said ink ejection is performed. 7. An ink jet recording apparatus according to claim 6, wherein said ejection control means controls the number of times said ink ejection is performed on any said selected recording head so that the lower a lightness of an ink used by said recording head, the smaller the number of times that said ink ejection is performed. 8. An ink jet recording apparatus according to claim 6, wherein said recovery mechanism includes wiping means for wiping said discharge ports of said recording heads. 9. An ink jet recording apparatus according to claim 6, wherein said selection means selects said recording head on which said recovery operation is to be effected according to a length of a shutdown period during which said recording heads have not been operated. 10. An ink jet recording apparatus according to claim 6, wherein said recording heads include heat energy generating means for generating heat energy to eject ink from said discharge ports. 11. A recording head recovery method for an ink jet recording apparatus having a plurality of recording heads for respectively ejecting through discharge ports a plurality of inks of different lightness, a recovery mechanism for performing a recovery operation on a selected one of said plurality of recording heads by sucking ink through said discharge ports of said selected recording head and an ink ejection mechanism for repeatedly ejecting ink from said discharge port