IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0222418
(2002-08-16)
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발명자
/ 주소 |
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대리인 / 주소 |
Reising, Ethington, Barnes, Kisselle, P.C.
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인용정보 |
피인용 횟수 :
9 인용 특허 :
14 |
초록
▼
A power dolly is disclosed having an elongated main frame and load bed with a pair of traction wheels at the front end and a pivot wheel at the rear end with a manual steering handle behind the pivot wheel. The load bed is supported on the dolly frame in an inclined position with the bed sloped down
A power dolly is disclosed having an elongated main frame and load bed with a pair of traction wheels at the front end and a pivot wheel at the rear end with a manual steering handle behind the pivot wheel. The load bed is supported on the dolly frame in an inclined position with the bed sloped downwardly from the rear end to the front end. A crane with a mast and boom is mounted at the front of the dolly. The boom is angularly adjustable through 180 degrees rearwardly of the mast.
대표청구항
▼
A power dolly is disclosed having an elongated main frame and load bed with a pair of traction wheels at the front end and a pivot wheel at the rear end with a manual steering handle behind the pivot wheel. The load bed is supported on the dolly frame in an inclined position with the bed sloped down
A power dolly is disclosed having an elongated main frame and load bed with a pair of traction wheels at the front end and a pivot wheel at the rear end with a manual steering handle behind the pivot wheel. The load bed is supported on the dolly frame in an inclined position with the bed sloped downwardly from the rear end to the front end. A crane with a mast and boom is mounted at the front of the dolly. The boom is angularly adjustable through 180 degrees rearwardly of the mast. ding elements, wherein the recording elements generate ink ejection energy to effect recording; a plurality of reference elements disposed adjacent at least each of the opposite ends of the array of said recording elements and having electric resistances corresponding to the electric resistances of said recording elements; and storing means for storing the electric resistances of said reference elements, a median thereof or a reference value corresponding to the median, wherein the median or the reference value are available for determination of amounts of electric energy of actuating signals to be supplied to the recording elements to generate the ink ejection energy. 2. An ink jet recording head according to claim 1, wherein said recording elements comprise heat generating elements. 3. An ink jet recording head according to claim 1, wherein the array of the recording elements has a length not less than 20 mm. 4. An ink jet recording head according to claim 1, wherein an additional reference element is disposed between said reference elements disposed adjacent to the ends of the array of the recording elements. 5. An ink jet recording head according to claim 1, wherein measuring electrodes are connected to opposite ends of each of the reference elements. 6. An ink jet recording head according to claim 1, wherein a measuring electrode is connected to one end of each of the reference elements disposed adjacent the opposite ends of the array of the recording elements, wherein the other ends of the reference elements are connected by wiring. 7. An ink jet recording head according to claim 6, wherein the resistance of the wiring is not more than 1/10 a total of the resistances of the reference elements. 8. An ink jet recording head according to claim 1, wherein said array of the recording elements is divided into a plurality of groups of said recording elements, and said plurality of reference elements are disposed at least at the opposite ends of the respective groups of the recording elements. 9. An ink jet recording head according to claim 8, wherein at least one recording element driving signal contact is connected to each of the groups of said recording elements to supply driving signals for generating the ejection energy to said recording elements therein with the same pulse width to cause said recording elements to generate the ejection energy. 10. An ink jet recording head according to claim 8, wherein the groups of the recording elements have a length not less than 20 mm. 11. An ink jet recording apparatus comprising: a recording head, including a substrate; a plurality of recording elements arranged in an array on said substrate, said recording elements having electric resistances with a variance not less than 4% from a resistance of at least one of said recording elements, wherein the recording elements generate ink ejection energy to effect recording; and a plurality of reference elements disposed adjacent at least each of the opposite ends of the array of said recording elements and having electric resistances corresponding to the electric resistances of said recording elements, wherein actuating signals of electric energy determined on the basis of a median of the electric resistances of said reference elements are supplied to said recording elements to generate the ejection energy. 12. An ink jet recording apparatus according to claim 11, wherein said recording elements comprise heat generating elements. 13. An ink jet recording apparatus according to claim 11, wherein the array of the recording elements has a length not less than 20 mm. 14. An ink jet recording apparatus according to claim 11, wherein an additional reference element is disposed between said reference elements disposed adjacent to the ends of the array of the recording elements. 15. An ink jet recording apparatus according to claim 11, wherein measuring electrodes are connected to opposite ends of each of the reference elements. 16. An ink jet recording apparatus according to claim 11, wherein a measuring electrode is connected to one end of the reference elements disposed adjacent the opposite ends of the array of the recording elements, wherein the other ends of the reference elements are connected by wiring. 17. An ink jet recording apparatus according to claim 16, wherein the resistance of the wiring is not more than 1/10 a total of the resistances of the measuring elements. 18. An ink jet recording apparatus according to claim 11, wherein said array of the recording elements is divided into a plurality of groups of said recording elements, and said plurality of reference elements are disposed at least at the opposite ends of the respective groups of the recording elements. 19. An ink jet recording apparatus according to claim 18, wherein at least one recording element driving signal contact is connected to each of the groups of said recording elements to supply driving signals for generating the ejection energy to said recording elements therein with the same pulse width to cause said recording elements to generate the ejection energy. 20. An ink jet recording apparatus according to claim 19, wherein the amounts of the electric energy of the driving signals to be supplied to said recording elements are capable of being controlled for respective groups. 21. An ink jet recording apparatus according to claim 19, wherein the amounts of the electric energy of the driving signals to be supplied to said recording elements are the same within the respective groups. 22. An ink jet recording apparatus according to claim 18, further comprising storing means for storing the median or the reference value corresponding thereto. 23. An ink jet recording apparatus according to claim 18, wherein said recording elements comprise heat generating elements. 24. An ink jet recording apparatus according to claim 18, wherein the groups of the recording elements have a length not less than 20 mm. 25. An ink jet recording apparatus according to claim 18, wherein an additional reference element is disposed between said reference elements disposed adjacent to the ends of the array of the recording elements. 26. An ink jet recording apparatus according to claim 18, wherein measuring electrodes are connected to opposite ends of each of the reference elements. 27. An ink jet recording apparatus according to claim 18, wherein a measuring electrode is connected to one end of each of the reference elements disposed adjacent the opposite ends of the array of the recording elements, wherein the other ends of the reference elements are connected by wiring. 28. An ink jet recording apparatus according to claim 27, wherein the resistance of the wiring is not more than 1/10 a total of the electric resistances of the reference elements. 29. A manufacturing method for an ink jet recording head including a substrate, a plurality of recording elements arranged in an array on the substrate, the recording elements having electric resistances with a variance not less than 4% from a resistance of at least one of the recording elements, wherein the recording elements generate ink ejection energy to effect recording, a plurality of reference elements disposed adjacent at least each of the opposite ends of the array of the recording elements and having electric resistances corresponding to the electric resistances of the recording elements, and storing means for storing the resistances of the reference elements, a median thereof or a reference value corresponding to the median, wherein the median or the reference value are available for determination of amounts of electric energy of actuating signals to be supplied to the recording elements to generate the ink ejection energy, said method comprising: a step of measuring the electric resistances of the plurality of reference elements; a step of calculating a median of the electric resistances of the reference elements or a reference value correspondi
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