Abstract:
An inkjet printer that has a printhead for printing onto a media substrate, and a reservoir for containing a quantity of ink, the reservoir having a lower portion for holding ink and an upper portion defining a headspace of air above the ink. A fluid connection extends between the printhead and the reservoir. A pump draws air from the headspace to lower its air pressure and thereby controls the hydrostatic pressure of the ink at the printhead.

Description:
FIELD OF THE INVENTION 
     The present invention relates to printers and in particular the fluidic architecture of inkjet printers. 
     CO-PENDING APPLICATIONS 
     The following application has been filed by the Applicant simultaneously with the present application: 
     
         
         
           
             U.S. Pat. No. 7,914,132 
           
         
       
    
     The disclosure of this co-pending application is incorporated herein by reference. 
     CROSS REFERENCES TO RELATED APPLICATIONS 
     Various methods, systems and apparatus relating to the present invention are disclosed in the following US patents/patent applications filed by the applicant or assignee of the present invention: 
                                                         6,276,850   6,520,631   6,158,907   6,539,180   6,270,177   6,405,055   6,628,430       6,835,135   6,626,529   6,981,769   7,125,338   7,125,337   7,136,186   10/920,372       7,145,689   7,130,075   7,081,974   7,177,055   7,209,257   6,443,555   7,161,715       7,154,632   7,158,258   7,148,993   7,075,684   10/943,905   10/943,906   10/943,904       10/943,903   10/943,902   6,966,659   6,988,841   7,077,748   7,255,646   7,070,270       7,014,307   7,158,809   7,217,048   11/225,172   11/255,942   11/329,039   11/329,040       7,271,829   11/442,189   11/474,280   11/483,061   11/503,078   11/520,735   11/505,858       11/525,850   11/583,870   11/592,983   11/592,208   11/601,828   11/635,482   11/635,526       10/466,440   7,215,441   11/650,545   11/653,241   11/653,240   7,056,040   6,942,334       11/706,300   11/740,265   11/737,720   11/739,056   11/740,204   11/740,223   11/753,557       11/750,285   11,758,648   11/778,559   11,834,634   11/838,878   11,845,669   6,799,853       7,237,896   6,749,301   10/451,722   7,137,678   7,252,379   7,144,107   10/503,900       10/503,898   10/503,897   7,220,068   7,270,410   7,241,005   7,108,437   7,140,792       10/503,922   7,224,274   10/503,917   10/503,918   10/503,925   10/503,927   10/503,928       10/503,929   10/503,885   7,195,325   7,229,164   7,150,523   10/503,889   7,154,580       6,906,778   7,167,158   7,128,269   6,688,528   6,986,613   6,641,315   10/503,890       10/503,891   7,150,524   7,155,395   6,915,140   6,999,206   6,795,651   6,883,910       7,118,481   7,136,198   7,092,130   6,786,661   6,808,325   10/920,368   10/920,284       7,219,990   10/920,283   6,750,901   6,476,863   6,788,336   6,322,181   6,597,817       6,227,648   6,727,948   6,690,419   10/470,947   6,619,654   6,969,145   6,679,582       10/470,942   6,568,670   6,866,373   10/102,696   7,008,044   6,742,871   6,966,628       6,644,781   6,969,143   6,767,076   6,834,933   6,692,113   6,913,344   6,727,951       7,128,395   7,036,911   7,032,995   6,969,151   6,955,424   6,969,162   10/919,249       6942315-B2   11/006,577   7,234,797   6,986,563   11/063,577   11/045,442   11/124,044       11/124,284   7,077,330   6,196,541   11/149,389   11/185,725   7,226,144   11/202,344       7,267,428   11/248,423   11/248,422   7,093,929   11/282,769   11/330,060   11/442,111       11/472,406   11/499,806   11/499,710   6,195,150   11,749,156   11,782,588   11/854,435       11/853,817   6,362,868   6,831,681   6,431,669   6,362,869   6,472,052   6,356,715       6,894,694   6,636,216   6,366,693   6,329,990   6,459,495   6,137,500   6,690,416       7,050,143   6,398,328   7,110,024   6,431,704   6,879,341   6,415,054   6,665,454       6,542,645   6,486,886   6,381,361   6,317,192   6,850,274   09/113,054   6,646,757       6,624,848   6,357,135   6,271,931   6,353,772   6,106,147   6,665,008   6,304,291       6,305,770   6,289,262   6,315,200   6,217,165   6,496,654   6,859,225   6,924,835       6,647,369   6,943,830   09/693,317   7,021,745   6,712,453   6,460,971   6,428,147       6,416,170   6,402,300   6,464,340   6,612,687   6,412,912   6,447,099   6,837,567       6,505,913   7,128,845   6,733,684   7,249,108   6,566,858   6,331,946   6,246,970       6,442,525   09/517,384   09/505,951   6,374,354   7,246,098   6,816,968   6,757,832       6,334,190   6,745,331   7,249,109   10/203,559   7,197,642   7,093,139   10/636,263       10/636,283   10/866,608   7,210,038   10/902,833   10/940,653   10/942,858   11/706,329       11/757,385   11/758,642   7,119,836   10/322,698   10/642,331   10/636,285   7,170,652       6,967,750   6,995,876   7,099,051   7,172,191   7,243,916   7,222,845   11/239,232       11/055,276   7,063,940   11/107,942   7,193,734   7,086,724   7,090,337   11/185,952       7,140,717   11/190,902   11/209,711   7,256,824   7,140,726   7,156,512   7,186,499       11/478,585   11/525,862   11/540,574   11/583,875   11/592,181   6,750,944   11/599,336       11/650,548   11,744,183   11/758,646   11/778,561   11/839,532   11/838,874   11/853,021       11/869,710   11/868,531   10/636,225   10/510,094   6,985,207   6,773,874   6,650,836       10/666,495   10/636,224   7,250,975   10/636,214   6,880,929   7,236,188   7,236,187       7,155,394   10/636,219   10/636,223   7,055,927   6,986,562   7,052,103   10/656,469       10/656,281   10/656,791   10/666,124   10/683,217   10/683,197   7,095,533   6,914,686       6,896,252   6,820,871   6,834,851   6,848,686   6,830,246   6,851,671   10/729,098       7,092,011   7,187,404   10/729,159   10/753,458   6,878,299   6,929,348   6,921,154       10/780,625   10/804,042   6,913,346   10/831,238   10/831,237   10/831,239   10/831,240       10/831,241   10/831,234   10/831,233   7,246,897   7,077,515   10/831,235   10/853,336       10/853,659   10/853,681   6,913,875   7,021,758   7,033,017   7,161,709   7,099,033       7,147,294   7,156,494   11/012,024   11/011,925   7,032,998   7,044,585   11/007,250       6,994,424   11/006,787   7,258,435   7,097,263   7,001,012   7,004,568   7,040,738       7,188,933   7,027,080   7,025,446   6,991,321   7,131,715   7,261,392   7,207,647       7,182,435   7,097,285   11/228,410   7,097,284   7,083,264   7,147,304   7,232,203       7,156,498   7,201,471   11/501,772   11/503,084   11/513,073   7,210,764   11/635,524       11/706,379   11/730,386   11/730,784   11/753,568   11/782,591   11/859,783   6,710,457       6,775,906   6,507,099   7,221,043   7,107,674   7,154,172   11/442,400   7,247,941       11/736,540   11/758,644   6,530,339   6,631,897   6,851,667   6,830,243   6,860,479       6,997,452   7,000,913   7,204,482   11/212,759   11/281,679   11/730,409   6,238,044       6,425,661   11/003,786   7,258,417   11/003,418   11/003,334   7,270,395   11/003,404       11/003,419   11/003,700   7,255,419   11/003,618   7,229,148   7,258,416   7,273,263       7,270,393   6,984,017   11/003,699   11/071,473   7,156,497   11/601,670   11,748,482       11/778,563   11/779,851   11/778,574   11/853,816   11/853,814   11/853,786   11/856,694       11/003,463   11/003,701   11/003,683   11/003,614   11/003,702   11/003,684   7,246,875       11/003,617   11/764,760   11,853,777   11/293,800   11/293,802   11/293,801   11/293,808       11/293,809   11/482,975   11/482,970   11/482,968   11/482,972   11/482,971   11/482,969       6,431,777   6,334,664   6,447,113   7,239,407   6,398,359   6,652,089   6,652,090       7,057,759   6,631,986   7,187,470   11/315,356   11/501,775   11,744,210   11/859,784       6,471,331   6,676,250   6,347,864   6,439,704   6,425,700   6,588,952   6,626,515       6,722,758   6,871,937   11/060,803   11/097,266   11/097,267   11/685,084   11/685,086       11/685,090   11/740,925   11/763,444   11/763,443   7,249,942   7,206,654   7,162,324       7,162,325   7,231,275   7,146,236   10/753,475   10/753,499   6,997,698   7,220,112       7,231,276   10/753,440   7,220,115   7,195,475   7,144,242   11/499,746   11/501,774       11/525,858   11/545,501   11/599,335   11/706,380   11,736,545   11/736,554   11/739,047       11,749,159   11/739,073   11/775,160   11/853,755   TEST   6,786,420   6,827,282       6,948,661   7,073,713   10/983,060   7,093,762   7,083,108   7,222,799   7,201,319       11/442,103   11/739,071   11/518,238   11/518,280   11/518,244   11/518,243   11/518,242       7,032,899   6,854,724   11/084,237   11/084,240   11/084,238   11/357,296   11/357,298       11/357,297   6,350,023   6,318,849   6,592,207   6,439,699   6,312,114   11/246,676       11/246,677   11/246,678   11/246,679   11/246,680   11/246,681   11/246,714   11/246,713       11/246,689   11/246,671   11/246,670   11/246,669   11/246,704   11/246,710   11/246,688       11/246,716   11/246,715   11/246,707   11/246,706   11/246,705   11/246,708   11/246,693       11/246,692   11/246,696   11/246,695   11/246,694   11/482,958   11/482,955   11/482,962       11/482,963   11/482,956   11/482,954   11/482,974   11/482,957   11/482,987   11/482,959       11/482,960   11/482,961   11/482,964   11/482,965   11/482,976   11/482,973   11/495,815       11/495,816   11/495,817   10/803,074   10/803,073   7,040,823   10/803,076   10/803,077       10/803,078   10/803,079   10/922,971   10/922,970   10/922,836   10/922,842   10/922,848       10/922,843   7,125,185   7,229,226   11/513,386   11/753,559   10/815,621   7,243,835       10/815,630   10/815,637   10/815,638   7,251,050   10/815,642   7,097,094   7,137,549       10/815,618   7,156,292   11,738,974   10/815,635   10/815,647   10/815,634   7,137,566       7,131,596   7,128,265   7,207,485   7,197,374   7,175,089   10/815,617   10/815,620       7,178,719   10/815,613   7,207,483   10/815,619   7,270,266   10/815,614   11/446,240       11/488,162   11/488,163   11/488,164   11/488,167   11/488,168   11/488,165   11/488,166       7,267,273   11/834,628   11/839,497   10/815,636   7,128,270   11/041,650   11/041,651       11/041,652   11/041,649   11/041,610   11,863,253   11,863,255   11/863,257   11,863,258       11,863,262   11/041,609   11/041,626   11/041,627   11/041,624   11/041,625   11,863,268       11,863,269   11,863,270   11,863,271   11,863,273   76,584,733   11/041,556   11/041,580       11/041,723   11/041,698   11/041,648   11,863,263   11,863,264   11,863,265   11,863,266       11,863,267   10/815,609   7,150,398   7,159,777   10/815,610   7,188,769   7,097,106       7,070,110   7,243,849   11/442,381   11/480,957   11/764,694   6,227,652   6,213,588       6,213,589   6,231,163   6,247,795   6,394,581   6,244,691   6,257,704   6,416,168       6,220,694   6,257,705   6,247,794   6,234,610   6,247,793   6,264,306   6,241,342       6,247,792   6,264,307   6,254,220   6,234,611   6,302,528   6,283,582   6,239,821       6,338,547   6,247,796   6,557,977   6,390,603   6,362,843   6,293,653   6,312,107       6,227,653   6,234,609   6,238,040   6,188,415   6,227,654   6,209,989   6,247,791       6,336,710   6,217,153   6,416,167   6,243,113   6,283,581   6,247,790   6,260,953       6,267,469   6,588,882   6,742,873   6,918,655   6,547,371   6,938,989   6,598,964       6,923,526   6,273,544   6,309,048   6,420,196   6,443,558   6,439,689   6,378,989       6,848,181   6,634,735   6,299,289   6,299,290   6,425,654   6,902,255   6,623,101       6,406,129   6,505,916   6,457,809   6,550,895   6,457,812   7,152,962   6,428,133       7,216,956   7,080,895   11/144,844   7,182,437   11/599,341   11/635,533   11/607,976       11/607,975   11/607,999   11/607,980   11/607,979   11/607,978   11/735,961   11/685,074       11/696,126   11/696,144   11/696,650   11/763,446   6,224,780   6,235,212   6,280,643       6,284,147   6,214,244   6,071,750   6,267,905   6,251,298   6,258,285   6,225,138       6,241,904   6,299,786   6,866,789   6,231,773   6,190,931   6,248,249   6,290,862       6,241,906   6,565,762   6,241,905   6,451,216   6,231,772   6,274,056   6,290,861       6,248,248   6,306,671   6,331,258   6,110,754   6,294,101   6,416,679   6,264,849       6,254,793   6,245,246   6,855,264   6,235,211   6,491,833   6,264,850   6,258,284       6,312,615   6,228,668   6,180,427   6,171,875   6,267,904   6,245,247   6,315,914       7,169,316   6,526,658   7,210,767   11/056,146   11/635,523   6,665,094   6,450,605       6,512,596   6,654,144   7,125,090   6,687,022   7,072,076   7,092,125   7,215,443       7,136,195   7,077,494   6,877,834   6,969,139   10/636,227   10/636,265   6,912,067       7,277,205   7,154,637   10/636,230   7,070,251   6,851,782   10/636,211   10/636,247       6,843,545   7,079,286   7,064,867   7,065,247   7,027,177   7,218,415   7,064,873       6,954,276   7,061,644   7,092,127   7,059,695   10/990,382   7,177,052   7,270,394       11/124,231   7,188,921   7,187,469   7,196,820   11/281,445   11/329,041   7,251,051       7,245,399   11/524,911   11/640,267   11/706,297   11/730,387   11/737,142   11/764,729       11/834,637   11/853,019   11/863,239   11/305,274   11/305,273   11/305,275   11/305,152       11/305,158   11/305,008   6,231,148   6,293,658   6,614,560   6,238,033   6,312,070       6,238,111   6,378,970   6,196,739   6,270,182   6,152,619   7,006,143   6,876,394       6,738,096   6,970,186   6,287,028   6,412,993   11/033,145   11/102,845   11/102,861       11/248,421   11/672,878   7,204,941   10/815,624   10/815,628   11,845,672   7,278,727       10/913,373   10/913,374   10/913,372   7,138,391   7,153,956   10/913,380   10/913,379       10/913,376   7,122,076   7,148,345   11/172,816   11/172,815   11/172,814   11/482,990       11/482,986   11/482,985   11/454,899   11/583,942   11/592,990   11,849,360   11/831,961       11/831,962   11/831,963   60,951,700   11/832,629   11/832,637   60,971,535   10/407,212       7,252,366   10/683,064   10/683,041   7,275,811   10/884,889   10/922,890   10/922,875       10/922,885   10/922,889   10/922,884   10/922,879   10/922,887   10/922,888   10/922,874       7,234,795   10/922,871   10/922,880   10/922,881   10/922,882   10/922,883   10/922,878       10/922,872   10/922,876   10/922,886   10/922,877   7,147,792   7,175,774   11/159,193       11/491,378   11,766,713   11/841,647   11/482,980   11/563,684   11/482,967   11/482,966       11/482,988   11/482,989   11/293,832   11/293,838   11/293,825   11/293,841   11/293,799       11/293,796   11/293,797   11/293,798   11/124,158   11/124,196   11/124,199   11/124,162       11/124,202   11/124,197   11/124,154   11/124,198   11/124,153   11/124,151   11/124,160       11/124,192   11/124,175   11/124,163   11/124,149   11/124,152   11/124,173   11/124,155       7,236,271   11/124,174   11/124,194   11/124,164   11/124,200   11/124,195   11/124,166       11/124,150   11/124,172   11/124,165   11/124,186   11/124,185   11/124,184   11/124,182       11/124,201   11/124,171   11/124,181   11/124,161   11/124,156   11/124,191   11/124,159       11/124,176   11/124,188   11/124,170   11/124,187   11/124,189   11/124,190   11/124,180       11/124,193   11/124,183   11/124,178   11/124,177   11/124,148   11/124,168   11/124,167       11/124,179   11/124,169   11/187,976   11/188,011   11/188,014   11/482,979   11/735,490       11/853,018   11/228,540   11/228,500   11/228,501   11/228,530   11/228,490   11/228,531       11/228,504   11/228,533   11/228,502   11/228,507   11/228,482   11/228,505   11/228,497       11/228,487   11/228,529   11/228,484   11/228,489   11/228,518   11/228,536   11/228,496       11/228,488   11/228,506   11/228,516   11/228,526   11/228,539   11/228,538   11/228,524       11/228,523   11/228,519   11/228,528   11/228,527   11/228,525   11/228,520   11/228,498       11/228,511   11/228,522   11/228,515   11/228,537   11/228,534   11/228,491   11/228,499       11/228,509   11/228,492   11/228,493   11/228,510   11/228,508   11/228,512   11/228,514       11/228,494   11/228,495   11/228,486   11/228,481   11/228,477   11/228,485   11/228,483       11/228,521   11/228,517   11/228,532   11/228,513   11/228,503   11/228,480   11/228,535       11/228,478   11/228,479   6,238,115   6,386,535   6,398,344   6,612,240   6,752,549       6,805,049   6,971,313   6,899,480   6,860,664   6,925,935   6,966,636   7,024,995       10/636,245   6,926,455   7,056,038   6,869,172   7,021,843   6,988,845   6,964,533       6,981,809   11/060,804   7,258,067   11/155,544   7,222,941   11/206,805   11/281,421       7,249,904   11/737,726   11,772,240   11/863,246   11/863,145   11/865,650   6,087,638       6,340,222   6,041,600   6,299,300   6,067,797   6,286,935   6,044,646   6,382,769       10/868,866   6,787,051   6,938,990   11/242,916   11/242,917   11/144,799   11/198,235       11,861,282   11,861,284   11/766,052   7,152,972   11/592,996   D529952   6,390,605       6,322,195   6,612,110   6,480,089   6,460,778   6,305,788   6,426,014   6,364,453       6,457,795   6,315,399   6,338,548   7,040,736   6,938,992   6,994,425   6,863,379       6,540,319   6,994,421   6,984,019   7,008,043   6,997,544   6,328,431   6,991,310       10/965,772   7,140,723   6,328,425   6,982,184   7,267,423   7,134,741   7,066,577       7,152,945   11/038,200   7,021,744   6,991,320   7,155,911   11/107,799   6,595,624       7,152,943   7,125,103   11/209,709   11/228,407   11/273,271   7,229,151   11/330,058       7,237,873   11/329,163   11/442,180   11/450,431   7,213,907   6,417,757   11/482,951       11/545,566   11/583,826   11/604,315   11/604,323   11/643,845   11/706,950   11/730,399       11,749,121   11/753,549   11/834,630       7,095,309   6,854,825   6,623,106       6,672,707   6,575,561   6,817,700   6,588,885   7,075,677   6,428,139   6,575,549       6,846,692   6,425,971   7,063,993   6,383,833   6,955,414   6,412,908   6,746,105       6,953,236   6,412,904   7,128,388   6,398,343   6,652,071   6,793,323   6,659,590       6,676,245   7,201,460   6,464,332   6,659,593   6,478,406   6,978,613   6,439,693       6,502,306   6,966,111   6,863,369   6,428,142   6,874,868   6,390,591   6,799,828       6,896,358   7,018,016   10/296,534   6,328,417   6,322,194   6,382,779   6,629,745       6,565,193   6,609,786   6,609,787   6,439,908   6,684,503   6,843,551   6,764,166       6,561,617   10/510,092   6,557,970   6,546,628   10/510,098   6,652,074   6,820,968       7,175,260   6,682,174   10/510,207   6,648,453   6,834,932   6,682,176   6,998,062       6,767,077   10/534,830   6,755,509   10/534,813   6,692,108   10/534,811   6,672,709       10/534,823   7,086,718   10/534,881   6,672,710   10/534,812   6,669,334   10/534,804       7,152,958   10/534,817   6,824,246   7,264,336   6,669,333   10/534,815   6,820,967       10/534,883   6,736,489   7,264,335   6,719,406   7,222,943   7,188,419   7,168,166       6,974,209   7,086,719   6,974,210   7,195,338   7,252,775   7,101,025   11/474,281       11/485,258   11/706,304   11/706,324   11/706,326   11/706,321   11/772,239   11/782,598       11/829,941   11/852,991   11,852,986   11/763,440   11/763,442   11/246,687   11/246,718       11/246,685   11/246,686   11/246,703   11/246,691   11/246,711   11/246,690   11/246,712       11/246,717   11/246,709   11/246,700   11/246,701   11/246,702   11/246,668   11/246,697       11/246,698   11/246,699   11/246,675   11/246,674   11/246,667   11/829,957   11/829,960       11/829,961   11/829,962   11/829,963   11/829,966   11/829,967   11/829,968   11/829,969       7,156,508   7,159,972   7,083,271   7,165,834   7,080,894   7,201,469   7,090,336       7,156,489   10/760,233   10/760,246   7,083,257   7,258,422   7,255,423   7,219,980       10/760,253   10/760,255   10/760,209   7,118,192   10/760,194   10/760,238   7,077,505       7,198,354   7,077,504   10/760,189   7,198,355   10/760,232   10/760,231   7,152,959       7,213,906   7,178,901   7,222,938   7,108,353   7,104,629   11/446,227   11/454,904       11/472,345   11/474,273   7,261,401   11/474,279   11/482,939   11/482,950   11/499,709       11/592,984   11/601,668   11/603,824   11/601,756   11/601,672   11/650,546   11/653,253       11/706,328   11/706,299   11/706,965   11/737,080   11/737,041   11/778,062   11/778,566       11/782,593   11/246,684   11/246,672   11/246,673   11/246,683   11/246,682   60/939,086       11,860,538   11,860,539   11/860,540   11,860,541   11,860,542   7,246,886   7,128,400       7,108,355   6,991,322   10/728,790   7,118,197   10/728,784   10/728,783   7,077,493       6,962,402   10/728,803   7,147,308   10/728,779   7,118,198   7,168,790   7,172,270       7,229,155   6,830,318   7,195,342   7,175,261   10/773,183   7,108,356   7,118,202       10/773,186   7,134,744   10/773,185   7,134,743   7,182,439   7,210,768   10/773,187       7,134,745   7,156,484   7,118,201   7,111,926   10/773,184   7,018,021   11/060,751       11/060,805   11/188,017   7,128,402   11/298,774   11/329,157   11/490,041   11/501,767       11/499,736   7,246,885   7,229,156   11/505,846   11/505,857   11/505,856   11/524,908       11/524,938   7,258,427   11/524,912   11/592,999   11/592,995   11/603,825   11/649,773       11/650,549   11/653,237   11/706,378   11/706,962   11,749,118   11/754,937   11,749,120       11/744,885   11/779,850   11/765,439   11/842,950   11/839,539   11/097,308   11/097,309       7,246,876   11/097,299   11/097,310   11/097,213   11/210,687   11/097,212   7,147,306       7,261,394   11/764,806   11/782,595   11/482,953   11/482,977   11/544,778   11/544,779       11/764,808   11/756,624   11/756,625   11/756,626   11/756,627   11/756,628   11/756,629       11/756,630   11/756,631   7,156,289   7,178,718   7,225,979   11/712,434   11/084,796       11/084,742   11/084,806   09/575,197   09/575,197   7,079,712   7,079,712   6,825,945       6,825,945   09/575,165   09/575,165   6,813,039   6,813,039   7,190,474   6,987,506       6,987,506   6,824,044   7,038,797   7,038,797   6,980,318   6,980,318   6,816,274       6,816,274   7,102,772   7,102,772   09/575,186   09/575,186   6,681,045   6,681,045       6,678,499   6,679,420   6,963,845   6,976,220   6,728,000   6,728,000   7,110,126       7,173,722   7,173,722   6,976,035   6,813,558   6,766,942   6,965,454   6,995,859       7,088,459   7,088,459   6,720,985   09/609,303   6,922,779   6,978,019   6,847,883       7,131,058   09/721,895   09/607,843   09/693,690   6,959,298   6,973,450   7,150,404       6,965,882   7,233,924   09/575,181   09/575,181   09/722,174   7,175,079   7,162,259       6,718,061   10/291,523   10/291,471   7,012,710   6,825,956   10/291,481   7,222,098       10/291,825   7,263,508   7,031,010   6,972,864   6,862,105   7,009,738   6,989,911       6,982,807   10/291,576   6,829,387   6,714,678   6,644,545   6,609,653   6,651,879       10/291,555   10/291,510   10/291,592   10/291,542   7,044,363   7,004,390   6,867,880       7,034,953   6,987,581   7,216,224   10/291,821   7,162,269   7,162,222   10/291,822       10/291,524   10/291,553   6,850,931   6,865,570   6,847,961   10/685,523   10/685,583       7,162,442   10/685,584   7,159,784   10/804,034   10/793,933   6,889,896   10/831,232       7,174,056   6,996,274   7,162,088   10/943,874   10/943,872   10/944,044   7,259,884       10/944,043   7,167,270   10/943,877   6,986,459   10/954,170   7,181,448   10/981,626       10/981,616   10/981,627   7,231,293   7,174,329   10/992,713   11/006,536   7,200,591       11/020,106   11/020,260   11/020,321   11/020,319   11/026,045   11/059,696   11/051,032       11/059,674   11/107,944   11/107,941   11/082,940   11/082,815   11/082,827   11/082,829       6,991,153   6,991,154   11/124,256   11/123,136   11/154,676   11/159,196   11/182,002       11/202,251   11/202,252   11/202,253   11/203,200   11/202,218   11/206,778   11/203,424       11/222,977   11/228,450   11/227,239   11/286,334   7,225,402   11/329,187   11/349,143       11/491,225   11/491,121   11/442,428   11/454,902   11/442,385   11/478,590   7,271,931       11/520,170   11/603,057   11/706,964   11/739,032   11,739,014   11/834,633   11/830,848       11/830,849   11/839,542   11/866,394   7,068,382   7,068,382   7,007,851   6,957,921       6,457,883   10/743,671   7,044,381   11/203,205   7,094,910   7,091,344   7,122,685       7,038,066   7,099,019   7,062,651   7,062,651   6,789,194   6,789,194   6,789,191       6,789,191   10/900,129   7,278,018   10/913,350   10/982,975   10/983,029   11/331,109       6,644,642   6,644,642   6,502,614   6,502,614   6,622,999   6,622,999   6,669,385       6,669,385   6,827,116   7,011,128   10/949,307   6,549,935   6,549,935   6,987,573       6,987,573   6,727,996   6,727,996   6,591,884   6,591,884   6,439,706   6,439,706       6,760,119   6,760,119   09/575,198   09/575,198   7,064,851   6,826,547   6,290,349       6,290,349   6,428,155   6,428,155   6,785,016   6,785,016   6,831,682   6,741,871       6,927,871   6,980,306   6,965,439   6,840,606   7,036,918   6,977,746   6,970,264       7,068,389   7,093,991   7,190,491   10/901,154   10/932,044   10/962,412   7,177,054       10/962,552   10/965,733   10/965,933   10/974,742   10/982,974   7,180,609   10/986,375       11/107,817   11/148,238   11/149,160   11/206,756   11/250,465   7,202,959   11/653,219       11/706,309   11/730,389   11/730,392   60/953,443   11/866,387   60,974,077   6,982,798       6,870,966   6,870,966   6,822,639   6,822,639   6,474,888   6,627,870   6,724,374       6,788,982   7,263,270   6,788,293   6,946,672   6,737,591   6,737,591   7,091,960       09/693,514   6,792,165   7,105,753   6,795,593   6,980,704   6,768,821   7,132,612       7,041,916   6,797,895   7,015,901   10/782,894   7,148,644   10/778,056   10/778,058       10/778,060   10/778,059   10/778,063   10/778,062   10/778,061   10/778,057   7,096,199       10/917,468   10/917,467   10/917,466   10/917,465   7,218,978   7,245,294   7,277,085       7,187,370   10/917,436   10/943,856   10/919,379   7,019,319   10/943,878   10/943,849       7,043,096   7,148,499   11/144,840   11/155,556   11/155,557   11/193,481   11/193,435       11/193,482   11/193,479   11/255,941   11/281,671   11/298,474   7,245,760   11/488,832       11/495,814   11/495,823   11/495,822   11/495,821   11/495,820   11/653,242   11/754,370       60,911,260   11/829,936   11/839,494   11,866,305   11,866,313   11,866,324   11,866,336       11,866,348   11,866,359   7,055,739   7,055,739   7,233,320   7,233,320   6,830,196       6,830,196   6,832,717   6,832,717   7,182,247   7,120,853   7,082,562   6,843,420       10/291,718   6,789,731   7,057,608   6,766,944   6,766,945   10/291,715   10/291,559       10/291,660   7,264,173   10/409,864   7,108,192   10/537,159   7,111,791   7,077,333       6,983,878   10/786,631   7,134,598   10/893,372   6,929,186   6,994,264   7,017,826       7,014,123   7,134,601   7,150,396   10/971,146   7,017,823   7,025,276   10/990,459       7,080,780   11/074,802   11/442,366   11,749,158   11/842,948   10/492,169   10/492,152       10/492,168   10/492,161   10/492,154   10/502,575   10/531,229   10/683,151   10/531,733       10/683,040   10/510,391   10/510,392   10/778,090   6,957,768   6,957,768   09/575,172       09/575,172   7,170,499   7,170,499   7,106,888   7,106,888   7,123,239   7,123,239       6,982,701   6,982,703   7,227,527   6,786,397   6,947,027   6,975,299   7,139,431       7,048,178   7,118,025   6,839,053   7,015,900   7,010,147   7,133,557   6,914,593       10/291,546   6,938,826   7,278,566   7,123,245   6,992,662   7,190,346   11/074,800       11/074,782   11/074,777   11/075,917   7,221,781   11/102,843   7,213,756   11/188,016       7,180,507   7,263,225   11/442,114   11/737,094   11/753,570   11/782,596   11/865,711       11,856,061   11,856,062   11,856,064   11,856,066   11/672,522   11/672,950   11/672,947       11/672,891   11/672,954   11/672,533   11,754,310   11/754,321   11/754,320   11/754,319       11/754,318   11/754,317   11/754,316   11/754,315   11/754,314   11/754,313   11/754,312       11/754,311   6,593,166   7,132,679   6,940,088   7,119,357   11/513,077   6,755,513       6,974,204   6,409,323   7,055,930   6,281,912   6,893,109   6,604,810   6,824,242       6,318,920   7,210,867   6,488,422   6,655,786   6,457,810   6,485,135   6,796,731       6,904,678   6,641,253   7,125,106   6,786,658   7,097,273   6,824,245   7,222,947       6,918,649   6,860,581   6,929,351   7,063,404   6,969,150   7,004,652   6,871,938       6,905,194   6,846,059   6,997,626   10/974,881   7,029,098   6,966,625   7,114,794       7,207,646   7,077,496   11/071,117   11/072,529   7,152,938   7,182,434   7,182,430       11/102,842   7,032,993   11/155,513   11/155,545   11/144,813   7,172,266   7,258,430       7,128,392   7,210,866   11/488,066   11/505,933   11/540,727   11/635,480   11/707,946       11/706,303   11/709,084   11/730,776   11/744,143   11/779,845   11/782,589   11/863,256       11/066,161   11/066,160   11/066,159   11/066,158   11/066,165   6,804,030   6,807,315       6,771,811   6,683,996   7,271,936   10/934,490   6,965,691   7,058,219   10/943,977       7,187,807   7,181,063   11/338,783   11/603,823   11/650,536   10/727,181   10/727,162       10/727,163   10/727,245   7,121,639   7,165,824   7,152,942   10/727,157   7,181,572       7,096,137   10/727,257   7,278,034   7,188,282   10/727,159   10/727,180   10/727,179       10/727,192   10/727,274   10/727,164   10/727,161   10/727,198   10/727,158   10/754,536       10/754,938   10/727,227   10/727,160   10/934,720   7,171,323   7,278,697   11/442,131       11/474,278   11/488,853   11/488,841   11,749,750   11,749,749   10/296,522   6,795,215       7,070,098   7,154,638   6,805,419   6,859,289   6,977,751   6,398,332   6,394,573       6,622,923   6,747,760   6,921,144   10/884,881   7,092,112   7,192,106   11/039,866       7,173,739   6,986,560   7,008,033   11/148,237   7,222,780   7,270,391   7,150,510       11/478,599   11/499,749   11/521,388   11/738,518   11/482,981   11/743,662   11/743,661       11/743,659   11/743,655   11/743,657   11/752,900   7,195,328   7,182,422   11/650,537       11/712,540   10/854,521   10/854,522   10/854,488   10/854,487   10/854,503   10/854,504       10/854,509   7,188,928   7,093,989   10/854,497   10/854,495   10/854,498   10/854,511       10/854,512   10/854,525   10/854,526   10/854,516   10/854,508   7,252,353   10/854,515       7,267,417   10/854,505   10/854,493   7,275,805   10/854,489   10/854,490   10/854,492       10/854,491   10/854,528   10/854,523   10/854,527   10/854,524   10/854,520   10/854,514       10/854,519   10/854,513   10/854,499   10/854,501   7,266,661   7,243,193   10/854,518       10/854,517   10/934,628   7,163,345   11/499,803   11/601,757   11/706,295   11/735,881       11,748,483   11,749,123   11/766,061   11,775,135   11,772,235   11/778,569   11/829,942       11/014,731   D529081   D541848   D528597   6,924,907   6,712,452   6,416,160       6,238,043   6,958,826   6,812,972   6,553,459   6,967,741   6,956,669   6,903,766       6,804,026   7,259,889   6,975,429   10/636,234   10/636,233   10/636,217   10/636,216       7,274,485   7,139,084   7,173,735   7,068,394   10/636,276   7,086,644   7,250,977       7,146,281   7,023,567   7,136,183   7,083,254   6,796,651   7,061,643   7,057,758       6,894,810   6,995,871   7,085,010   7,092,126   7,123,382   7,061,650   10/853,143       6,986,573   6,974,212   10/943,907   7,173,737   10/954,168   7,246,868   11/065,357       7,137,699   11/107,798   7,148,994   7,077,497   11/176,372   7,248,376   11/225,158       11/225,154   7,173,729   11/442,132   11/478,607   11/503,085   11/545,502   11/583,943       11/585,946   11/653,239   11/653,238   11/764,781   11/764,782   11/779,884   11,845,666       11/544,764   11/544,765   11/544,772   11/544,773   11/544,774   11/544,775   11/544,776       11/544,766   11/544,767   11/544,771   11/544,770   11/544,769   11/544,777   11/544,768       11/544,763   11/293,804   11/293,840   11/293,803   11/293,833   11/293,834   11/293,835       11/293,836   11/293,837   11/293,792   11/293,794   11/293,839   11/293,826   11/293,829       11/293,830   11/293,827   11/293,828   7,270,494   11/293,823   11/293,824   11/293,831       11/293,815   11/293,819   11/293,818   11/293,817   11/293,816   11/838,875   11/482,978       11/640,356   11/640,357   11/640,358   11/640,359   11/640,360   11/640,355   11/679,786       10/760,254   10/760,210   10/760,202   7,201,468   10/760,198   10/760,249   7,234,802       10/760,196   10/760,247   7,156,511   10/760,264   7,258,432   7,097,291   10/760,222       10/760,248   7,083,273   10/760,192   10/760,203   10/760,204   10/760,205   10/760,206       10/760,267   10/760,270   7,198,352   10/760,271   10/760,275   7,201,470   7,121,655       10/760,184   7,232,208   10/760,186   10/760,261   7,083,272   7,261,400   11/474,272       11/474,315   11/501,771   11/583,874   11/650,554   11/706,322   11/706,968   11/749,119       11,749,157   11,779,848   11/782,590   11/855,152   11,855,151   11/014,764   11/014,763       11/014,748   11/014,747   11/014,761   11/014,760   11/014,757   11/014,714   7,249,822       11/014,762   11/014,724   11/014,723   11/014,756   11/014,736   11/014,759   11/014,758       11/014,725   11/014,739   11/014,738   11/014,737   11/014,726   11/014,745   11/014,712       7,270,405   11/014,751   11/014,735   11/014,734   11/014,719   11/014,750   11/014,749       7,249,833   11/758,640   11/775,143   11/838,877   11/014,769   11/014,729   11/014,743       11/014,733   11/014,754   11/014,755   11/014,765   11/014,766   11/014,740   11/014,720       11/014,753   7,255,430   11/014,744   11/014,741   11/014,768   11/014,767   11/014,718       11/014,717   11/014,716   11/014,732   11/014,742   11/097,268   11/097,185   11/097,184       11/778,567   11,852,958   11,852,907   11/293,820   11/293,813   11/293,822   11/293,812       11/293,821   11/293,814   11/293,793   11/293,842   11/293,811   11/293,807   11/293,806       11/293,805   11/293,810   11/688,863   11/688,864   11/688,865   11/688,866   11/688,867       11/688,868   11/688,869   11/688,871   11/688,872   11/688,873   11/741,766   11/482,982       11/482,983   11/482,984   11/495,818   11/495,819   11/677,049   11/677,050   11/677,051       11/014,722   D528156   10/760,180   7,111,935   10/760,213   10/760,219   10/760,237       7,261,482   10/760,220   7,002,664   10/760,252   10/760,265   7,088,420   11/446,233       11/503,083   11/503,081   11/516,487   11/599,312   6,364,451   6,533,390   6,454,378       7,224,478   6,559,969   6,896,362   7,057,760   6,982,799   11/202,107   11/743,672       11,744,126   11/743,673   7,093,494   7,143,652   7,089,797   7,159,467   7,234,357       7,124,643   7,121,145   7,089,790   7,194,901   6,968,744   7,089,798   7,240,560       7,137,302   11/442,177   7,171,855   7,260,995   7,260,993   7,165,460   7,222,538       7,258,019   11/543,047   7,258,020   11/604,324   11/642,520   11/706,305   11/707,056       11,744,211   11/767,526   11/779,846   11/764,227   11/829,943   11/829,944   6,454,482       6,808,330   6,527,365   6,474,773   6,550,997   7,093,923   6,957,923   7,131,724       10/949,288   7,168,867   7,125,098   11/706,966   11/185,722   7,249,901   7,188,930       11/014,728   11/014,727   D536031   D531214   7,237,888   7,168,654   7,201,272       6,991,098   7,217,051   6,944,970   10/760,215   7,108,434   10/760,257   7,210,407       7,186,042   10/760,266   6,920,704   7,217,049   10/760,214   10/760,260   7,147,102       10/760,269   7,249,838   10/760,241   10/962,413   10/962,427   7,261,477   7,225,739       10/962,402   10/962,425   10/962,428   7,191,978   10/962,426   10/962,409   10/962,417       10/962,403   7,163,287   7,258,415   10/962,523   7,258,424   10/962,410   7,195,412       7,207,670   7,270,401   7,220,072   11/474,267   11/544,547   11/585,925   11/593,000       11/706,298   11/706,296   11/706,327   11/730,760   11/730,407   11/730,787   11/735,977       11/736,527   11/753,566   11/754,359   11/778,061   11/765,398   11/778,556   11/829,937       11/780,470   11/866,399   11/223,262   11/223,018   11/223,114   11/223,022   11/223,021       11/223,020   11/223,019   11/014,730   D541849   29/279,123   6,716,666   6,949,217       6,750,083   7,014,451   6,777,259   6,923,524   6,557,978   6,991,207   6,766,998       6,967,354   6,759,723   6,870,259   10/853,270   6,925,875   10/898,214   7,095,109       7,145,696   10/976,081   7,193,482   7,134,739   7,222,939   7,164,501   7,118,186       7,201,523   7,226,159   7,249,839   7,108,343   7,154,626   7,079,292   10/980,184       7,233,421   7,063,408   10/983,082   10/982,804   7,032,996   10/982,834   10/982,833       10/982,817   7,217,046   6,948,870   7,195,336   7,070,257   10/986,813   10/986,785       7,093,922   6,988,789   10/986,788   7,246,871   10/992,748   10/992,747   7,187,468       10/992,828   7,196,814   10/992,754   7,268,911   7,265,869   7,128,384   7,164,505       11/003,595   7,025,434   11/003,481   11/003,485   7,206,098   7,265,877   7,193,743       7,168,777   11/006,734   7,195,329   7,198,346   11/006,739   11/013,363   11/013,881       6,959,983   7,128,386   7,097,104   11/013,636   7,083,261   7,070,258   7,083,275       7,110,139   6,994,419   6,935,725   11/026,046   7,178,892   7,219,429   6,988,784       11/026,135   11/026,326   11/064,005   11/064,006   7,178,903   7,273,274   7,083,256       11/064,008   11/064,009   11/064,013   6,974,206   11/064,004   7,066,588   7,222,940       11/075,918   7,018,025   7,221,867   11/072,517   7,188,938   7,021,742   7,083,262       7,192,119   11/083,021   7,036,912   7,175,256   7,182,441   7,083,258   7,114,796       7,147,302   11/084,757   7,219,982   7,118,195   7,229,153   6,991,318   7,108,346       11/248,429   11/239,031   7,178,899   7,066,579   11/281,419   11/298,633   11/329,188       11/329,140   7,270,397   7,258,425   7,237,874   7,152,961   11/478,592   7,207,658       11/484,744   11/488,867   7,207,659   11/525,857   11/540,569   11/583,869   11/592,985       11/601,762   11/604,316   11/604,309   11/604,303   11/643,844   11/650,553   11/655,940       11/653,320   11/706,294   11/706,381   11/706,323   11/706,963   11/713,660   11/730,408       11/696,186   11/730,390   11/737,139   11/737,749   11/740,273   11,749,122   11/754,361       11,766,043   11/764,775   11/768,872   11/775,156   11/779,271   11/779,272   11/829,938       11/839,502   11,858,852   9,628   5,382   6,485,123   6,425,657   6,488,358       7,021,746   6,712,986   6,981,757   6,505,912   6,439,694   6,364,461   6,378,990       6,425,658   6,488,361   6,814,429   6,471,336   6,457,813   6,540,331   6,454,396       6,464,325   6,443,559   6,435,664   6,412,914   6,488,360   6,550,896   6,439,695       6,447,100   09/900,160   6,488,359   6,637,873   10/485,738   6,618,117   10/485,737       6,803,989   7,234,801   7,044,589   7,163,273   6,416,154   6,547,364   10/485,744       6,644,771   7,152,939   6,565,181   10/485,805   6,857,719   7,255,414   6,702,417       10/485,652   6,918,654   7,070,265   6,616,271   6,652,078   6,503,408   6,607,263       7,111,924   6,623,108   6,698,867   6,488,362   6,625,874   6,921,153   7,198,356       6,536,874   6,425,651   6,435,667   10/509,997   6,527,374   10/510,154   6,582,059       10/510,152   6,513,908   7,246,883   6,540,332   6,547,368   7,070,256   6,508,546       10/510,151   6,679,584   10/510,000   6,857,724   10/509,998   6,652,052   10/509,999       6,672,706   10/510,096   6,688,719   6,712,924   6,588,886   7,077,508   7,207,654       6,935,724   6,927,786   6,988,787   6,899,415   6,672,708   6,644,767   6,874,866       6,830,316   6,994,420   6,954,254   7,086,720   7,240,992   7,267,424   7,128,397       7,084,951   7,156,496   7,066,578   7,101,023   11/165,027   11/202,235   11/225,157       7,159,965   7,255,424   11/349,519   7,137,686   7,201,472   11/442,413   11/504,602       7,216,957   11/520,572   11/583,858   11/583,895   11/585,976   11/635,488   11/653,314       11/706,952   11/706,307   11/785,109   11/740,287   11/754,367   11/758,643   11/778,572       11,859,791   11/863,260   6,916,082   6,786,570   10/753,478   6,848,780   6,966,633       7,179,395   6,969,153   6,979,075   7,132,056   6,832,828   6,860,590   6,905,620       6,786,574   6,824,252   7,097,282   6,997,545   6,971,734   6,918,652   6,978,990       6,863,105   10/780,624   7,194,629   10/791,792   6,890,059   6,988,785   6,830,315       7,246,881   7,125,102   7,028,474   7,066,575   6,986,202   7,044,584   7,210,762       7,032,992   7,140,720   7,207,656   11/031,084   11/048,748   7,008,041   7,011,390       7,048,868   7,014,785   7,131,717   11/148,236   11/176,158   7,182,436   7,104,631       7,240,993   11/206,920   11/202,217   7,172,265   11/231,876   7,066,573   11/298,635       7,152,949   11/442,161   11/442,133   11/442,126   7,156,492   11/478,588   11/505,848       11/520,569   11/525,861   11/583,939   11/545,504   11/583,894   11/635,485   11/730,391       11/730,788   11/749,148   11/749,149   11/749,152   11/749,151   11/759,886   11/865,668       6,824,257   7,270,475   6,971,811   6,878,564   6,921,145   6,890,052   7,021,747       6,929,345   6,811,242   6,916,087   6,905,195   6,899,416   6,883,906   6,955,428       10/882,775   6,932,459   6,962,410   7,033,008   6,962,409   7,013,641   7,204,580       7,032,997   6,998,278   7,004,563   6,910,755   6,969,142   6,938,994   7,188,935       10/959,049   7,134,740   6,997,537   7,004,567   6,916,091   7,077,588   6,918,707       6,923,583   6,953,295   6,921,221   7,001,008   7,168,167   7,210,759   11/008,115       11/011,120   11/012,329   6,988,790   7,192,120   7,168,789   7,004,577   7,052,120       11/123,007   6,994,426   7,258,418   7,014,298   11/124,348   11/177,394   7,152,955       7,097,292   7,207,657   7,152,944   7,147,303   11/209,712   7,134,608   7,264,333       7,093,921   7,077,590   7,147,297   11/239,029   11/248,832   11/248,428   11/248,434       7,077,507   7,172,672   7,175,776   7,086,717   7,101,020   11/329,155   7,201,466       11/330,057   7,152,967   7,182,431   7,210,666   7,252,367   11/450,586   11/485,255       11/525,860   6,945,630   7,018,294   6,910,014   6,659,447   6,648,321   7,082,980       6,672,584   7,073,551   6,830,395   10/309,025   7,001,011   6,880,922   6,886,915       6,644,787   6,641,255   7,066,580   6,652,082   10/309,036   6,666,544   6,666,543       6,669,332   6,984,023   6,733,104   6,644,793   6,723,575   6,953,235   6,663,225       7,076,872   7,059,706   7,185,971   7,090,335   6,854,827   6,793,974   10/636,258       7,222,929   6,739,701   7,073,881   7,155,823   7,219,427   7,008,503   6,783,216       6,883,890   6,857,726   10/636,274   6,641,256   6,808,253   6,827,428   6,802,587       6,997,534   6,959,982   6,959,981   6,886,917   6,969,473   6,827,425   7,007,859       6,802,594   6,792,754   6,860,107   6,786,043   6,863,378   7,052,114   7,001,007       10/729,151   10/729,157   6,948,794   6,805,435   6,733,116   10/683,006   7,008,046       6,880,918   7,066,574   6,983,595   6,923,527   7,275,800   7,163,276   7,156,495       6,976,751   6,994,430   7,014,296   7,059,704   7,160,743   7,175,775   11/058,238       7,097,283   7,140,722   11/123,009   11/123,008   7,080,893   7,093,920   7,270,492       7,128,093   7,052,113   7,055,934   11/155,627   11/149,324   11/159,197   7,083,263       7,145,592   7,025,436   11/281,444   7,258,421   11/478,591   11/478,735   7,226,147       11/482,940   7,195,339   11/503,061   11/505,938   11/520,577   11/525,863   11/544,577       11/540,576   11/585,964   11/592,991   11/599,342   11/600,803   11/604,321   11/604,302       11/635,535   11/635,486   11/643,842   11/655,987   11/650,541   11/706,301   11/707,039       11/730,388   11/730,786   11/730,785   11/739,080   11/764,746   11/768,875   11/779,847       11/829,940   11,847,240   11/834,625   11/863,210   11/865,680   7,067,067   6,776,476       6,880,914   7,086,709   6,783,217   7,147,791   6,929,352   7,144,095   6,820,974       6,918,647   6,984,016   7,192,125   6,824,251   6,834,939   6,840,600   6,786,573       7,144,519   6,799,835   6,959,975   6,959,974   7,021,740   6,935,718   6,938,983       6,938,991   7,226,145   7,140,719   6,988,788   7,022,250   6,929,350   7,011,393       7,004,566   7,175,097   6,948,799   7,143,944   10/965,737   7,029,100   6,957,811       7,073,724   7,055,933   7,077,490   7,055,940   10/991,402   7,234,645   7,032,999       7,066,576   7,229,150   7,086,728   7,246,879   11/144,809   7,140,718   11/144,802       7,144,098   7,044,577   11/144,808   11/172,896   7,189,334   7,055,935   7,152,860       11/203,188   11/203,173   11/202,343   7,213,989   11/225,156   11/225,173   11/228,433       7,114,868   7,168,796   7,159,967   11/272,425   7,152,805   11/298,530   11/330,061       7,133,799   11/330,054   11/329,284   7,152,956   7,128,399   7,147,305   11/446,241       11/442,160   7,246,884   7,152,960   11/442,125   11/454,901   11/442,134   11/450,441       11/474,274   11/499,741   7,270,399   6,857,728   6,857,729   6,857,730   6,989,292       7,126,216   6,977,189   6,982,189   7,173,332   7,026,176   6,979,599   6,812,062       6,886,751   10/804,057   10/804,036   7,001,793   6,866,369   6,946,743   10/804,048       6,886,918   7,059,720   10/846,561   10/846,562   10/846,647   10/846,649   10/846,627       6,951,390   6,981,765   6,789,881   6,802,592   7,029,097   6,799,836   7,048,352       7,182,267   7,025,279   6,857,571   6,817,539   6,830,198   6,992,791   7,038,809       6,980,323   7,148,992   7,139,091   6,947,173   7,101,034   6,969,144   6,942,319       6,827,427   6,984,021   6,984,022   6,869,167   6,918,542   7,007,852   6,899,420       6,918,665   6,997,625   6,988,840   6,984,080   6,845,978   6,848,687   6,840,512       6,863,365   7,204,582   6,921,150   7,128,396   6,913,347   7,008,819   6,935,736       6,991,317   11/033,122   7,055,947   7,093,928   7,100,834   7,270,396   7,187,086       11/072,518   7,032,825   7,086,721   11/171,428   7,159,968   7,010,456   7,147,307       7,111,925   11/144,812   7,229,154   11/505,849   11/520,570   11/520,575   11/546,437       11/540,575   11/583,937   11/584,619   11/592,211   11/592,207   11/635,489   11/604,319       11/635,490   11/635,525   11/650,540   11/706,366   11/706,310   11/706,308   11/785,108       11/744,214   11,744,218   11,748,485   11,748,490   11/764,778   11/766,025   11/834,635       11/839,541   11/860,420   11/865,693   11/863,118   11/866,307   11/866,340   11/869,684       11/869,722   11/869,694   11/872,714                    
The disclosures of these applications and patents are incorporated herein by reference.
 
     BACKGROUND OF THE INVENTION 
     Inkjet printing is a popular and versatile form of print imaging. The Assignee has developed printers that eject ink through MEMS printhead IC&#39;s. These printhead IC&#39;s (integrated circuits) are formed using lithographic etching and deposition techniques used for semiconductor fabrication. 
     The micro-scale nozzle structures in MEMS printhead IC&#39;s allow a high nozzle density (nozzles per unit of IC surface area), high print resolutions, low power consumption, self cooling operation and therefore high print speeds. Such printheads are described in detail in U.S. Ser. No. 10/160,273 filed Jun. 4, 2002 and U.S. Ser. No. 10/728,804 filed on Dec. 8, 2003 to the present Assignee. The disclosures of these documents are incorporated herein by reference. 
     The small nozzle structures and high nozzle densities can create difficulties with color mixing between nozzles of different color. During periods of prolonged inactivity (or ‘standby mode’) the separate fluidic lines for each ink color can undergo slight pressure changes relative to each other. Different rates of heating and outgassing in different ink lines will generate a slight pressure differential. If paper dust or ink residue on the nozzle face extends between nozzles of the different ink lines, the dust or residual ink can forge a fluid connection between the two ink lines. The ink lines try to equalize the pressure difference between them and this drives an ink from the higher pressure line to the lower pressure line. If left unchecked, the ink contamination in the lower pressure ink line can extend to the ink tank. In this case, the contaminated ink supply is irretrievable and needs replacement before the ink lines are flushed through to the nozzles. 
     The ink tanks can be isolated from the printhead by a shut off valve upstream of the printhead. This protects the tanks from contamination during standby, but there is a risk that the tank and the printhead will generate a pressure difference during the standby period. If this happens, the sudden pressure equalization causes a pulse through the ink line which floods the nozzle plate. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention provides an inkjet printer comprising: 
     a printhead for printing onto a media substrate; 
     a reservoir for containing a quantity of ink, the reservoir having a lower portion for holding ink and an upper portion defining a headspace of air above the ink; 
     a fluid connection extending between the printhead and the reservoir; and, 
     a pump for drawing air from the headspace into atmosphere. 
     The invention uses a fluidic system that controls the air pressure in the headspace of an ink reservoir to control the hydrostatic pressure of the ink at the key points along the ink line. Controlling the ink pressure in one of the ink reservoirs (either the ink tank supplying the printhead or the ink sump collecting waste ink) can maintain a more consistent negative pressure (i.e. a hydroststatic pressure less than atmospheric) at the printhead nozzles. The negative pressure at the printhead nozzles prevents, or at least reduces color mixing by ensuring that the ink meniscus at each nozzle is drawn inwards. An inwardly drawn meniscus significantly reduces the chance that paper dust or residual ink can establish a fluid connection between nozzles of different color. Drawing air from the headspace in the sump helps to equalize the pressure in the different ink lines as the sump headspace is common to all the color channels. By the same token, it is a simple matter to use a single pump to connect the respective headspaces for each ink tank. In this way, the air pressure in each ink tank is equal and so the hydrostatic pressure of the ink at the nozzles will only vary by the variations in the ink levels of the ink tanks. In a normal usage profile, the ink levels remain roughly the same for each ink tank. To further minimize variations, the tanks can have a wide and squat shape to reduce the change in hydrostatic pressure from full to empty. With equal pressures (or at least very nearly equal pressures) in each ink line, there is no pressure differential to drive a color mixing process other than diffusion. As the fluid connection across the nozzle is so small, mixing by diffusion is negligible. 
     Preferably, the reservoir is a sump that collects waste ink drained from the printhead. 
     Preferably, the reservoir is an ink tank for supplying ink to the printhead. In a further preferred form, the printer is a color printer for printing a plurality of differently colored inks, each of the differently colored inks being stored in a respective ink tank for supplying the printhead, the headspace of each of the tanks is connected to the pump such that they are in fluid communication with each other. 
     Preferably, the reservoir has a vent for venting the headspace to atmosphere, and for allowing a throttled flow of air into the headspace as the pump is drawing air out of the headspace. In a further preferred form, the vent has a filter for removing particulate contaminants from the throttled air flow into the headspace. 
     Preferably, the printing further comprises an upstream valve positioned upstream of the printhead. In a further preferred form, the printer further comprises a downstream valve positioned downstream of the printhead. 
     Preferably, the pump is reversible such that it can increase the air pressure in the headspace and force ink towards the printhead. In a further preferred form, the pump is used to prime the printhead. In another preferred form, the pump is used to purge ink from the nozzles and flood the printhead. 
     Preferably, the printhead has a distribution manifold and a plurality of printhead integrated circuits mounted to the distribution manifold such that priming the distribution manifold with ink also primes the printhead integrated circuits. In some embodiments, the printer further comprises a maintenance station having a capper and blotter for the printhead integrated circuits. In specific embodiments, the pump is in fluid communication with the maintenance station and the sump such that ink collected by the maintenance station can be transferred to the sump by running the pump in one direction and air drawn from the headspace by running the pump in the other direction. In a particularly preferred form, the printhead is provided as a user removable and replaceable cartridge which is fluidly detachable from the printer via the upstream and the downstream valves. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Preferred embodiments of the invention will now be described by way of example only, with reference to the accompanying drawings in which: 
         FIG. 1  shows a schematic diagram of a printer fluidic system according to the present invention; and, 
         FIG. 2  shows a schematic diagram of another printer fluidic system according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIG. 1 , the printer fluidics system is shown schematically for the purposes of illustration. A single ink line for one color is shown in full. The ink tanks  10  and  12  for other color are shown in dotted line. A color printer would have complete ink lines for each ink color. Most of the individual components within the system are shown and described in much greater detail in the Applicant&#39;s co-pending application U.S. Ser. No. 11/688,863, filed on Mar. 21, 2007, the contents of which are incorporated herein by cross reference. Components of the present system that are not shown in the cross referenced document, are commercially available. 
     The fluidic system shown in  FIG. 1  has a printhead  2  supplied with ink  14  from an ink tank  8  via an upstream ink line  20 . Waste ink from the printhead  2  drains to a sump  28  through downstream ink line  24 . The upstream ink line  20  has a shut off valve  18  and the downstream ink line has shut off valve  26 . These valves can be used for priming and purging ink (discussed below) and as detachable fluid connections is the printhead is provided in the form of user removable and replaceable cartridge such as that shown in the above referenced U.S. Ser. No. 11/688,863, filed on Mar. 21, 2007. 
     The printhead has a maintenance station  22  for capping and blotting the nozzles. A drain line  16  connects the maintenance station  22  to the sump  28 . 
     The printhead  2  is an assembly of an ink distribution manifold  4  on which a series of printhead integrated circuits (ICs)  6  are mounted. The printhead ICs  6  define the nozzle arrays which eject the ink to the media substrate. The nozzles are MEMS devices which can be thermally actuated such as those described in U.S. Ser. No. 11/482,953 filed on Jul. 10, 2006 or mechanically actuated such as those disclosed in U.S. Ser. No. 10/160,273 filed Jun. 4, 2002. 
     The ink distribution manifold  4  is an LCP molding with a system of large channels feeding a network of smaller channels to supply the ink to many points along the length of each printhead IC  6 . An embodiment of the distribution manifold  4  and the printhead ICs  6  is disclosed in detail in the U.S. Ser. No. 11/688,863 filed Mar. 21, 2007 reference listed above. This document also details the manner in which the printhead is primed with ink or, if necessary, purged of ink to correct any cross channel color contamination and/or bubble removal. 
     In standby mode, the air pump  30  draws air from the headspace  32  in the tank  8 . The air pressure in the headspace drops and air is drawn back into the headspace  32  through the filtered vent  40 . The air constriction from the vent  40  is carefully controlled to create a predetermined negative air pressure. The tubing  38  fluidly connects the headspaces  34  and  36  in tanks  10  and  12  such that all the headspaces are at the same air pressure. Tanks  10  and  12  can have their own vents to atmosphere (not shown) but the system will operate with a single vent. 
     With the headspaces  32 ,  34 , and  36  at the same pressure, the hydrostatic pressure in the ink is very early equal. The hydrostatic pressure of the ink at the nozzles will only vary by the variations in the ink levels of the ink tanks. Normal usage is designed to keep the ink levels roughly the same in each ink tank. To further minimize variations, the tanks can have a wide and squat shape to reduce the change in hydrostatic pressure from full to empty. With equal pressures (or at least very nearly equal pressures) in each ink line, there is no pressure differential to drive a color mixing process other than diffusion. As the fluid connection across the nozzle is so small, mixing by diffusion is negligible. 
     The pump  30  is reversible so it can be used to pressurize the headspaces  32 ,  34  and  36  in order to prime the printhead  2  or purge ink through the printhead ICs  6 . Priming requires the upstream and downstream shut off valves  18  and  26  to be open. Ink from the tanks  8 ,  10  and  12  is forced down the upstream ink line  20 , through the distribution manifold  4  and into the sump  28  via the downstream ink line  24 . The printhead ICs  6  prime by capillary action from the ink in the distribution manifold. 
     To purge the printhead ICs  6  (to recover dried nozzles, outgassing bubble blockages etc) the down stream valve  26  is closed as the pump  30  pressurizes the headspace  32 . Ink is forced from the nozzles and the resulting flood on the nozzle plate is cleared with the maintenance station  22 . 
     It will be appreciated that the pump  30  operates during a power up standby mode. That is, during periods of inactivity between print jobs, but the printer is still plugged in and connected to a power supply. During a power off standby, the shut off valve  18  and  26  are closed to isolate the printhead and prevent mixing. When the printer powers up again, the pump  30  can be used to ready the printhead by priming or purging (if necessary) as discussed above. 
       FIG. 2  shows the pump  30  operating on the headspace  32  of the sump  28  instead of the ink tank  8 . Again, a single ink line is shown but the color printer will have several color lines all draining to the same sump  28 . As long as all the down stream ink lines  24  for each color connect to the sump headspace, a single pump can be used to change the hydrostatic pressures in the ink at the nozzles. 
     With the pump  30  connected to the sump  28 , the upstream shut off valve  18  is closed during power down standby. The negative air pressure in the headspace  32  draws on the column of ink hanging from the printhead  2 . This ensures that a sufficiently negative pressure is maintained at the nozzles. More importantly, the negative pressure in the nozzles of each color is the same. As discussed above, this removes the mechanism that drives the color mixing process. 
     The pump  30  is marginally more complex in that it needs to be able to handle an ink/air mixture. It is in the drain line  16  from the maintenance assembly  22  to the sump  28  to assist the transfer of blotted ink to the sump  28  but needs to be able to draw air from the headspace  32  or from atmosphere through the filter  42 . 
     In this embodiment, priming requires the upstream valve  18  to be open and the pump  30  to create a low pressure in the sump  28  to draw the ink from the tank  8  down the upstream ink line  20 , through the distribution manifold  4  and into the downstream ink line  24 . Again the printhead ICs  6  prime by capillarity. 
     To purge, the upstream valve  18  is closed and the pump  30  creates a positive pressure in the headspace  32  to force the ink in the down stream ink line  24  and the distribution manifold  4  to flood the printhead ICs  6 . 
     The invention has been described by way of example only. Ordinary workers in this field will readily recognize any variations and modifications which do not depart from the spirit and scope of the broad inventive concept.