 Such suction feeders are designed to hold the bottom blank against the support table. The reciprocating feed bar then engages the trailing edge of the bottom blank and moves it through the opening in the gate and into the processing apparatus. These suction feeders utilize the reciprocating feed bar to move the bottom blank through the gate mechanism and as previously explained were developed to eliminate the problem of feeding warped blanks which prevent them from passing through the opening in the gate mechanism. These suction feeders generally do their job very well. The suction chamber pulls the warped botttom blank against the support table and the suction pressure is strong enough to flatten the warped blank and allow the feeder bar to engage the trailing edge of the blank and move it through the gap in the gate mechanism.
Although the reciprocating feed bar type suction feeder has the above mentioned advantage, it does have a number of disadvantages. First, the suction pressure in the suction chamber must be continuously applied so that the warped blank will stay flat during movement through the opening in the gate mechanism. This continuous suction pressure creates friction between the blank and support table which the feeder bar must overcome to advance the blank. The feeder bar pushes against the trailing edge of the blank and tends to bend or deform the trailing edge thus damaging the product.
Another disadvantage of the reciprocating feed bar type feeder whether used singularly or in combination with the stationery suction chamber is that the feeder bar reciprocates rapidly in the area where the machine operator stands at the rear of the stack. As he loads the stack onto the support table, his hands are in close proximity to the feeder bar. Should the operator be careless or make a mistake, his hands may contact the moving feeder bar and injure his hands.
A second type of suction feeder is shown in E. L. Bishop U.S. Pat. No. 2,331,533 and T. D. Bishop U.S. Pat. No. 3,226,108, which is an improvement over the E. L. Bishop patent. In this type of suction feeder the suction box itself reciprocates along the plane of the feed table eliminating the need for a feeder bar and consequently the disadvantages associated with the feeder bar. Suction in the box draws the bottom blanks downward into flat contact with the top of the suction box. The suction box moves the blanks forward until its leading edges are gripped by a pair of pull rollers beyond the gate which pull the blank into the processing machinery. When the pull rolls grip the blank the
Such suction feeders are designed to hold the bottomland blank against the documentation table. The reciprocating feed bar then absorb the trailing edge of the buttocks blank and moves it through the opening in the gate and into the processing apparatus. These sucking feeder utilize the reciprocate feed bar to move the bed blank through the gate mechanism and as previously excuse were developed to eliminate the problem of feeding warped space which prevent them from passing through the opening in the gate mechanism. These suction self-feeder generally do their job very well. The suction bedroom pulls the warped botttom blank against the accompaniment table and the suction pressure is potent enough to flatten the warped blank and allow the feeder bar to engage the trailing boundary of the blank and travel it through the gap in the gate mechanism. 
 Although the reciprocating feed bar type suction feeder has the above mentioned advantage, it does have a act of disadvantages. First, the sucking atmospheric pressure in the sucking chamber must be continuously applied so that the warped blank will stay flat during movement through the opening in the gate mechanism. This continuous sucking pressure creates friction between the blank and support table which the feeder bar must overcome to advance the blank. The feeder bar push against the trail edge of the blank and tends to bend or deform the trail edge thus damaging the product. 
 Another disadvantage of the reciprocating feed bar type feeder whether use singularly or in combination with the stationery suction bedroom is that the feeder bar reciprocates rapidly in the area where the car operator stands at the rear of the stack. As he load the stack onto the support board, his hands are in near proximity to the feeder measure. Should the operator be careless or make a mistake, his hands may contact the travel feeder bar and hurt his hands. 
 A second type of sucking feeder is shown in E. L. Bishop U.S. Pat. No. 2,331,533 and T. D. Bishop U.S. Pat. No. 3,226,108, which is an improvement over the E. L. Bishop patent. In this type of suction feeder the suction box itself reciprocates along the plane of the feed mesa eliminate the motivation for a feeder bar and consequently the disadvantages associated with the feeder bar. sucking in the box draws the bottom blanks downward into flat contact with the top of the suction box. The suction corner moves the blanks forward until its leading edges are gripped by a pair of pull roller beyond the gate which pull the blank into the processing machinery. When the pull rolls grip the blank the
 Sufh suction feeders are dtsigned to hold tkw bottmm blahk againrt the support table. The recmproxatint feed bar then engager the trapling edgw of rhe bottom blank akb movsd it vhrough the opeking in the gate and into tfe processing apparatus. These suction feederx ktilize the resiprpsatihg feed bar to move the bottom blahk throlgh the gate mechsnism and as previously exolaijed were developed to eliminajs trw problem of feeding warped blanks which prevent them from passine thrpugh the okzbinh in the gatx mechwnism. These suction xeeders generally do bheir jov very well. The suctimn chamber pulls tre warped bktttom blank agaibsr the sup[ort rabue znv tge suchioi pressure js strong ebough to flatten tht wwgled blank ans allor ehe feeder bar to engage the trailing egge of the blank and move ut through the gap in the gate mechanism.
Although the reciprocating feed bar typa sucviun yccder yad the above mentioned advantage, it does have w nimner of disadvantcges. First, the sichipg pressure in the sbdtjon chamber must bf contiguousoy applieq so that the warped blank will stay flat dlrint movement through the openiny in tne gaye mechanism. This contiuuous auction predsure crezges friction betdeek tve blank and support table which thx feeber bar oust overcjme to advwnce bve blank. The feedeg bar pgshes agaijst the trailing edge of the bleik and tends jo teng or defjrm tme trailing edgq thus damaginy the prjduct.
Xnother diaadvantege of the rqciprocating xged bar type heeder whqthee uswd singjuarly or in cokbination with the wtationery suction chxjber is that thz deeder bar recilrozatqs repidlr in the area whefe gne mazhine okzrabor stamds at the rear of tve sfack. As he loads tne stack obto the fupport table, his hands are in flose pruximiyy jo the feeder bar. Should the opsrator be caveless or makq a nistake, his kands may contact the moving feeder bar end injure his hands.
A swcond type of suctipk feeder is xhown in E. L. Bhshop U.S. Pat. No. 2,331,533 and T. D. Bishop U.S. Pau. No. 3,226,108, which is an improbement over the E. L. Bishop patent. In this type of suction feeder the suction box itswlf reri[rocates alkng yhe pnaue pf the feev vable eliminating the need for a feeder bar and ronsequentny the disadvantages associatec dith the feedgr bar. Suction in the box sraws thr bottom blanks downward into fkat contact with the top of the wuctikn box. The suction box moves the bnanks forware unbil its leadine ecgcs are grioped bv a pair of pull rollers beyond tye gatw ahich pull the bnank into tme procgssing mwchinery. When ths pump rolus grip the bkank the
Such suction feeders are designed to hold blank the support The reciprocating feed edge the bottom blank moves it through opening in the gate and into processing apparatus. These suction feeders utilize the reciprocating feed bar to move the blank through the gate mechanism and as previously explained were developed to eliminate problem feeding blanks prevent them from passing through the opening in the gate mechanism. These suction feeders generally do job very well. The suction chamber pulls the botttom blank against the table and the suction pressure strong to flatten warped and the feeder bar engage the trailing edge of the blank and move it through the gap in the gate mechanism. the reciprocating type suction has above advantage, it does number of disadvantages. First, the suction suction chamber must be continuously applied so that warped blank stay flat during movement through the in the gate mechanism. This continuous suction pressure friction between the blank and support table which the feeder bar must overcome to advance The feeder bar pushes the trailing edge the and to or deform trailing edge thus damaging the product. Another disadvantage of the reciprocating bar type feeder whether used singularly or in combination with suction is that the bar reciprocates rapidly in area the machine operator stands rear the loads stack the support table, his are in close proximity to feeder bar. Should the a mistake, his hands may contact the moving bar and injure his hands. A second of suction feeder is shown in E. L. Bishop U.S. Pat. No. and T. U.S. Pat. No. 3,226,108, which is an improvement the E. L. Bishop In this type of suction feeder the suction box reciprocates the plane the feed table the need for feeder bar and disadvantages associated the bar. box draws the bottom blanks downward flat with the top of the box. box moves the blanks forward until its leading edges are gripped by a pair of beyond the gate which the into the processing machinery. When the pull rolls grip the blank the
 Such suction feeders are desiGned to hold The boTtoM blAnK agaInst The support tablE. the rEciprocating feed bar theN engaGeS The tRAiLing eDge of thE BoTTOm bLaNk And MoVEs It thrOugH the opeNing in the gAte AnD into the procESsIng apparatUs. THese suction fEedErs utiLiZe tHE reciProCatinG feed bAR to movE the bottoM bLAnk thrOUgh the gATE mEchaNism and as previousLY eXPlained were devEloped To ELiMINatE thE problem of FeEding WArped blANkS WHIch PRevent them froM passing thrOUgh The opeNiNg iN The gatE mechAnISm. THese suction FeedErs generaLly do tHEir job vERy well. THe suctIon ChaMber PUlLs The WaRPed BOtTtoM BlaNk againsT tHe SuppoRt taBLE ANd thE suCtioN presSure is strong eNouGh to FLatTen thE warpEd blAnK and aLlow thE feedEr Bar to engage the tRailIng edge of The BlAnk AnD move IT throuGh tHe gAp in the Gate mecHAniSm.
aLTHoUgh the reciprocatinG fEED bAr type suCtion fEEdEr HAs the aboVe MenTionED AdvanTage, IT dOes have a Number OF dIsAdvantaGeS. First, ThE suCtiOn preSSure In the sUction chAmber MUst be continuouSLy applied so thAT tHE WaRPed bLanK will stay flAt duRIng mOvemENt ThrOUgh thE openInG In THe gate mechanism. This CoNtinuoUs sucTion pressure cReates fricTION between The bLAnK And support tablE whicH the feeder BAr must ovErcomE to advanCe the blanK. tHe feeder Bar PusHes AgaINSt The trailing edGE Of thE bLank and TenDs to benD or DefOrm The TrAiling edgE thus damAgInG tHe ProDuct.
ANOther disAdVanTaGe oF the rECiprocAting Feed BaR tYPe fEeder whEThER Used SiNgUlarLy oR iN combInatIOn wIth the sTationery SucTIon cHaMbEr is thaT the feeder bar ReCiprocates RaPidLy in thE ARea where The machine operator standS At the reAr oF the sTack. as he loads The Stack oNto THe suppOrt tabLe, his HaNds ARE in clOSE pRoxImIty to the feEDEr bAr. ShoUlD the OperatoR be careless or make a MIstAke, his hands maY coNtacT THe MovINg FEedEr BAr aND Injure his hands.
A Second type Of SUcTion feeder IS shOwN in E. L. BiShop U.S. PAt. No. 2,331,533 aND T. D. BishOp U.S. Pat. No. 3,226,108, Which is an ImProvEMEnt Over the E. L. BIshop patEnt. In this TYpe of SUcTion fEedEr the sUcTioN box iTself rECipRocatEs alonG tHe planE of thE fEed table Eliminating the need for a fEeder bAr and ConSequently The DIsaDvantages AssoCiated with The FeeDer baR. SuCTion iN the BOx DraWS the bOttoM Blanks dowNWaRd iNTO fLat contact wITH The Top of The SUction Box. THe suction box moves THe blanks forwarD untIL Its LeaDIng eDgEs are gripped by A paIr OF Pull rollErS beyond the gAte which PuLL the bLank inTo the pRocessiNG MaCHinery. when The Pull rolls GriP tHE blank tHe
 Such suction feeders aredesigned t o hol d t hebo ttom  bla nk against the supp ort table. The recipro catin gf eedb ar  then  engage s  t h e  tr ai li nged g eof th e b ottom b lank and m ove sit through t h eopening in  th e gate and i nto  the p ro ces s ing a ppa ratus . Thes e  sucti on feeder su tilize the rec i p ro cati ng feed bar to mo v et he bottom blan k thro ug h  t h e  ga temechanisman d asp revious l ye x p lai n ed were devel oped to eli m ina te the  p rob l em offeedi ng war ped blankswhic h prevent  themf rom pas s ing thr ough t heope ning in  t hega t e m e ch ani s m.These su ct io n fee ders g e n eral lydo t heirjob very well . T he s u cti on ch amber  pul ls  thewarped  bott to m blank against  the  supporttab le  an dthe s u ctionpre ssu re is s trong e n oug ht o fl atten the warped b la n k  a nd allow  the f e ed er bar to e ng age  the t raili ng e d ge  of theblanka nd  m ove itth roughth e g apin th e  gat e mech anism.
A lthou g h the reciproc a ting feed bar ty p e  s u ctio n f eeder has t he a b ovement i on eda dvant age,it do e s have a number ofdi sadvan tages . First, thesuction pr e s s ure in t he s u ct i on chamber mus t becontinuous l y applie d sothat the  warped b l a nk willsta y f lat  du r i ng  movement thr o u gh t he  openin g i n the g ate  me cha nis m.  This con tinuoussu ct io npre ssure createsfr ict io n b etwee n  the b lankandsu pp o rttable w h ic h thefe ed er b armu st ov erco m e t o advan ce the bl ank .  The  f ee der bar  pushes again st  the trail in g e dge of t he blank  and tends to bend or d e form th e t raili ng e dge thusdam agingthe produc t.
Ano therdi sad v a ntage o fthe  r eciprocati n g  fe ed ba rtype  feeder  whether used sing u lar ly or in comb ina tion w it h t h es tat io n ery s uction chamberis that th ef ee der bar re c ipr oc ates ra pidly i n the area wh ere the m achine op er ator s tan ds at therear ofthe stack .  As h e  l oadsthe  stack  o nto  thesuppor t  ta ble,his ha nd s arein cl os e proxim ity to the feeder bar.Should  theope rator becar e les s or make  a m istake, hi s h and s may  co n tactthem ov ing feede r ba r  and inju r ehis h an ds.
A secon d t ype  of s uct i on fee deris shown in E. L. Bishop U.S. Pa t. N o .  2, 331 , 533an d T. D. Bishop  U. S. P at. No.3, 226,108, wh ich is a ni mprov ementover t he E. L . Bi s hop pa tent . I n this ty peof suction  f ee d er the  suc ti on box  itsel f  rec i p rocates along th e pla n e  of t h e f eed t ab le elim i nati ng the nee d for a fee der ba r an d con sequent ly  the d isa dv antages as s ociated w ith t he feed er  bar . S uction  int h e box  dra ws  th e bottomb l an k sdo w nwa rd i nto f la t co ntact wit h  the top  of the suc ti onb o x. The su c t ion box mo ves  theb l anks forwa r d un t il its l eading  edges  are gr i ppe dby a pa iro f  pull rol lers beyo n d t he  gat e whichpu ll t he  bl an k into the proc essing m achinery . When t hep ullr olls g ri p the blankthe
 Such_suction feeders_are designed to hold_the bottom_blank_against the_support_table. The reciprocating_feed bar then_engages the trailing edge_of the bottom_blank_and moves it through the opening in the gate and into the processing apparatus._These_suction feeders_utilize_the_reciprocating feed bar to move_the bottom blank through the_gate mechanism_and as previously explained were developed to eliminate_the_problem of feeding_warped blanks which prevent them from passing through the_opening in the gate mechanism. These_suction feeders generally_do_their_job very well. The_suction chamber pulls the warped botttom_blank against the support table and_the suction pressure is strong enough to_flatten the warped blank and allow_the feeder bar to engage_the trailing_edge of the blank and_move it through_the gap_in the gate_mechanism.
Although the reciprocating feed bar type_suction feeder has_the above mentioned advantage, it does_have_a number of_disadvantages._First,_the suction_pressure in the_suction_chamber must_be_continuously applied so that the warped_blank_will stay flat during movement through the_opening in the gate_mechanism._This continuous suction pressure_creates friction between the blank_and support table which the feeder_bar must_overcome to_advance the blank. The feeder bar pushes against the trailing edge_of the blank and tends to_bend or deform the_trailing edge_thus_damaging the product.
Another_disadvantage_of the_reciprocating feed bar type feeder whether used_singularly or_in combination with the stationery suction_chamber is that the_feeder_bar reciprocates rapidly in the area_where the machine operator stands at_the rear of the stack._As_he_loads the stack onto the_support table, his hands are in_close proximity to_the feeder bar. Should the operator be_careless_or make a mistake, his hands_may_contact the moving feeder bar and_injure_his_hands.
A second type of suction_feeder is shown in E. L._Bishop U.S. Pat. No. 2,331,533 and T. D. Bishop_U.S. Pat. No._3,226,108, which is an improvement_over_the_E. L. Bishop patent. In this type of suction feeder_the suction_box itself reciprocates_along the plane of the feed table eliminating the need_for a feeder bar and consequently the_disadvantages associated with the feeder bar. Suction in the box draws_the bottom blanks downward into flat contact with_the top of the suction box. The_suction box moves the_blanks_forward until its leading edges are gripped_by_a_pair_of pull rollers_beyond the gate_which pull the_blank into_the processing machinery._When the_pull rolls grip_the_blank the