Separating articles from piles

BPERFORMING OPERATIONS TRANSPORTING B65Thin material handling B65HHANDLING THIN OR FILAMENTARY MATERIAL

B65H3/00Separating articles from piles

B65H3/02using friction forces between articles and separator B65H3/04Endless-belt separators B65H3/042separating from the bottom of the pile B65H3/045for separating substantially vertically stacked articles B65H3/047separating from the top of a pile B65H3/06Rollers or like rotary separators B65H3/0607cooperating with means for automatically separating the pile from roller or rotary separator after a separation step B65H3/0615reciprocating and rotatable in one direction only B65H3/0623acting at least during a part of each separation cycle on the articles in a direction opposite to the final separating direction B65H3/063separating from the bottom of pile B65H3/0638Construction of the rollers or like rotary separators B65H3/0646Wave generation rollers B65H3/0653for separating substantially vertically stacked articles B65H3/0661for separating inclined-stacked articles with separator rollers above the stack B65H3/0669Driving devices therefor B65H3/0676with two or more separator rollers in the feeding direction B65H3/0684on moving support B65H3/0692Vacuum assisted separator rollers B65H3/08using pneumatic force B65H3/0808Suction grippers B65H3/0816separating from the top of pile B65H3/0825and acting on the rear part of the articles relatively to the final separating direction B65H3/0833and acting on the front part of the articles relatively to the final separating direction B65H3/0841this action resulting at least during a part of each separating cycle, in a movement of at least the front part of the articles in a direction opposite to the final separating direction B65H3/085separating from the bottom of pile B65H3/0858this action resulting merely in a curvature of each article being separated B65H3/0866the final separation being performed between rollers B65H3/0875the final separation being performed by mechanical grippers B65H3/0883Construction of suction grippers or their holding devices B65H3/0891Generating or controlling the depression B65H3/10Suction rollers B65H3/12Suction bands, belts, or tables moving relatively to the pile B65H3/122Suction tables B65H3/124Suction bands or belts B65H3/126separating from the bottom of pile B65H3/128separating from the top of pile B65H3/14Air blasts producing partial vacuum B65H3/16using magnetic force B65H3/18using electrostatic force B65H3/20using adhesives B65H3/22by needles or the like engaging the articles B65H3/24by pushers engaging the edges of the articles B65H3/242for separating a part of the pile B65H3/245the pile being pre-marked B65H3/247the pile being off-set B65H3/26by separators engaging folds, flaps, or projections of articles B65H3/28by screw or like separators B65H3/30by escapement devices from staggered piles from piles of articles having staggered formations B65H3/32by elements B65H3/322for separating a part of the pile B65H3/325the pile being pre-marked B65H3/327the pile being off-set B65H3/34Article-retaining devices controlling the release of the articles to the separators B65H3/36by separators moved in special paths B65H3/38the paths not enclosing an area B65H3/40by two or more separators acting alternately on the same pile B65H3/42by two or more separators mounted for movement with, or relative to, rotary or oscillating bodies B65H3/44Simultaneously, alternately, or selectively separating articles from two or more piles B65H3/443simultaneously B65H3/446alternatively B65H3/46Supplementary devices or measures to assist separation or prevent double feed B65H3/48Air blast acting on edges of, or under, articles B65H3/50Elements B65H3/52Friction retainers acting on under or rear side of article being separated B65H3/5207Non-driven retainers B65H3/5215for separation from the top of the pile B65H3/5223Retainers of the pad-type B65H3/523for separation from the bottom of the pile B65H3/5238Retainers of the pad-type B65H3/5246Driven retainers B65H3/5253for separation from the top of the pile B65H3/5261of the roller type B65H3/5269of the belt type B65H3/5276for separation from the bottom of the pile B65H3/5284of the roller type B65H3/5292of the belt type B65H3/54Pressing or holding devices B65H3/56Elements B65H3/565for reintroducing partially separated articles in the stack B65H3/58Articles spiked, threaded, cemented, or gummed together, to prevent double feed B65H3/60Loosening articles in piles B65H3/62by swinging, agitating, or knocking the pile B65H3/64by vacuum apparatus B65H3/66Article guides or smoothers B65H3/68immovable in operation