|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||493/295 ; 493/176 ; 493/303 ; 493/457|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 18 인용 특허 : 0|
A process and machine for manufacturing a tubular element, for example for use in forming boxes, in which a strip of material is wound around a mandrel having a cross-section corresponding to that of the tubular element to be formed. The strip of material is arranged to extend in a plane and the mandrel is applied against the strip in a direction perpendicular to said plane to cause lateral parts of the strip to lift up on either side of the mandrel and to define two flaps projecting above the mandrel. A force is then exerted on each of the flaps in a di...
A machine for manufacturing a tubular element from a strip of material by winding the strip around a movable mandrel, the machine comprising a plinth having a working surface in which a guide cavity is defined, the mandrel being mounted so as to be movable in a first direction perpendicular to said working surface between a rest position, spaced apart from said working surface, and a working position, engaged in the said cavity and projecting slightly above said working surface, two folding members which are mounted one on each side of the said cavity so...