A corrugating machine for forming a flexible paper drinking straw by forming annular corrugations in a tube, including a plurality of corrugating elements and means for moving the tube against the corrugating elements. Each of the corrugating elements is spaced apart from each other in both a lateral direction and a forward direction. The corrugating machine includes an assembly spool and a drum mounted to a side of the assembly spool for rotation about a common axis. A mandrel is mounted to the drum for reciprocation into and out of the spool assembly, to carry the tube against the corrugating elements mounted in an arc defined about the common axis.

A corrugating machine for forming a flexible paper drinking straw by forming annular corrugations in a tube, including a plurality of corrugating elements and means for moving the tube against the corrugating elements. Each of the corrugating elements is spaced apart from each other in both a lateral direction and a forward direction. The corrugating machine includes an assembly spool and a drum mounted to a side of the assembly spool for rotation about a common axis. A mandrel is mounted to the drum for reciprocation into and out of the spool assembly, to carry the tube against the corrugating elements mounted in an arc defined about the common axis.

Apparatus (10) for bending tubular products (100) wherein each tubular product (100) is provided with a flexible portion (111) configured to allow a bending of the tubular product (100). The tubular products (100) are disposed, at least temporarily, on positioning means (19), while bending means (18) each allow the bending of a respective tubular product (100) in correspondence with the flexible portion (111).

A machine for forming a flexible paper drinking straw by forming annular corrugations in a tube includes a plurality of corrugating elements and means for moving the tube against the corrugating elements. Each of the corrugating elements is spaced apart from each other in both a lateral direction and a forward direction. The corrugating machine includes an assembly spool and a drum mounted to a side of the assembly spool for rotation about a common axis. A mandrel is mounted to the drum for reciprocation into and out of the spool assembly, to carry the tube against the corrugating elements mounted in an arc defined about the common axis.

A beverage drinking straw having a pre-salted tip/end for use with alcoholic and non-alcoholic beverages provides a plastic beverage drinking straw having a tip/end and a solid substance attached to the tip/end by a food grade adhesive. A method for producing the beverage straw with precoated tip/end is also provided.

Machine (10) comprising a feed unit (16) configured to feed a plurality of tubular elements, preferably made of paper, toward different working units (18, 19, 20, 21) configured to automatically carry out different workings on the tubular elements (12), including a deformation to make a bellows (13), a cut to make a pointed end (14), or an end cut obliquely, a bending in correspondence with the bellows and a packaging of each straw, the deformation being carried out before the cut.

Machine (10) to produce straws (11), preferably made of paper, comprising a feed unit (16) configured to feed a plurality of tubular elements, preferably made of paper, to different working units (17, 19, 20, 21) configured to automatically carry out different workings on the tubular elements (12), including at least one cut to make a pointed end (13), or an end cut obliquely, a deformation to make a bellows (14), a bend in correspondence with the bellows (14) and the packaging of each straw (11).

Apparatus (100; 200) for making straws comprising a support structure (60; 600) defining an internal volume and carrying a feeding station (30; 300) configured to feed a strip (1a) or at least one discrete sheet (1b) of paper material, and a forming station (10; 101) with a conveyor (13; 130) comprising a base (15; 150), a first side wall (16; 160) and a second side wall (17; 170) converging with each other. The conveyor is configured to receive the strip in a substantially flat form at an infeed portion and wind it around a winding axis to define a cylindrical body (5) made of paper material, wherein the strip edges (2, 3) are facing each other and overlapping to define a mutually overlapping portion (4). The apparatus further comprises a winding body (11; 110) passing through a passage opening (14; 140) of the conveyor, and a constraining station (20; 201) configured to join the strip edges to define a straw.

The invention relates to the technical field of bamboo products machining, in particular to a bamboo straw machining method, comprising: connecting two or more bamboo pieces to form a bamboo strip, continuously winding the bamboo strip according to a preset helical angle to form a cylinder, and cutting the cylinder according to a preset interval to form straws. Compared with traditional methods, the method has the following advantages: bamboo pieces are continuously connected to obtain a bamboo strip for continuous production, then the continuous bamboo strip is continuously wound to obtain a cylinder which is good in mechanical property, stable in structure and uniform in appearance, and finally, the cylinder is cut at equal intervals to continuously produce bamboo straws that are highly consistent in specification and performance; and the working efficiency is improved by over 20% on the whole. Labor and equipment costs are greatly reduced.

A dryer (2) for drying paper tubes (4) conveyed in a multilayer stream (W) transversely to the axis of the paper tubes (4), comprising an inlet (6) adapted to passing through it of a conveyor (3) of the multilayer stream (W), an outlet (7) adapted to passing through it of the conveyor (3) of the multilayer stream (W), at least one drying chamber (5) situated between the inlet (6) and the outlet (7), adapted to receive the conveyor (3) of the multilayer stream (W), at least one heater (8) to heat the air, at least one fan (9) to blow the heated air into the drying chamber (5). At least one wall (13, 14) of the dryer (2) is provided with at least one blowing element (15) for the heated air, and the blowing direction (R) of the heated air through the blowing element (15) is situated substantially transversely to the longitudinal axis (k) of the drying chamber (5) of the dryer (2).