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 paper straw is formed by rolling a sheet into a tubular shape, and the sheet has a substantially elongated shape which defines a first end and a second end of the sheet. The first end of the sheet has an uneven shape, such that a straw end of the paper straw corresponding to the first end of the sheet has a non-circular cut. By preparing the paper sheets in a dedicated shape and/or dimension, with pre-cut patterns formed on the end(s) of the sheet, there is no cutting needed after the sheet is wrapped around and forms the paper 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 straw (1) made from paper or paper-like material and comprising a tubular body (3) having a circumference formed by a wall (5) surrounding a central axis and a bendable part extending axially along the central axis (6), wherein said bendable part comprises at least two corrugated profiles (8A-D) provided in the wall, and each corrugated profile comprises inward corrugations (9A-D) and outward corrugations (10A-D) being positioned one after the other in axial direction along the central axis, and a system and method to produce the straw.

A method for manufacturing straws includes the steps of predisposing a web or a discrete sheet of sheet material, wherein the web or discrete sheet extends between an end portion and tail portion; predisposing a winding body extending along an axis; completely winding the web or discrete sheet around the winding body for defining a cylindrical body of sheet material wherein the end portion and tail portion face each other for defining a mutual overlapping portion; and constraining the end portion to the tail portion in the mutual overlapping portion in order to define a straw extending between a first and second substantially circular free edges, wherein the mutual overlapping portion extends between the first and second free edges of the straw along a rectilinear direction.

The invention relates to a production machine for producing rod-shaped products from a continuous strand of a continuous strip adhesively bonded to form a tube, comprising a device for applying a glue track to a strip, a format portion, in which the continuous strip into the continuous strand by shaping and adhesive bonding, and a cutting device which cuts the rod-shaped products from the continuous strand at a predetermined length, wherein the device for applying the glue track is formed by a device which applies the glue intermittently to form glue-free portions arranged at regular intervals, and a sensor apparatus is provided, which is directed towards the continuous strip or the continuous strand and generates a signal depending on the passage of a glue-free portion, and the device for applying the glue track is designed to change the length of the glue-free portions in the longitudinal direction of the glue track.

The invention relates to drinking U-straws and more particularly to a paper for manufacturing drinking U-straws, which is environmental friendly, bio-degradable and is able to be formed in the shape of a bent straw with an accordion-like structure at the bend. The paper has high water resistance as well as high strength and elongation properties compatible with the intended use. In particular, the paper for forming a U-straw includes: •between 10 and 50 dry wt % of first fibers having a length of between 1.4 mm and 2.5 mm; •between 40 and 80 dry wt % of second fibers having a length of between 0.3 mm and 0.8 mm; and•between 1 and 6 dry wt % of a sizing agent.

Method and apparatus for making a corrugated zone to a bendable drinking straw. The drinking straw is made of a web that is moved along a guided path in a wanted speed and the corrugated zone is created by clamping the web with a clamping mechanism against the guided path for a wanted period of time to stop the motion of the second part of the web after the clamping mechanism.

A flexible paper straw includes a paper tube which is a spiral tube having a tube wall with at least two layers and formed by using glue and paper material while the paper material is paper sheet material having at least two layers of paper, a first layer of paper and a second layer of paper; and a compressed corrugated portion which is a circular tube having parallel ridges and grooves on longitudinal sections thereof, formed on the tube wall of a part of the paper tube with a certain length and able to be bent freely.

Provided are improved drinking straws comprising an integrated device providing an anti-outflow capability, methods for their use, and processes for their manufacture. Specifically, the drinking straw is formed substantially of a cellulosic material and wherein the drinking straw and the device providing the anti-outflow capability comprising a flexible flap having a fixed end affixed to an interior surface of a sidewall of the drinking straw, and a part of the flexible flap obscuring an inlet orifice passing through the sidewall adjacent to the flexible flap and forming a liquid tight seal when a reduced pressure condition exists within the interior flow passage of the drinking straw.