A method for producing a paper lid includes a first step of holding down an outer edge area of a blank that is mainly made of paper, a second step of forming an inner fitting portion in a central area of the blank, while holding down the outer edge area, and a third step of forming an outer fitting portion in the central area, where the inner fitting portion is formed, while holding down the outer edge area.

The invention relates to a clamshell packaging for airtight packaging of foodstuff, which packaging comprises: —a tray folded out of a single sheet of material, preferably cardboard, which tray has at least two adjacent pool parts, each pool part having a bottom wall and upstanding walls arranged around the circumferential edge of the bottom wall, wherein the at least two adjacent pool parts are hingedly connected to each other along an upper edge of a respective upstanding wall, such that the at least two adjacent pool parts can be hinged on top of each other to form a closed box, —a circumferential, horizontal flange arranged to the tray to at least some of the upper edges of the upstanding walls, and —a plastic barrier foil arranged in the pool parts and extending onto and substantially covering the circumferential, horizontal flange wherein the circumferential, horizontal flange comprises a seal zone extending along the full length of the flange, wherein the seal zone is line symmetrical along the hinge line at the upper edge of the connected walls.

A method for manufacturing a cellulose product, comprising the steps: dry forming a cellulose blank in a dry forming unit; arranging the cellulose blank in a forming mould; heating the cellulose blank to a forming temperature in the range of 100° C. to 200° C.; and pressing the cellulose blank in the forming mould with a forming pressure of at least 1 MPa.

A thermoform packaging machine comprising a forming station. The forming station comprises at least one forming tool lower part, the forming tool lower part may be movable transversely to an operating direction of the thermoform packaging machine. The forming tool lower part may comprise at least one reception unit with one or a plurality of troughs for receiving cardboard elements. At a forming position the forming tool lower parts are in contact with the forming tool upper parts such that the first film web may be formed-in into the forming tool lower parts. Further, the first film web may be formed-in into the cardboard elements during the forming process and, in the case of a skin film, an adhering or an adhesive connection may be established between the skin film and the inner surfaces of the cardboard elements.

A tray (2) is made of cardboard, paperboard or other lightweight foldable sheet material and comprises one or more pockets (8) for receiving product. The tray (2) comprises a top sheet (4) defining one or more top sheet openings (10) for the one or more pockets (8) and a bottom sheet (6) attached to the top sheet (4) and comprising one or more bottom sheet openings (12) aligned with the top sheet openings (10). The top sheet (4) comprises one or more respective sets of top sheet flaps (28, 30, 32) which each comprise a top sheet flap proximal panel (28P, 30P, 32P) hingedly connected to the top sheet (4) about a respective top sheet flap proximal hinge line (36, 38, 40) defined at the respective top sheet opening (10) At least one of the top sheet flaps (28, 30, 32) further comprises a top sheet flap distal panel (28D, 30D, 32D) hingedly attached to the respective top sheet flap proximal panel (28P, 30P, 32P) about a respective top sheet flap distal fold line (42, 44, 46). Each top sheet flap (28, 30, 32) is folded about the respective top sheet flap proximal hinge line (36, 38, 40) to extend through the bottom sheet opening (12) such that the top sheet flap proximal panel (28P, 30P, 32P) thereof defines, at least in part, a side wall (66, 68, 70) of the pocket (8). The bottom sheet (6) comprises one or more respective sets of bottom sheet flaps (50). At least one bottom sheet flap (50) comprises a bottom sheet flap proximal portion (50P) hingedly attached to the bottom sheet (6) about a respective bottom sheet flap proximal hinge line (52) defined at the respective bottom sheet opening (12) and a bottom sheet flap distal panel (50D) hingedly attached to the bottom sheet flap proximal panel (50P) about a respective bottom sheet flap distal fold line (62). The bottom sheet flap (50) is folded about the respective bottom flap proximal hinge line (58) such that the bottom sheet flap proximal panel (50P) defines at least in part a pocket side wall (74), and the bottom sheet flap distal panel (50D) defines at least in part a base wall (64) of the pocket (8). Within each pocket (8), at least one top sheet flap distal panel (28D, 30D, 32D) is adhesively secured to the bottom sheet flap distal panel (50D).

A method for manufacturing flexible paper straws and flexible paper straws are revealed. The method includes the steps of preparing a paper tube which is a spiral tube by glue and paper, inserting a support shaft into the paper tube axially, placing the paper tube with the support shaft between a first roller and a second roller before curing of the glue while the first and second rollers are in parallel and having a plurality of circular grooves on a cylindrical surface thereof, rolling the paper tube by the first and second rollers to form a corrugated portion on a part of the paper tube, squeezing the corrugated portion to compress the corrugated portion for a period of time for curing the glue and holding shape of the corrugated portion, and removing the support shaft to get a flexible paper straw which is bendable at the corrugated portion.

A method for producing a cellulose product from a multi-layer cellulose blank structure, wherein the method comprises the steps; forming the multi-layer cellulose blank structure from at least a first layer of dry-formed cellulose fibres and a second layer of a cellulose fibre web structure, through arranging the at least first layer and second layer in a superimposed relationship to each other and in the superimposed relationship arranging the at least first layer and second layer in contact with each other; arranging the multi-layer cellulose blank structure in a forming mould; heating the multi-layer cellulose blank structure to a forming temperature in the range of 100 C. to 300 C., and forming the cellulose product from the multi-layer cellulose blank structure in the forming mould, by pressing the heated multi-layer cellulose blank structure with an isostatic forming pressure of at least 1 MPa, preferably 4-20 MPa, wherein the multi-layer cellulose blank structure is shaped into a two-dimensional or three-dimensional fibre composite structure having a single-layer configuration.

A pre-punched material sheet for constructing a packaging trough, the material sheet includes a sub-area that has been punched out incompletely so that the sub-area is connected to a residual area of the material sheet through a plurality of retaining lugs. The material sheet is positioned on top of a female die part of a forming tool and the sub-area at least partially covers an opening of a forming cavity of the female die part. The residual area of the material sheet may be clamped in position against the female die part. The sub-area of the material sheet is sucked onto an insert in the forming cavity using a vacuum. The insert is vertically movable in the forming cavity from a first position to a second position to draw the sheet into the forming cavity and thereby form the packaging trough.

A forming apparatus for producing paperboard pressware includes servo-driven blanking and product forming subsystems, and a computerized control system to provide independent control of the servo-driven subsystems for improved timing and positional accuracy. Independent and individual electronic control of the various component subsystem enables remote control and monitoring of production and machine functions.

Disclosed is a method of manufacturing a paper lid for a food container, the method including a blanking step of cutting out lid molding paper having radial wrinkles at the edge thereof from base paper having upper and lower surfaces, each of which is treated with a synthetic resin coating, a primary molding step of molding the paper lid including a cover plate and a skirt wall bent downwards along the edge of the cover plate, and a secondary molding step of forming a guide part obtained by bending a large diameter part of the skirt wall so as to be inclined outwards, the guide part guiding coupling with the upper portion of the food container, and molding a curling tight-contact part configured to tightly surround the outside of a reinforcement frame of the food container by curling the upper end of the guide part in the inward direction.