Structure of interfolding machine

• US 20060052228A1
• Filed: 08/30/2005
• Published: 03/09/2006
• Est. Priority Date: 08/31/2004
• Status: Active Grant

• Current Assignee: Mtc-Macchine Trasformazione Carta SRL
• Original Assignee: Mtc-Macchine Trasformazione Carta SRL
• Inventors: De Matteis, Alessandro
• Granted Patent: US 7,517,309 B2
• Time in Patent Office: Days
• US Class Current: 493/360
• CPC Class Codes: B65H 2402/10 Modular constructions, e.g. using preformed elements or profiles
• CPC Class Codes: B65H 2402/40 Details of frames, housings or mountings of the whole handling apparatus
• CPC Class Codes: B65H 45/24 Interfolding sheets, e.g. cigarette or toilet papers

Abstract

An interfolding machine having a framework (1) comprising a first plate (20a) and a second plate (20b), parallel to each other, interconnected by means of beams (15, 25, 26). Each plate (20a or 20b), has a modular structure and comprises at least one lower portion (22a or 22b) and an upper portion (23a or 23b). The upper portions (23a, 23b) of the plates (20a, 20b) are connected by beams (25), whereas the lower portions (22a, 22b) are connected by relative beams (26, 15). The upper portion has a portion (5) removable independently from the framework (1). The removable portion (5) comprises cutting rollers (8), the rollers bringing a cutting tool (10) and folding rollers (9). The web conveying rollers (6, 7), conveying the paper along the direction of process are mounted on the fixed portion (24) of the upper portion (23) of the framework (1).

Claims

1. An interfolding machine having an framework comprising:

a feeding section where at least one web of paper is fed;

an interfolding section comprising;

cutting rollers on which knives are arranged suitable for dividing the web of paper into sheets of predetermined length;

folding rollers to which the above described sheets adhere in order to be overlapped in a determined configuration;

folding elements associated to said folding rollers that arrange the sheets in a determined interfolded configuration forming underneath a stack of product; and

,

a separating section where a pack of interfolded sheets is separated from the following and withdrawn from the area of process through separating means;

wherein said interfolding section comprises a portion having a modular structure removable independently from said framework, said portion comprising at least said folding rollers and being replaceable with an equivalent portion.

2. The interfolding machine according to claim 1, wherein said interfolding machine has more removable portions each with rollers of different diameter, whereby it is possible to selectively put in the machine a measured removable portion to provide stacks of interfolded sheets of predetermined length.

3. The interfolding machine according to claim 2, wherein said removable portions, each with rollers of different diameter, are mounted on an automatic introduction/extracting machine capable of receiving more removable portions and extracting/inserting selectively a portion at a time from/in the interfolding machine.

4. The interfolding machine according to claim 1, wherein said folding elements and the relative handling mechanisms are connected to a portion independent from said removable portion.

5. The interfolding machine according to claim 1, wherein said removable portion comprises in addition to said folding rollers also said cutting rollers.

6. The interfolding machine according to claim 1, wherein said removable portion comprises in addition to said folding rollers, said cutting rollers and web conveying rollers.

7. The interfolding machine according to claim 1, wherein said removable portion comprises in addition to said folding rollers, also said folding elements.

8. The interfolding machine according to claim 1, wherein said removable portion is slidingly mounted on guides provided longitudinally with respect to said framework.

9. The interfolding machine according to claim 1, wherein said separating means suitable for entering the stack for separating a pack from a next one being formed, as well as vertical guides containing the stack, are mounted on carriages that can move towards/away from each other along a direction transversal to said framework for bringing them at an operative distance correlated to the size of the rollers mounted on said machine.