# US 11,110,701 B2 · Main body of a doctor blade chamber, doctor blade chamber thereof and methods of manufacturing same

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- Number: US 11,110,701 B2
- Document ID: US11110701B2
- Status: Granted
- Kind: B2
- Application number: 16/629,126
- Filed: 2018-07-06
- Published: 2020-04-30
- Granted: 2021-09-07
- Earliest claimed: 2017-07-07
- Assignees: Bobst Lyon; Epsilon Composite
- Applicants: Bobst Lyon; Epsilon Composite
- Inventors: René Bazin; Philippe Fleury; Julien Mattrand; Steve Peter Daniel Willems
- Web page: https://patentgrep.com/patent/US11110701B2

## CPC

- B41F 31/027: {Ink rail devices for inking ink rollers}
- B29C 70/52: Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29L 2031/767: {Printing equipment or accessories therefor}
- B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A main body of doctor blade chambers including a first portion configured to hold a first doctor blade, a second portion configured to hold a second doctor blade, a third portion connecting the first portion and the second portion, a cavity intended to receive ink and defined at least by the first portion, the second portion and the third portion, characterized in that the main body is a single closed hollow profile extending along a longitudinal main axis X-X, the main body being made of pultruded composite material.

## Claims

### Claim 1

A main body of a doctor blade chamber comprising:
a single hollow closed profile delimited by a first portion configured to hold a first doctor blade, a second portion configured to hold a second doctor blade, and a third portion connecting the first portion and the second portion, the single hollow closed profile extending according to a longitudinal main axis X-X of the main body, the single hollow closed profile being made of a pultruded composite material,
a cavity outside of the single hollow closed profile intended to receive ink and delimited at least by a part of the first portion, a part of the second portion, and the third portion,
a water channel that is positioned in a hollow of the single hollow closed profile and extending along the longitudinal main axis X-X, and
at least one washing nozzle opening into the water channel and protruding from the water channel through the third portion of the single hollow closed profile.

### Claim 2 (depends on 1)

The main body according to claim 1, wherein the composite material is a pultruded composite carbon.

### Claim 3 (depends on 1)

The main body according to claim 1, wherein the composite material comprises a fiber volume strictly larger than 60% of the volume of the composite.

### Claim 4 (depends on 3)

The main body according to claim 3, wherein the fiber volume is between 61% and 70% of the volume of the composite.

### Claim 5 (depends on 1)

The main body according to claim 1, comprising a non-woven fabric arranged on a surface of the main body, the non-woven fabric being integrated into the mass of the main body.

### Claim 6 (depends on 1)

The main body according to claim 1, wherein the composite material in which the main body is made by pultrusion with a fiber rate strictly higher than 60%, has a performance ratio higher than 112% compared to the performance ratio of the same composite material in low-pressure resin injection molding.

### Claim 7 (depends on 1)

A doctor blade chamber comprising:
a main body according to claim 1,
a first doctor blade mounted on a first portion of the main body,
a second doctor blade mounted on a second portion of the main body, opposite the first doctor blade.

### Claim 8 (depends on 7)

The doctor blade chamber according to claim 7, wherein a first side of the water channel is arranged against a first internal face of the single hollow closed profile and a second side of the water channel, opposite to the first side of the water channel, is arranged against a second internal face of the single hollow closed profile.

### Claim 9 (depends on 7)

The doctor blade chamber according to claim 7, wherein the water channel is a profile made of a composite material comprising carbon.