# US 4,395,448 A · Filling sheet attaching means for gas and liquid contact apparatus and method of assembly of plural parallel filling sheets

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- Number: US 4,395,448 A
- Document ID: US4395448A
- Status: Granted
- Kind: A
- Application number: 06/333,409
- Filed: 1981-12-22
- Granted: 1983-07-26
- Earliest claimed: 1981-12-22
- Assignees: Research-Cottrell, Inc.
- Inventors: Marcel R. Lefevre; Anthony M. DePalma
- Web page: https://patentgrep.com/patent/US4395448A

## CPC

- B32B 3/06: for securing layers together; for attaching the product to another member, e.g. to a support {, or to another product, e.g. groove/tongue, interlocking}
- B29C 65/56: using mechanical means {or mechanical connections, e.g. form-fits}
- B29C 65/58: Snap connection
- B29C 66/83221: {cooperating reciprocating tools, each tool reciprocating along one axis}
- F28F 25/087: {Vertical or inclined sheets; Supports or spacers}
- Y10T 428/24008: including fastener for attaching to external surface
- Y10T 428/24149: Honeycomb-like
- Y10T 428/24479: including variation in thickness
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Filling sheets are disclosed for use in a gas and liquid contact apparatus. The sheet members are identical and each of the sheet members has a plurality of male type and female type locking tabs. The tabs are positioned in rows and columns and male type tabs in any row or column are adjacent a female type tab whereby rotation of alternate sheets 180.degree. bring the male and female type tabs of alternate sheets into alignment.

## Claims

### Claim 1

Filling sheets for a gas and liquid contact apparatus comprising a plurality of identical sheet members, each of said sheet members having a plurality of male type and female type locking tabs, said tabs being positioned in rows and columns and male type tabs in any row or column being adjacent a female type tab whereby rotation of alternate sheets 180.degree. bring the male and female type tabs of said alternate sheets into alignment.

### Claim 2 (depends on 1)

The filling sheets as defined in claim 1 wherein the sheets comprise plastic and the cooperating locking tabs are formed in male dies and form male and female connectors.

### Claim 3 (depends on 2)

The filling sheets as defined in claim 2 wherein the locking tabs are heat sealed as they are assembled.