# US 8,540,911 B2 · Methods of manufacturing polymer pipettes

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- Number: US 8,540,911 B2
- Document ID: US8540911B2
- Status: Granted
- Kind: B2
- Application number: 13/295,137
- Filed: 2011-11-14
- Published: 2012-05-17
- Granted: 2013-09-24
- Earliest claimed: 2010-11-16
- Assignees: Miniplast Ein-Shemer ACS Ltd.
- Applicants: Eitan Ochman; Omri Shoham
- Inventors: Eitan Ochman; Omri Shoham
- Web page: https://patentgrep.com/patent/US8540911B2

## CPC

- B29C 67/0014: {for shaping tubes or blown tubular films}
- B01L 3/021: {Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids}
- B01L 2200/025: Align devices or objects to ensure defined positions relative to each other
- B01L 2200/12: Specific details about manufacturing devices
- B01L 2200/14: Process control and prevention of errors
- B01L 2200/147: Employing temperature sensors
- B01L 2300/0838: Capillaries
- B01L 2300/18: Means for temperature control
- B01L 2300/1844: using fans
- B29C 55/22: of tubes {(B29C61/08 takes precedence)}
- B29C 57/00: Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor {, e.g. collapsible mandrels}
- B29C 2793/009: after shaping
- B29L 2023/00: Tubular articles (B29L2024/00 takes precedence {; catheters B29L2031/7542})
- 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)
- B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A method of generating a plurality of pipettes. The method comprises providing a tubular element, cutting the tubular element to form a plurality of two pipettes length components each having a length of about two target pipettes, simultaneously rotating the plurality of two pipettes length components, heating a central portion of each one of the rotated two pipettes length components, stretching each two pipettes length component to extend the respective central portion, and dividing each two pipettes length component at the extended central portion to form the two target pipettes.

## Claims

### Claim 1

A method of generating a plurality of polymer pipettes, comprising:
providing a tubular element;
cutting said tubular element to form a plurality of two pipettes length components each having a length of about two target pipettes;
simultaneously rotating said plurality of two pipettes length components;
heating a central portion of each said rotated two pipettes length component;
stretching each said two pipettes length component to extend respective said central portion; and
dividing each said two pipettes length component at said extended central portion to form said two target pipettes.

### Claim 2 (depends on 1)

The method of claim 1, wherein at least one of said heating, said rotating, said stretching, and said dividing is adjusted to the dimensions of said plurality of two pipettes length components.

### Claim 3 (depends on 1)

The method of claim 1, wherein said rotating is performed in front of a heating element performing said heating.

### Claim 4 (depends on 1)

The method of claim 1, further comprising cooling said plurality of two pipettes length components after said stretching.

### Claim 5 (depends on 1)

The method of claim 1, wherein said dividing is performed using an ultrasonic blade.

### Claim 6 (depends on 1)

The method of claim 1, wherein said rotating is performed during said stretching.

### Claim 7 (depends on 1)

The method of claim 1, further comprising heating left and right ends of each said two pipettes length component, said stretching comprises stretching each said two pipettes length component to extend respective said left and right ends so as to form a mouthpiece shape in each said end.