ISO 11540 pdf download

ISO 11540 pdf download

ISO 11540 pdf download Writing and marking instruments — Specification for caps to reduce the risk of asphyxiation
1 Scope
This International Standard specifies requirements to reduce the risk of asphyxiation from capsfor writing and marking instruments. lt relates to such instruments which in normal or foreseeablecircumstances are likely to be used by children up to the age of 14 years.
This International Standard is not applicable to the following:
writing and markinginstruments which are designed or onlyintended for use by adults, e.g.jewellerypens, expensive fountain pens, professional technical pens;
transit caps for refills.
2 Terms and definitions
For the purposes ofthis document, the following terms and definitions apply
2.1writing and marking instrumentsinstruments for writing or marking with a detachable cap,including pens with a self-contained reservoirofink or other marking fluid
capdetachable closure designed to cover the writing or marking tip when not in use
3 Requirements
3.1 General
Caps shall conform to at least one of the following: 3.2 or 3.3
3.2 Cap size
When a cap is introduced with its main axis perpendicular to a 16 +0.05 mm diameter ring gauge of atleast 19 mm thickness, and part of the cap enters the gauge, at least 5 mm of the length shall not enterunder its own weight, see Figure 1.
NOTECaps which conform to this subclause are deemed to be too large to present an inhalation hazard.
3.3 Ventilated caps air flow
When tested in accordance with Annex A, caps shall permit a minimum air flow of 8 l/min, measured at room temperature, with a maximum pressure drop of 1,33 kPa.
NOTE 1 For caps relying on internal ventilation, a singular circular orifice with a cross-sectional area of approximately 3,4 mm 2 can be expected to satisfy this criterion, but multiple small orifices might require a larger total cross-sectional area.
NOTE 2 Guidance is given in Annex B for caps that rely on external ventilation.
NOTE 3 Caps conforming to this subclause are deemed to not present an asphyxiation hazard.
3.4 Test report
The report shall indicate whether the cap conforms to 3.2 or 3.3.
The test report should indicate at least the following information:
a) the size of the tubing used (see A.2.6) and its % relationship to the circumscribing circle of the caps tested;
b) the number of caps tested, the airflow of each cap in both directions, and the minimum air flow recorded.
4 Identification
Writing or marking instruments, or their packaging or accompanying documentation, shall be legibly and indelibly identified with the name, trademark, or other means of identifying the manufacturer and/or supplier.

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