Fact or friction: a model for understanding the openability of wide mouth closures

Yoxall, Alaster; Janson, R.

doi:10.1002/pts.785

Cited by 43 publications

(39 citation statements)

References 15 publications

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“…There may well be situations where reducing a grip spacing results in a subject being able to apply less force or torque to a product. For example, studies 9 have shown that in the case of vacuum lug closures, users can apply the highest level of torque to 73-mm-diameter lids. This was found to be the optimum value for both male and female users and although no specific hand measurements were made, a wide age range of subjects was used, suggesting that this optimum value may be independent of hand size.…”

Section: Discussionmentioning

confidence: 98%

Size does matter: further studies in hand–pack interaction using computer simulation

et al. 2007

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This study expands on a previous work by the authors where it was shown through the use of ethnography and finite element models that a link exists between the choice of grip and joint stresses. Further finite element models are created to investigate the relationship between joint stresses and hand dimensions. This is an important area of research for inclusive design, since some of the most vulnerable members of society, such as elderly women, often exhibit extremes of physical dimensions.

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Section: Discussionmentioning

confidence: 98%

Size does matter: further studies in hand–pack interaction using computer simulation

et al. 2007

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“…6,7 Much of the research into designing food packaging which is 'user-friendly' for an ageing population has involved measuring wrist strength for twisting jar lids. [8][9][10][11][12][13][14][15][16][17] This information is valuable for ensuring that jars are designed with the ageing consumer in mind. However, it does not provide any indication for what the ageing consumers actually look for when purchasing food in packages and their attitudes towards currently available packaging.…”

Section: Introductionmentioning

confidence: 98%

Requirements for packaging from an ageing consumer's perspective

2008

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The overall objective of this research was to explore ageing consumers' attitudes towards currently available food packaging in New Zealand. Ninety-nine individuals (over the age of 60) in New Zealand were surveyed to determine packaging attributes of importance when selecting food products. This was followed with a focus group of 13 individuals to discuss improvements to packaging. Frequencies of responses were calculated for the survey data, and crosstabulations and chi-square tests were used to determine the relationships between variables. Price, safety, size of packaging and ability to recycle were of most importance to these individuals. Problems encountered with food packaging included tight lids, small printing and spillage during opening. Of the types of package closures investigated, opening of packages, rather than resealing of packages proved problematic. Fifty percent or more of respondents indicated that peelable induction seals, lug closures and continuous thread closures were problems that occurred 'very often' or 'frequently'. Sixty-one percent of the participants surveyed had asked for assistance opening some types of packages, and this was particularly prevalent among individuals who had weakness in their arms, hands or wrists. Changes to package closures suggested during the focus groups included increasing the size of twist off caps, larger ring pulls on aluminium cans and including more sliding resealable closures on foil and plastic packaging. Larger printing on labels was also recommended by the participants.

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“…Further details of the methods used to determine required opening torque can be found in the author's previous paper. 7 …”

Section: Methodsmentioning

confidence: 97%

How wide do you want the jar?: the effect on diameter for ease of opening for wide‐mouth closures

et al. 2009

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SUMMARYThe ease with which a container can be accessed or its 'openability' is becoming more of an issue for manufacturers and consumers as the average age of the population increases. Ageing brings with it a range of issues including a loss of strength and reduced dexterity. This paper aimed to look at the relationship between diameter, torque and age for standard consumer closures using a torque-measuring device.The results of the investigation show that larger-diameter jars (85 mm) require much higher opening forces than smaller ones (75 mm and below). Smaller jars require lower opening torques, although the force required to open many jars is still higher than many elderly people are able to generate.

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Fact or friction: a model for understanding the openability of wide mouth closures

Cited by 43 publications

References 15 publications

Size does matter: further studies in hand–pack interaction using computer simulation

Size does matter: further studies in hand–pack interaction using computer simulation

Requirements for packaging from an ageing consumer's perspective

How wide do you want the jar?: the effect on diameter for ease of opening for wide‐mouth closures

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