Sliced BreadSliced BreadRozenbaum

Motivations/Interests• No crumbling or

squashing

• Makes daily life easier

• Perfect slices

How Was it Developed?• Otto Rohwedder –

Prototype in Iowa (1917)

• Chilicothe Baking Company - 1928 (MO)

• Wonder Bread – mass commercial production

The Process• 4 Steps on How

To:– Open not tear

wrapping– Removing pins – Close to preserve

freshness

Scientific Principles• Using a conveyor

- machinery or gravity

• Razor sharp blades

• Makes bread precut and easy to use

Using Gravity

The IMPACTIMPACT• A staple in the

household

• A breakthrough in baking

• “The best thing since sliced bread”

Citations• On hundred great things in a century when consumer became king, product

innovation reached unprecedented heights. (1998, December 7). Time, 152(23), Retrieved from http://galenet.galegroup.com/servlet/HistRC/hits?r=d&origSearch=false&sortOrder=RE&o=&bucket=iac&tab=2&n=10&l=dJ&hdb=US&items=0&c=2&tabMap=66&docNum=A53368019&locID=stil34938&secondary=true&t=RK&s=1&SU=sliced+bread

• baking. (2010). In Encyclopædia Britannica. Retrieved February 14, 2010, from Encyclopædia Britannica Online: http://search.eb.com/eb/article-50228

• Temple, W. (2008, July 5). Australian news. Retrieved from http://www.news.com.au/sliced-bread-a-world-first/story-0-1111116833769

• Pictures– Löhner, F. (2006). Calculating the force and kinetic coefficient of friction. Retrieved from

http://www.cheops-pyramide.ch/khufu-pyramid/force-friction.html – Bread rises, free falls [Web log message]. (2009, August 10). Retrieved from

http://pantspantsnopants.files.wordpress.com/2009/08/825101sliced-loaf-of-bread-posters.jpg