Four years later, the Trulevel Roller was developed, incorporating three rollers that follow each other, thus over-riding hollows to give a true surface.
The innovations continued throughout the 1950s with the introduction of the flat slitting tine and in 1957 the first Rotorake was produced. At 14 inches wide, it sold for 48 guineas. The patented contra-rotation principle was developed after much research at the Sports Turf Research Institute.
Moving into the 1960s, the Contravator/Lospred made its debut in 1963. ICI Plant Protection thought that the Rotorake principle of cutting grooves in the ground could be adapted for re-seeding grass land without ploughing. The idea was extended to sports areas. The Contravator used strong contra-rotating blades to cut the grooves and the Lospred, utilising a system of twin Neoprene rollers, dispensed the seed directly into the grooves with great accuracy. The playing surface was preserved and germination was rapid.
One year later, SISIS answered the call of White City, producing the Trulute levelling tool to help with the maintenance problems they were having with their hard porous running track. Raking and brushing were not enough and an implement to level the surface was developed.
Sisis broke new ground in 1971 by develping the first independently powered, vertical action spiker in the UK, the Autocrat. In 1972, the Truline was developed from an original idea from a Scottish groundsman, incorporating a continuous belt system to give a clear line, even in poor conditions. Three years on, Veemo was first produced for fast, effective scarification for fairways.
In 1980, the Hydromain System was produced, the first comprehensive turf maintenance system designed specifically for use on golf greens and tees. The Hydromain was highly manoeuvrable, with unique weight-transfer system, and operated a wide range of attachments. Later that decade, the Quadraplay (left) was introduced. It was a natural progression to combine several implements to give a faster work rate.
There was no let up for SISIS towards the end of the millennium as in 1994 Autospred appeared - an independently powered top dresser with oscillating base plate to reduce “bridging”. In 1999, SISIS North America, a subsidiary company in USA was incorporated and SISIS moved into the grass cutting market with the purchase of the Huxley range of mowers.
Following on from this, in 2001 the Rotorake 600 was developed as a heavy duty, deep scarifier and linear aerator and in 2004 the Aer-Aid System was developed. Air is blasted directly into the root zone to speed up the benefits of reduced compaction and healthier growth - a revolution in the groundcare industry. It is now used in the Arrow Aer-Aid and Javelin Aer-Aid products. In 2005, the Flexicomb was produced. Is it a brush or is it a rake? It’s both!
In 2011, SISIS was acquired by Howardson to sit alongside Dennis as a division providing the groundcare industry with a truly comprehensive range of British manufactured products.