Dispensing capsule and method and apparatus of forming same
View Patent ↗An apparatus for high speed continuous thermoforming of pulp materials into pulp based products including a beverage dispensing capsule comprising a body having a side wall and a base formed entirely of moulded pulp fibres, said apparatus comprising a holding tank for water and pulp fibres in suspension, a continuous feed belt of articulated mesh toolsets contoured to the preform shape of said products, said belt being inclined to allow partial immersion and partial withdrawal from said suspension by continuous rotation of said belt, vacuum means applied to said mesh toolsets to draw said pulp fibres onto said mesh toolsets immersed in said suspension to form a preform pulp mat of said product.
1. An apparatus for high speed continuous thermoforming of pulp materials into pulp-based products, the apparatus comprising:
a holding tank for a suspension that includes water and pulp fibre,
a continuous feed belt of articulated mesh toolsets contoured to a preform shape of said products, the preform shape being a partially shaped version of a final form shape of the pulp based products, said feed belt being inclined to allow partial immersion and partial withdrawal from said suspension by continuous rotation of said feed belt,
vacuum means applied to said mesh toolsets to draw said pulp fibre onto said mesh toolsets immersed in said suspension to form a preform pulp mat of said products; and
a second toolset to deform the pulp fibre mat from the preform shape to a final form shape of the pulp-based products by the application of pressure.
2. The apparatus according to claim 1 , wherein said mesh toolset represents the female or male preform profile of said products.
3. The apparatus according to claim 2 , further including a transfer tool set to lift sections of said preform pulp fibre mat from said mesh tool sets and to transfer the preform pulp mat to the second toolset.
4. The apparatus according to claim 3 , wherein said transfer tool set is of a male or female profile of said product to engage with the preform profile of an interior or exterior of said product.
5. The apparatus according to claim 1 , wherein the second toolset is configured such that the deformation of the pulp fibre mat from the preform shape to the final form shape by the second toolset involves at least one of:
an increase in the draft angle of the final form shape compared with the preform shape,
an increase in the depth of the final form shape compared with the preform shape, and
a decrease in the wall thickness of the final form shape compared with the preform shape.
6. The apparatus according to claim 1 , wherein the second toolset is shaped to reflect the final shape and dimensions of the pulp-based products.
7. The apparatus according to claim 1 , wherein the second toolset is shaped to correspond with a second preform, and the apparatus further comprises a third toolset to apply pressure and/or heat to the second preform to form the pulp-based products.