Pad with a relatively large outlet opening comprising a soluble beverage preparation product for use in a coffee machine

A system comprising:

• a coffee machine for preparing a beverage, the coffee machine comprising:
• a holder comprising at least one beverage exit opening and being arranged for accommodating a first pad comprising two sheets of filtering paper connected to each other at the circumferential edges thereof and enclosing an interior space containing roast and ground coffee,
• a lid for closing the holder, and
• wherein the coffee machine is constructed to generate an aqueous fluid flow under pressure into the holder,
• a second pad, different from the first pad, for use in the coffee machine for preparing a beverage for obtaining at least one part of a single beverage serving, which second pad, for use in the coffee machine, is adapted to receive an aqueous fluid that is supplied under pressure so that the aqueous fluid is forced through the second pad for obtaining the beverage that exits the second pad, wherein the second pad includes a covering defining an interior space that is filled with a beverage preparation product for preparing the beverage, wherein the beverage preparation product includes a product soluble in an aqueous fluid, wherein the covering comprises a flexible first sheet and a rigid shell, wherein the flexible first sheet and the rigid shell are connected to each other around their perimeter edges, wherein the rigid shell is equipped with at least one outlet opening, wherein the second pad is further equipped with a second sheet that is positioned on a bottom of the rigid shell, wherein the second sheet is located between the beverage preparation product and the rigid shell, and wherein the flexible first sheet and the second sheet each form a filter that allows an aqueous fluid, including water, and the beverage to pass and that forms a barrier for the beverage preparation product so that, when in use an aqueous fluid under pressure is supplied to the flexible first sheet of the second pad, the aqueous fluid flows through the flexible first sheet to the beverage preparation product so that the beverage is formed, which beverage then flows through the second sheet and via the at least one outlet opening leaves the second pad, and wherein the second pad in use is accommodated in the holder,
• wherein the lid features at least one fluid inlet opening for feeding the aqueous fluid flow under pressure to the second pad so the aqueous fluid is fed under pressure to the flexible first sheet of the second pad and the aqueous fluid is forced through the second pad for preparation of the beverage in the second pad, wherein the beverage leaves the second pad via the at least one outlet opening of the second pad, and then exits the holder through the at least one beverage exit opening,
• wherein the at least one outlet opening has a smallest diameter within a range from 0.88 to 0.94 mm, wherein a restriction formed by the at least one outlet opening is less than a restriction formed by the beverage preparation product itself, wherein the at least one outlet opening has a smallest through-flow area in a direction, in use, perpendicular to a beverage flow through the at least one outlet opening within a range from 0.61 to 0.69 mm2,
• wherein the second pad is arranged such that, in use when the second pad is positioned in the holder, a seal is formed between the second pad and the holder to reduce or prevent a flow of the aqueous fluid from a top side of the second pad around the second pad to the at least one beverage exit opening of the holder, said seal being a static seal, which provides a sealing engagement between the second pad and the holder under the sole influence of gravity on the second pad, and a dynamic seal, which provides a sealing engagement between the second pad and the holder under the influence of the pressure of the aqueous fluid on top of the second pad, wherein the static seal is formed by a contact between a perimeter flange of the second pad, which extends outwardly and downwardly from the second pad and an outer edge of the holder and wherein the dynamic seal is formed between an outer portion of the second pad and the holder at locations positioned at a smaller distance to a center of the second pad than the location of the static seal.