A flowable material dispenser including a barrel defining a cylindrical interior volume for holding a flexible material bag containing a flowable material. A nozzle is attached to the first end of the barrel for discharging the flowable material through a nozzle hole; and a closure is disposed on the second end. A center nut disposed on the closure holds a threaded drive rod threadably and rotatably inserted in the center nut. The drive rod includes an inner end and an outer end. Drive structure for imparting rotational forces to the drive rod moves the drive rod reciprocally and axially within the cylindrical interior volume of the barrel to twist and wring out flowable material contained within the flexible material bag.

A hollow container is combined with a burstable envelope retaining a liquid agent. The container is designed to allow a user to open the envelope by bursting or likewise rupturing the envelope while it remains in the container. The design of the envelope provides a predictable bursting location and a lower bursting pressure of the envelope to provide a more controlled release of liquid agent. Bursting forces may be applied in any of a variety of ways just as by twisting or crushing. The design allows for desired use of beneficial envelope materials such as polyester films that are otherwise difficult to rupture.

A roll-up grout bag apparatus includes a dowel with a slot formed therethrough from an open end to a closed end thereof. A lever is engaged with the dowel at the closed end to facilitate rolling the dowel about an axis thereof. The slot receives a filling end of a grout bag and is rolled onto the dowel using the lever to urge grout within the bag to be dispensed from an opening at a narrow dispensing end of the bag. The apparatus may include a ratchet mechanism to engage the lever with the dowel.

A dispenser for dispensing a fluent product by twisting a flexible bag which contains the fluent product. The bag ends are connected to a container composed of a lower hollow cylinder which fits into an upper hollow cylinder. The two parts have a mutual axis which enable twisting the bag by rotating one part with respect to the other. The lower part has elastic fins on its outer cylindrical surface and the upper part has ramp shaped grooves all along its inner cylindrical surface. The fins which fit the grooves implement a rotational ratchet mechanism with capability for vertical displacement which also allows for linear bag contraction during twisting. The ratchet mechanism enables accurate control of outflow and also keeps the bag in the last twisted pose it arrives to. The bag is connected to two container parts by two butterfly nuts which enable easy manual bag replacement.

A hollow container is combined with a burstable envelope retaining a liquid agent. The container is designed to allow a user to open the envelope by bursting or likewise rupturing the envelope while it remains in the container. The design of the envelope provides a predictable bursting location and a lower bursting pressure of the envelope to provide a more controlled release of liquid agent. Bursting forces may be applied in any of a variety of ways just as by twisting or crushing. The design allows for desired use of beneficial envelope materials such as polyester films that are otherwise difficult to rupture.

A flowable material dispenser including a barrel defining a cylindrical interior volume for holding a flexible material bag containing a flowable material. A nozzle is attached to the first end of the barrel for discharging the flowable material through a nozzle hole; and a closure is disposed on the second end. A center nut disposed on the closure holds a threaded drive rod threadably and rotatably inserted in the center nut. The drive rod includes an inner end and an outer end. Drive structure for imparting rotational forces to the drive rod moves the drive rod reciprocally and axially within the cylindrical interior volume of the barrel to twist and wring out flowable material contained within the flexible material bag.

A roll-up grout bag apparatus includes a dowel with a slot formed therethrough from an open end to a closed end thereof. A lever is engaged with the dowel at the closed end to facilitate rolling the dowel about an axis thereof. The slot receives a filling end of a grout bag and is rolled onto the dowel using the lever to urge grout within the bag to be dispensed from an opening at a narrow dispensing end of the bag. The apparatus may include a ratchet mechanism to engage the lever with the dowel.